{"content_id":"jymvdcp4vf","slug":"hot-water-mat-water-change-storage-restart","locale":"en","schema_type":"HowTo","category":"how_to","category_name":"How-to","title":"Water-Heated Bed Pad: Change Water and Reuse After Storage","summary":"Topping up and fully replacing the water serve different purposes. Check your model's manual for the correct water type and draining method, then check the pad for damage and leaks before reusing it after long-term storage.","sponsorship_disclosure":null,"affiliate_disclosure":null,"commerce_disclosure":null,"author":{"name":"Injoys Editorial Team","url":"https://injoys.com/ko/about"},"key_points":["Find the official user manual using the model name on the product label.","Distinguish between topping up low water, replacing all the water, and draining it before storage.","Turn off the heat and let the pad cool sufficiently before following the draining steps for your model.","After long-term storage, check the hoses and connections for damage.","Fill with fresh water as directed in the manual, then check for leaks and errors."],"content_markdown":"If your water-heated mat has been stored for a long time, check the hoses and connections first. Handle any remaining water according to the drainage instructions for your model. After filling it with fresh water, check for leaks and errors. Topping up when the water is low is different from replacing all the water.\n\nThe drainage guidance is based on the Steamboy FAQ dated August 21, 2026, and the user manuals for individual models.\n\n## Supplies and Official Manuals to Prepare Before Starting\n\nFirst, find the manual using the model name on the product label. Drainage methods may differ even within the same brand. Steamboy provides manuals for individual models through customer support on its official store website.\n\n- The full model name on the product label\n- The user manual for that model\n- A container to catch the drained water and a towel to wipe up moisture\n- The drainage connector or air pump specified in the manual\n- Fresh water of a type allowed by the manual\n\nWater-heated mats circulate heated water inside the mat. This means you need to maintain both the boiler tank and the inside of the mat. Emptying only the boiler does not drain the entire system.\n\n## Comparing Topping Up, Full Water Replacement, and Draining Before Storage\n\nChoose the right water maintenance task based on the current condition and when you plan to use the product next. Topping up means adding the amount that is missing. Full replacement means draining the existing water and replacing it with fresh water. Draining before storage prepares the product for a period without use.\n\n| Task | When it is needed | Purpose | What to check next |\n| --- | --- | --- | --- |\n| Topping up | The low-water signal specified in the manual appears | Add the missing amount | The signal to stop filling and any leaks |\n| Full water replacement | The model's replacement guidance applies, or the water is contaminated | Replace the existing water with fresh water | How to drain the boiler and mat |\n| Draining before storage | The product will not be used for a long time | Remove the water inside and dry the product | Handling residual water and how to store the product |\n| Reuse after storage | Taking the product out after a long period in storage | Check for damage, then confirm normal operation | Hoses, connections, leaks, and errors |\n\nSteamboy's water maintenance FAQ gives the following guidance.\n\n\u003e There is no fixed schedule for regularly replacing all the water.\n\u003e\n\u003e Steamboy FAQ, “When should I top up or drain the water in a water-heated mat?”\n\nDo not apply this statement directly to products from other manufacturers. The replacement guidance for your model takes priority. If no interval is given, contact customer support with the model name.\n\n## Checking Water Types and Replacement Timing\n\nCheck your model's manual to find out what water to use. The Steamboy FAQ allows bottled drinking water, tap water, and filtered water. It advises against using seawater, groundwater, or saline solution. Additives such as cleaning agents or fragrances must not be used either.\n\nDo not decide how often to replace the water in your water-heated mat based on an individual's Q\u0026A response. First, check whether the manual specifies a replacement interval. Read the filter replacement guidance separately as well. The Steamboy S8000 S manual says to replace the clean filter with a new one after 90 days (3 months) and notes that it is effective to change the water in the mat and boiler to fresh water at the same time.\n\n1. Check the manual for the types of water you can use.\n2. Look for a specified interval for replacing all the water.\n3. If there is a filter, check the filter maintenance section too.\n4. If foreign matter keeps appearing, ask the manufacturer how to inspect the product.