{"title":"Pentair AutoFill Automatic Water Filler Replacement Parts","description":"\u003cp\u003eInteractive exploded-view parts diagram for the Pentair AutoFill Automatic Water Filler. Click any numbered part to see the part number, price and stock, or call us and we will find it for you.\u003c\/p\u003e","products":[{"product_id":"pentair38mptbrassautofillfloatvalvet26pent26","title":"Pentair 3\/8″ MPT Brass Autofill Float Valve | T26","description":"\u003cdiv\u003e\n\u003ch2\u003ePentair T26 Brass 3\/8″ MPT Autofill Float Valve\u003c\/h2\u003e\n\u003cp\u003eThe Pentair T26 is a brass autofill float valve designed for automatic water-level control in pools and spas. It replaces or upgrades the float-valve assembly in autofill canisters, helping maintain proper water level without manual topping up.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3\/8″ male-pipe-thread (MPT) inlet — compatible with standard autofill canisters and plumbing fittings.\u003c\/li\u003e\n\u003cli\u003eDurable brass body — resistant to corrosion from pool chemicals and weather exposure for long-term reliability.\u003c\/li\u003e\n\u003cli\u003eSelf-adjusting float mechanism — automatically stops water flow once the water level reaches the preset height, preventing overflow.\u003c\/li\u003e\n\u003cli\u003eSimple replacement or upgrade option for existing autofill systems — installs directly with minimal plumbing or mechanical changes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer: Pentair\u003c\/li\u003e\n\u003cli\u003eModel \/ Part Number: T26\u003c\/li\u003e\n\u003cli\u003eConnection Type: 3\/8″ Male Pipe Thread (MPT)\u003c\/li\u003e\n\u003cli\u003eMaterial: Brass\u003c\/li\u003e\n\u003cli\u003eFunction: Automatic water-level maintenance \/ autofill float valve\u003c\/li\u003e\n\u003cli\u003eTypical Use: In-ground pools, spas, and pools equipped with automatic water filler systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen \u0026amp; Why to Use T26\u003c\/h3\u003e\n\u003cp\u003eUse the T26 float valve when you want to automate water-level maintenance — ideal if the pool water drops due to splashout, evaporation, or backwash procedures. It helps protect pool equipment (pumps, heaters, skimmers) from running low on water and reduces the need for frequent manual water top-offs.\u003c\/p\u003e\n\u003ch3\u003eInstallation \u0026amp; Maintenance Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShut off the water supply before installation to avoid leaks.\u003c\/li\u003e\n\u003cli\u003eEnsure the MPT connection threads are clean and properly sealed (use thread sealant or plumber’s tape if needed for a leak-free fit).\u003c\/li\u003e\n\u003cli\u003eAdjust the float height per instructions so the water level lands at the desired point after fill.\u003c\/li\u003e\n\u003cli\u003eTest the valve by triggering a refill after water loss (e.g. after backwash or splashout) — confirm that it shuts off correctly when water reaches the set level.\u003c\/li\u003e\n\u003cli\u003ePeriodically rinse and inspect the valve for mineral buildup or corrosion — replace if the float becomes stuck or leaks develop.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52335973335356,"sku":"T26","price":46.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/pentair-38-mpt-brass-autofill-float-valve-t26-miscellaneous-3111388.jpg?v=1765309746"},{"product_id":"pentairautofillwhitet40bwpent40bw","title":"Pentair Autofill White | T40BW","description":"\u003cdiv\u003e\n  \u003ch2\u003ePentair T40BW AutoFill Automatic Water Filler – White Lid with Side-Mounted Float Valve\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The \u003cstrong\u003ePentair T40BW\u003c\/strong\u003e AutoFill is an automatic pool \u003cstrong\u003ewater level control\u003c\/strong\u003e designed for standard in-ground pools.\n    It uses a simple, reliable \u003cstrong\u003eside-mounted float valve\u003c\/strong\u003e to monitor the pool’s water level and add water as needed, helping prevent\n    low-water conditions that can lead to pump damage, loss of prime, and poor skimmer performance.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e T40BW\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Automatic water filler \/ water leveler (AutoFill)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFloat Valve:\u003c\/strong\u003e Side-mounted float valve (mechanical level control)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLid Color:\u003c\/strong\u003e White\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePurpose:\u003c\/strong\u003e Maintains a more consistent pool water level automatically\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhy This Part Matters\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHelps protect pumps and skimmers from running under low-water conditions\u003c\/li\u003e\n    \u003cli\u003eReduces day-to-day manual topping off (especially during hot, windy, or dry weather)\u003c\/li\u003e\n    \u003cli\u003eHelps keep skimming and cleaner performance consistent by maintaining proper waterline height\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Reasons to Replace\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eAutoFill no longer shuts off reliably (overfilling)\u003c\/li\u003e\n    \u003cli\u003eAutoFill no longer opens when the water drops (low water level issues)\u003c\/li\u003e\n    \u003cli\u003eCracked housing or damaged lid\/deck components\u003c\/li\u003e\n    \u003cli\u003eFloat valve sticks, leaks, or is worn from age or debris\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eTypically installed in the deck