\n\nDo not add citric acid or detergent for cleaning on your own. Check whether the manufacturer allows the method you plan to use for internal cleaning. If a problem remains after replacing the water, have the product checked before restarting it.\n\n## Steps for Draining a Water-Heated Mat\n\nStop heating and let the water inside cool sufficiently before draining. Disconnecting a hose while the water is hot can cause burns. Manual and automatic drainage require different power settings.\n\n### Manual Drainage\n\nCarry out manual drainage with the product unplugged. The instructions below are for Steamboy products that use an air pump. If your product has a different design, follow its model-specific manual.\n\n1. Turn off the power and unplug the product.\n2. Let the water in the boiler and mat cool sufficiently.\n3. Place a container to catch the water, then disconnect the hose from the boiler.\n4. Remove the boiler's water cap and filter as instructed in the manual.\n5. Tilt or turn the main unit upside down in the specified direction to drain it.\n6. Lay the mat flat and connect the specified drainage tool.\n7. For models that use an air pump, pump air into the indicated opening.\n8. Catch the water coming out of the other side in a container.\n\nIf the water does not drain easily, do not force it. Stop if you see damage to a connection. Ask the manufacturer's customer support about the drainage tool and the condition of the connections.\n\n### Automatic Drainage\n\nFor automatic drainage, follow the button instructions and connection sequence for your model. Some products need to remain connected to power to run this function. Applying the manual drainage procedure as-is may prevent it from working.\n\n1. Stop heating and let the water inside cool sufficiently.\n2. Prepare the dedicated drainage parts for the correct size.\n3. Check the required power state and connection sequence in the manual.\n4. Run the drainage function as instructed.\n5. Once it finishes, handle any remaining water according to the manual.\n\n## The Difference Between Turning Off the Power Button and Unplugging\n\nTurning off the power button is not the same as unplugging the product. On the Steamboy S8000 S, the drain button is used while the power is turned off. The instructions say to unplug the power cord when removing residual water from the boiler. Even on the same product, the required power state changes depending on the step.\n\n| Task | Power state to check | What to follow or confirm |\n| --- | --- | --- |\n| Stopping heating and cooling | Heating function turned off | Confirm that the water has cooled sufficiently |\n| Manual drainage | Product unplugged | Manual drainage instructions |\n| Automatic drainage | Power connected as needed for operation | Automatic drainage instructions for that model |\n| Removing residual water after drainage | Power disconnected as specified in the manual | Whether automatic drainage has finished |\n| Refilling | Model-specific installation sequence | Whether power is used during filling |\n\nBefore starting, mark the power-related instructions in the manual separately. The wording in the general FAQ may differ from the model's manual. If the order in which to apply the instructions is unclear, check with the manufacturer before proceeding.\n\n## Steps for Reuse After Long-Term Storage\n\nWhen reusing the product, inspect its exterior before adding water. Steamboy's storage FAQ advises checking the hoses and connectors for damage. After adding water, check for leaks too.\n\n1. Check the hoses and connectors for damage before connecting the power.\n2. Check that the power cord and plug are free of damage and moisture.\n3. Follow the model's drainage instructions to handle any remaining water.\n4. Spread out the mat and arrange the hoses so they are not kinked.\n5. Connect the boiler and mat as instructed in the manual.\n6. Operate the power controls in the sequence specified in the installation guide.\n7. Slowly add an allowed type of water and stop at the specified water level.\n8. Close the water cap and check for leaks at the connections and beneath the mat.\n9. Check whether the low-water signal and errors clear.\n\nTop up the water in your water-heated mat according to the signals specified for the model. The Steamboy FAQ advises against adding water just because the water-level indicator lights have decreased. This guidance concerns products that give both a low-water indication and an audible warning. If the signals continue after you have added enough water, stop adding more. The Steamboy S8000 S manual warns not to open the water cap while the boiler is operating except to add water when it runs low, because heated water can flow back and cause burns.\n\n### Examples of Different Fill Volumes for the Same Queen Size\n\nEven when the size is the same, the amount of water needed varies by model. The figures below are from the respective user manuals. They are not universal fill volumes to apply to other models.\n\n| Model | Size category in the manual | Water fill volume |\n| --- | --- | --- |\n| Steamboy S8000 S | Queen | 1,300mL |\n| Steamboy SM60·SM65·SM67 | Queen | 1,450mL |\n\nIf water is already left inside, do not add the full amount shown in the table. The total fill volume is different from the amount currently needed for topping up. When adding water, follow your model's water-level guidance and stop-filling signals.\n\n## Checks Before Storing a Water-Heated Mat\n\nBefore long-term storage, drain the boiler and mat and let them dry thoroughly. Steamboy advises leaving no water or moisture behind. Whether to fold or roll the mat depends on its type.\n\n| Product category in the Steamboy FAQ | Storage method | Points to watch |\n| --- | --- | --- |\n| Bed mat | Fold with the sleeping surface and pattern facing outward | Prevent sharp kinks in the connecting hose |\n| Carpet mat | Roll with the patterned side facing outward | Prevent kinks in the connecting hose |\n| All types | Keep away from moisture, direct sunlight, and heat sources | Do not place heavy objects on top |\n\nDo not apply these categories directly to products from other manufacturers. Check the storage instructions for your mat. Washing the cover and draining the inside are also separate maintenance tasks. Check the separate care label to see whether washing is allowed.\n\n## When to Stop Restarting the Product and Have It Checked\n\nIf there are leaks or recurring errors, stop using the product and contact the manufacturer. Do not assume it is operating normally just because you have replaced the water. On Steamboy's official store website, customer support links to product inquiries and after-sales service requests.\n\n| Condition found | Next action |\n| --- | --- |\n| The low-water indicator stays on despite sufficient water | Stop adding water and check the model-specific error guidance |\n| Water leaks from a hose or connection | Stop using the product and contact official after-sales service |\n| A connection is damaged or drainage is poor | Do not force it; ask about an inspection |\n| The power section is wet or liquid has entered it | Do not touch the product, plug, or power cord; ask for help |\n| A burning smell, smoke, or abnormal overheating occurs | Turn off the power if it is safe to do so, and do not restart |\n\nWhen making an inquiry, provide both the model name and the displayed error. Noting where the leak occurs and the circumstances also helps with the assessment. Even after normal operation resumes, follow the manual's precautions against low-temperature burns. Water maintenance alone cannot prevent burns from prolonged contact.","content_html":"\u003cp\u003eIf your water-heated mat has been stored for a long time, check the hoses and connections first. Handle any remaining water according to the drainage instructions for your model. After filling it with fresh water, check for leaks and errors. Topping up when the water is low is different from replacing all the water.\u003c/p\u003e\n\u003cp\u003eThe drainage guidance is based on the Steamboy FAQ dated August 21, 2026, and the user manuals for individual models.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#supplies-and-official-manuals-to-prepare-before-starting\" class=\"anchor\" id=\"supplies-and-official-manuals-to-prepare-before-starting\"\u003e\u003c/a\u003eSupplies and Official Manuals to Prepare Before Starting\u003c/h2\u003e\n\u003cp\u003eFirst, find the manual using the model name on the product label. Drainage methods may differ even within the same brand. Steamboy provides manuals for individual models through customer support on its official store website.\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe full model name on the product label\u003c/li\u003e\n\u003cli\u003eThe user manual for that model\u003c/li\u003e\n\u003cli\u003eA container to catch the drained water and a towel to wipe up moisture\u003c/li\u003e\n\u003cli\u003eThe drainage connector or air pump specified in the manual\u003c/li\u003e\n\u003cli\u003eFresh water of a type allowed by the manual\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003eWater-heated mats circulate heated water inside the mat. This means you need to maintain both the boiler tank and the inside of the mat. Emptying only the boiler does not drain the entire system.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#comparing-topping-up-full-water-replacement-and-draining-before-storage\" class=\"anchor\" id=\"comparing-topping-up-full-water-replacement-and-draining-before-storage\"\u003e\u003c/a\u003eComparing Topping Up, Full Water Replacement, and Draining Before Storage\u003c/h2\u003e\n\u003cp\u003eChoose the right water maintenance task based on the current condition and when you plan to use the product next. Topping up means adding the amount that is missing. Full replacement means draining the existing water and replacing it with fresh water. Draining before storage prepares the product for a period without use.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTask\u003c/th\u003e\n\u003cth\u003eWhen it is needed\u003c/th\u003e\n\u003cth\u003ePurpose\u003c/th\u003e\n\u003cth\u003eWhat to check next\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Task\"\u003eTopping up\u003c/td\u003e\n\u003ctd data-label=\"When it is needed\"\u003eThe low-water signal specified in the manual appears\u003c/td\u003e\n\u003ctd data-label=\"Purpose\"\u003eAdd the missing amount\u003c/td\u003e\n\u003ctd data-label=\"What to check next\"\u003eThe signal to stop filling and any leaks\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Task\"\u003eFull water replacement\u003c/td\u003e\n\u003ctd data-label=\"When it is needed\"\u003eThe model's replacement guidance applies, or the water is contaminated\u003c/td\u003e\n\u003ctd data-label=\"Purpose\"\u003eReplace the existing water with fresh water\u003c/td\u003e\n\u003ctd data-label=\"What to check next\"\u003eHow to drain the boiler and mat\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Task\"\u003eDraining before storage\u003c/td\u003e\n\u003ctd data-label=\"When it is needed\"\u003eThe product will not be used for a long time\u003c/td\u003e\n\u003ctd data-label=\"Purpose\"\u003eRemove the water inside and dry the product\u003c/td\u003e\n\u003ctd data-label=\"What to check next\"\u003eHandling residual water and how to store the product\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Task\"\u003eReuse after storage\u003c/td\u003e\n\u003ctd data-label=\"When it is needed\"\u003eTaking the product out after a long period in storage\u003c/td\u003e\n\u003ctd data-label=\"Purpose\"\u003eCheck for damage, then confirm normal operation\u003c/td\u003e\n\u003ctd data-label=\"What to check next\"\u003eHoses, connections, leaks, and errors\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eSteamboy's water maintenance FAQ gives the following guidance.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eThere is no fixed schedule for regularly replacing all the water.\u003c/p\u003e\n\u003cp\u003eSteamboy FAQ, “When should I top up or drain the water in a water-heated mat?”\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp\u003eDo not apply this statement directly to products from other manufacturers. The replacement guidance for your model takes priority. If no interval is given, contact customer support with the model name.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#checking-water-types-and-replacement-timing\" class=\"anchor\" id=\"checking-water-types-and-replacement-timing\"\u003e\u003c/a\u003eChecking Water Types and Replacement Timing\u003c/h2\u003e\n\u003cp\u003eCheck your model's manual to find out what water to use. The Steamboy FAQ allows bottled drinking water, tap water, and filtered water. It advises against using seawater, groundwater, or saline solution. Additives such as cleaning agents or fragrances must not be used either.\u003c/p\u003e\n\u003cp\u003eDo not decide how often to replace the water in your water-heated mat based on an individual's Q\u0026amp;A response. First, check whether the manual specifies a replacement interval. Read the filter replacement guidance separately as well. The Steamboy S8000 S manual says to replace the clean filter with a new one after 90 days (3 months) and notes that it is effective to change the water in the mat and boiler to fresh water at the same time.\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eCheck the manual for the types of water you can use.\u003c/li\u003e\n\u003cli\u003eLook for a specified interval for replacing all the water.\u003c/li\u003e\n\u003cli\u003eIf there is a filter, check the filter maintenance section too.\u003c/li\u003e\n\u003cli\u003eIf foreign matter keeps appearing, ask the manufacturer how to inspect the product.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp\u003eDo not add citric acid or detergent for cleaning on your own. Check whether the manufacturer allows the method you plan to use for internal cleaning. If a problem remains after replacing the water, have the product checked before restarting it.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#steps-for-draining-a-water-heated-mat\" class=\"anchor\" id=\"steps-for-draining-a-water-heated-mat\"\u003e\u003c/a\u003eSteps for Draining a Water-Heated Mat\u003c/h2\u003e\n\u003cp\u003eStop heating and let the water inside cool sufficiently before draining. Disconnecting a hose while the water is hot can cause burns. Manual and automatic drainage require different power settings.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#manual-drainage\" class=\"anchor\" id=\"manual-drainage\"\u003e\u003c/a\u003eManual Drainage\u003c/h3\u003e\n\u003cp\u003eCarry out manual drainage with the product unplugged. The instructions below are for Steamboy products that use an air pump. If your product has a different design, follow its model-specific manual.\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eTurn off the power and unplug the product.\u003c/li\u003e\n\u003cli\u003eLet the water in the boiler and mat cool sufficiently.\u003c/li\u003e\n\u003cli\u003ePlace a container to catch the water, then disconnect the hose from the boiler.\u003c/li\u003e\n\u003cli\u003eRemove the boiler's water cap and filter as instructed in the manual.\u003c/li\u003e\n\u003cli\u003eTilt or turn the main unit upside down in the specified direction to drain it.\u003c/li\u003e\n\u003cli\u003eLay the mat flat and connect the specified drainage tool.\u003c/li\u003e\n\u003cli\u003eFor models that use an air pump, pump air into the indicated opening.\u003c/li\u003e\n\u003cli\u003eCatch the water coming out of the other side in a container.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp\u003eIf the water does not drain easily, do not force it. Stop if you see damage to a connection. Ask the manufacturer's customer support about the drainage tool and the condition of the connections.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#automatic-drainage\" class=\"anchor\" id=\"automatic-drainage\"\u003e\u003c/a\u003eAutomatic Drainage\u003c/h3\u003e\n\u003cp\u003eFor automatic drainage, follow the button instructions and connection sequence for your model. Some products need to remain connected to power to run this function. Applying the manual drainage procedure as-is may prevent it from working.\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eStop heating and let the water inside cool sufficiently.\u003c/li\u003e\n\u003cli\u003ePrepare the dedicated drainage parts for the correct size.\u003c/li\u003e\n\u003cli\u003eCheck the required power state and connection sequence in the manual.\u003c/li\u003e\n\u003cli\u003eRun the drainage function as instructed.\u003c/li\u003e\n\u003cli\u003eOnce it finishes, handle any remaining water according to the manual.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2\u003e\n\u003ca href=\"#the-difference-between-turning-off-the-power-button-and-unplugging\" class=\"anchor\" id=\"the-difference-between-turning-off-the-power-button-and-unplugging\"\u003e\u003c/a\u003eThe Difference Between Turning Off the Power Button and Unplugging\u003c/h2\u003e\n\u003cp\u003eTurning off the power button is not the same as unplugging the product. On the Steamboy S8000 S, the drain button is used while the power is turned off. The instructions say to unplug the power cord when removing residual water from the boiler. Even on the same product, the required power state changes depending on the step.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTask\u003c/th\u003e\n\u003cth\u003ePower state to check\u003c/th\u003e\n\u003cth\u003eWhat to follow or confirm\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Task\"\u003eStopping heating and cooling\u003c/td\u003e\n\u003ctd data-label=\"Power state to check\"\u003eHeating function turned off\u003c/td\u003e\n\u003ctd data-label=\"What to follow or confirm\"\u003eConfirm that the water has cooled sufficiently\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Task\"\u003eManual drainage\u003c/td\u003e\n\u003ctd data-label=\"Power state to check\"\u003eProduct unplugged\u003c/td\u003e\n\u003ctd data-label=\"What to follow or confirm\"\u003eManual drainage instructions\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Task\"\u003eAutomatic drainage\u003c/td\u003e\n\u003ctd data-label=\"Power state to check\"\u003ePower connected as needed for operation\u003c/td\u003e\n\u003ctd data-label=\"What to follow or confirm\"\u003eAutomatic drainage instructions for that model\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Task\"\u003eRemoving residual water after drainage\u003c/td\u003e\n\u003ctd data-label=\"Power state to check\"\u003ePower disconnected as specified in the manual\u003c/td\u003e\n\u003ctd data-label=\"What to follow or confirm\"\u003eWhether automatic drainage has finished\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Task\"\u003eRefilling\u003c/td\u003e\n\u003ctd data-label=\"Power state to check\"\u003eModel-specific installation sequence\u003c/td\u003e\n\u003ctd data-label=\"What to follow or confirm\"\u003eWhether power is used during filling\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eBefore starting, mark the power-related instructions in the manual separately. The wording in the general FAQ may differ from the model's manual. If the order in which to apply the instructions is unclear, check with the manufacturer before proceeding.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#steps-for-reuse-after-long-term-storage\" class=\"anchor\" id=\"steps-for-reuse-after-long-term-storage\"\u003e\u003c/a\u003eSteps for Reuse After Long-Term Storage\u003c/h2\u003e\n\u003cp\u003eWhen reusing the product, inspect its exterior before adding water. Steamboy's storage FAQ advises checking the hoses and connectors for damage. After adding water, check for leaks too.\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eCheck the hoses and connectors for damage before connecting the power.\u003c/li\u003e\n\u003cli\u003eCheck that the power cord and plug are free of damage and moisture.\u003c/li\u003e\n\u003cli\u003eFollow the model's drainage instructions to handle any remaining water.\u003c/li\u003e\n\u003cli\u003eSpread out the mat and arrange the hoses so they are not kinked.\u003c/li\u003e\n\u003cli\u003eConnect the boiler and mat as instructed in the manual.\u003c/li\u003e\n\u003cli\u003eOperate the power controls in the sequence specified in the installation guide.\u003c/li\u003e\n\u003cli\u003eSlowly add an allowed type of water and stop at the specified water level.\u003c/li\u003e\n\u003cli\u003eClose the water cap and check for leaks at the connections and beneath the mat.\u003c/li\u003e\n\u003cli\u003eCheck whether the low-water signal and errors clear.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp\u003eTop up the water in your water-heated mat according to the signals specified for the model. The Steamboy FAQ advises against adding water just because the water-level indicator lights have decreased. This guidance concerns products that give both a low-water indication and an audible warning. If the signals continue after you have added enough water, stop adding more. The Steamboy S8000 S manual warns not to open the water cap while the boiler is operating except to add water when it runs low, because heated water can flow back and cause burns.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#examples-of-different-fill-volumes-for-the-same-queen-size\" class=\"anchor\" id=\"examples-of-different-fill-volumes-for-the-same-queen-size\"\u003e\u003c/a\u003eExamples of Different Fill Volumes for the Same Queen Size\u003c/h3\u003e\n\u003cp\u003eEven when the size is the same, the amount of water needed varies by model. The figures below are from the respective user manuals. They are not universal fill volumes to apply to other models.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c/th\u003e\n\u003cth\u003eSize category in the manual\u003c/th\u003e\n\u003cth\u003eWater fill volume\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Model\"\u003eSteamboy S8000 S\u003c/td\u003e\n\u003ctd data-label=\"Size category in the manual\"\u003eQueen\u003c/td\u003e\n\u003ctd data-label=\"Water fill volume\"\u003e1,300mL\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Model\"\u003eSteamboy SM60·SM65·SM67\u003c/td\u003e\n\u003ctd data-label=\"Size category in the manual\"\u003eQueen\u003c/td\u003e\n\u003ctd data-label=\"Water fill volume\"\u003e1,450mL\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eIf water is already left inside, do not add the full amount shown in the table. The total fill volume is different from the amount currently needed for topping up. When adding water, follow your model's water-level guidance and stop-filling signals.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#checks-before-storing-a-water-heated-mat\" class=\"anchor\" id=\"checks-before-storing-a-water-heated-mat\"\u003e\u003c/a\u003eChecks Before Storing a Water-Heated Mat\u003c/h2\u003e\n\u003cp\u003eBefore long-term storage, drain the boiler and mat and let them dry thoroughly. Steamboy advises leaving no water or moisture behind. Whether to fold or roll the mat depends on its type.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct category in the Steamboy FAQ\u003c/th\u003e\n\u003cth\u003eStorage method\u003c/th\u003e\n\u003cth\u003ePoints to watch\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Product category in the Steamboy FAQ\"\u003eBed mat\u003c/td\u003e\n\u003ctd data-label=\"Storage method\"\u003eFold with the sleeping surface and pattern facing outward\u003c/td\u003e\n\u003ctd data-label=\"Points to watch\"\u003ePrevent sharp kinks in the connecting hose\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Product category in the Steamboy FAQ\"\u003eCarpet mat\u003c/td\u003e\n\u003ctd data-label=\"Storage method\"\u003eRoll with the patterned side facing outward\u003c/td\u003e\n\u003ctd data-label=\"Points to watch\"\u003ePrevent kinks in the connecting hose\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Product category in the Steamboy FAQ\"\u003eAll types\u003c/td\u003e\n\u003ctd data-label=\"Storage method\"\u003eKeep away from moisture, direct sunlight, and heat sources\u003c/td\u003e\n\u003ctd data-label=\"Points to watch\"\u003eDo not place heavy objects on top\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eDo not apply these categories directly to products from other manufacturers. Check the storage instructions for your mat. Washing the cover and draining the inside are also separate maintenance tasks. Check the separate care label to see whether washing is allowed.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#when-to-stop-restarting-the-product-and-have-it-checked\" class=\"anchor\" id=\"when-to-stop-restarting-the-product-and-have-it-checked\"\u003e\u003c/a\u003eWhen to Stop Restarting the Product and Have It Checked\u003c/h2\u003e\n\u003cp\u003eIf there are leaks or recurring errors, stop using the product and contact the manufacturer. Do not assume it is operating normally just because you have replaced the water. On Steamboy's official store website, customer support links to product inquiries and after-sales service requests.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCondition found\u003c/th\u003e\n\u003cth\u003eNext action\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Condition found\"\u003eThe low-water indicator stays on despite sufficient water\u003c/td\u003e\n\u003ctd data-label=\"Next action\"\u003eStop adding water and check the model-specific error guidance\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Condition found\"\u003eWater leaks from a hose or connection\u003c/td\u003e\n\u003ctd data-label=\"Next action\"\u003eStop using the product and contact official after-sales service\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Condition found\"\u003eA connection is damaged or drainage is poor\u003c/td\u003e\n\u003ctd data-label=\"Next action\"\u003eDo not force it; ask about an inspection\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Condition found\"\u003eThe power section is wet or liquid has entered it\u003c/td\u003e\n\u003ctd data-label=\"Next action\"\u003eDo not touch the product, plug, or power cord; ask for help\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Condition found\"\u003eA burning smell, smoke, or abnormal overheating occurs\u003c/td\u003e\n\u003ctd data-label=\"Next action\"\u003eTurn off the power if it is safe to do so, and do not restart\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eWhen making an inquiry, provide both the model name and the displayed error. Noting where the leak occurs and the circumstances also helps with the assessment. Even after normal operation resumes, follow the manual's precautions against low-temperature burns. Water maintenance alone cannot prevent burns from prolonged contact.\u003c/p\u003e\n","tags":["Water leaks","Household essentials"],"faqs":[{"question":"Does all the water need to be replaced at set intervals?","answer":"Check the manual for the model you are using. The Steamboy water care FAQ states that there is no fixed interval for replacing all the water. Do not apply this guidance to products from other manufacturers."},{"question":"Does topping up the water count as replacing all of it?","answer":"Topping up means adding enough water to make up for what is missing. It is different from a complete water change, which involves draining the existing water and adding fresh water."},{"question":"Can I use tap water?","answer":"The Steamboy FAQ allows bottled water, tap water, and purified water. For products from other manufacturers, use the water permitted in the manual for that model."},{"question":"Can I add citric acid or detergent to remove scale?","answer":"First, check whether the manufacturer permits this method of internal cleaning. The Steamboy FAQ prohibits additives such as cleaning agents and fragrances."},{"question":"Do I always need to unplug the product before draining it?","answer":"Manual draining is done with the product unplugged. Some products need to be connected to power for automatic draining. Follow the power instructions for each step in your model's manual."},{"question":"Is draining complete once I empty the boiler?","answer":"Water may also remain inside the mat. Check the draining instructions for both the boiler and the mat. There may also be instructions for removing residual water after automatic draining."},{"question":"Can I add more water if the low-water indicator stays on?","answer":"If the indicator and warning sound continue even though there is enough water, stop adding water. Check for leaks and consult the error guidance for your model. If the issue persists, contact the manufacturer's after-sales service."},{"question":"Do products of the same size take the same amount of water?","answer":"It depends on the model. According to the Steamboy manual, the queen-size S8000 S takes 1,300mL. The queen-size SM60, SM65, and SM67 take 1,450mL."},{"question":"Can I fold the mat for storage after use?","answer":"It depends on the mat type and the instructions for the model. The Steamboy FAQ says to fold bed-type mats and roll up carpet-type mats. In both cases, make sure the connecting hose is not sharply bent."},{"question":"Can I turn on the power right away after the product has been stored for a long time?","answer":"First, check the hose and connections for damage. Also check the condition of the power cord and plug. If there are no problems, follow the installation and water-filling sequence in the manual."}],"sources":[{"url":"https://ssteamboy.com/article/faq/5/57921/page/2/","title":"Steamboy FAQ: How do I drain water from a water-heated mat? Published August 21, 2026","type":"source"},{"url":"https://ssteamboy.com/article/faq/5/27976/page/3/","title":"Steamboy FAQ: When should I refill or drain a water-heated mat?","type":"source"},{"url":"https://ssteamboy.com/article/faq/5/27978/page/3/","title":"Steamboy FAQ: What kind of water should I use in water-heated mats and water-based heating and cooling mats?","type":"source"},{"url":"https://ssteamboy.com/article/faq/5/27967/page/3/","title":"Steamboy FAQ: How should I store a water-heated mat for a long time?","type":"source"},{"url":"https://m.ssteamboy.com/exec/front/Board/download/?filename=S8000S_%EC%84%A4%EB%AA%85%EC%84%9C.pdf\u0026no=57801\u0026realname=2024/03/12/78efc9608d946593542b48455dd04292.pdf","title":"Steamboy S8000 S User Manual","type":"source"},{"url":"https://m.ssteamboy.com/exec/front/Board/download/?filename=SM67_%EC%84%A4%EB%AA%85%EC%84%9C_compressed.pdf\u0026no=57905\u0026realname=2024/03/12/46b00ac97db58f9daf695f7af888153a.pdf","title":"Steamboy SM60, SM65, and SM67 User Manual","type":"data_point"},{"url":"https://ssteamboy.com/board/faq/5/","title":"Steamboy Official Customer Support: Model-Specific Manuals, Error Guides, and After-Sales Service","type":"source"}],"images":[{"id":2298,"url":"https://injoys.com/rails/active_storage/blobs/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MzUyNTYsInB1ciI6ImJsb2JfaWQifX0=--4d62a386fc7761b2beecb2e32b294c3bc5408fa8/ai-52cc2dcc.webp","is_representative":true,"generation_method":"ai_photo","license":"ai_generated","mime_type":"image/webp","width":1536,"height":1024,"translations":{"ko":{"alt":"파란 스웨터를 입은 남성이 침대 옆에서 온수매트와 호스로 연결된 보일러에 물을 붓고 있다.","caption":"장기 보관 후 재사용할 때는 모델별 설명서에 따라 새 물을 채우세요.","description":null},"en":{"alt":"A man in a blue sweater pours water into a heated mattress pad’s boiler beside the bed.","caption":"Before reuse after long storage, refill with fresh water according to the model’s manual.","description":null},"ja":{"alt":"青いセーターを着た男性が、ベッド脇で温水マットにつながるボイラーに水を注いでいる。","caption":"長期保管後に再使用する際は、機種ごとの取扱説明書に従って新しい水を入れましょう。","description":null},"es":{"alt":"Un hombre con un suéter azul vierte agua en la caldera de un cubrecolchón de agua caliente junto a la cama.","caption":"Antes de reutilizarlo tras un almacenamiento prolongado, llénelo con agua nueva según el manual del modelo.","description":null},"id":{"alt":"Pria bersweter biru menuangkan air ke unit pemanas alas kasur air hangat di samping tempat tidur.","caption":"Sebelum digunakan kembali setelah lama disimpan, isi dengan air baru sesuai petunjuk untuk model tersebut.","description":null},"pt":{"alt":"Um homem de suéter azul despeja água na caldeira de um sobrecolchão de água quente ao lado da cama.","caption":"Antes de reutilizar após um longo período guardado, encha com água nova conforme o manual do modelo.","description":null},"zh-hant":{"alt":"一名穿著藍色毛衣的男子在床邊，將水倒入以軟管連接溫水床墊的加熱主機。","caption":"長期存放後再次使用前，請依該型號的使用說明書注入新水。","description":null},"de":{"alt":"Ein Mann im blauen Pullover füllt neben dem Bett Wasser in das Heizgerät einer Warmwasser-Matratzenauflage.","caption":"Füllen Sie nach längerer Lagerung vor der Wiederverwendung frisches Wasser gemäß der Anleitung des Modells ein.","description":null}}},{"id":2299,"url":"https://injoys.com/rails/active_storage/blobs/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MzUyNjIsInB1ciI6ImJsb2JfaWQifX0=--c854b234b127b7b717fb290fe0964fcb246a93e6/ai-6db94117.webp","is_representative":false,"generation_method":"ai_semi","license":"ai_generated","mime_type":"image/webp","width":1536,"height":1024,"translations":{"ko":{"alt":"여성이 초록색 온수매트 모서리를 들어 밑면과 흰 수건 위 호스 연결부를 살펴보는 모습","caption":"장기 보관 후에는 물을 채운 뒤 누수가 없는지 확인하고 재사용하세요.","description":null},"en":{"alt":"A woman lifts a green heated mat’s corner to inspect its underside and hose connection above a white towel.","caption":"After long storage, refill and check for leaks before resuming use.","description":null},"ja":{"alt":"緑の温水マットの端を持ち上げ、裏面と白いタオルの上のホース接続部を確認する女性","caption":"長期保管後は給水してから水漏れがないことを確認し、使用を再開しましょう。","description":null},"es":{"alt":"Una mujer levanta una esquina de una esterilla térmica verde y revisa la conexión sobre una toalla blanca.","caption":"Tras un almacenamiento prolongado, rellene y compruebe que no haya fugas antes de volver a usarla.","description":null},"id":{"alt":"Seorang wanita mengangkat sudut matras pemanas hijau dan memeriksa sambungan selang di atas handuk putih.","caption":"Setelah lama disimpan, isi kembali air dan periksa kebocoran sebelum digunakan lagi.","description":null},"pt":{"alt":"Uma mulher levanta o canto de um tapete térmico verde e verifica a conexão da mangueira sobre uma toalha branca.","caption":"Após um longo período guardado, reabasteça e verifique se há vazamentos antes de voltar a usar.","description":null},"zh-hant":{"alt":"一名女性掀起綠色溫水墊的一角，檢查底面及白色毛巾上方的水管接頭","caption":"長期收納後，應先加水並確認沒有漏水，再恢復使用。","description":null},"de":{"alt":"Eine Frau hebt die Ecke einer grünen Heizmatte an und prüft den Schlauchanschluss über einem weißen Handtuch.","caption":"Nach längerer Lagerung erst Wasser nachfüllen und vor der erneuten Nutzung auf Undichtigkeiten prüfen.","description":null}}}],"published_at":"2026-10-31T07:18:56+09:00","updated_at":"2026-10-31T08:56:28+09:00","license":"cc_by","translation_status":"reviewed","available_locales":["ko","en","ja","es"],"data_locales":["ko","en","ja","es","id","pt","zh-hant","de"],"url":"https://injoys.com/en/articles/hot-water-mat-water-change-storage-restart"}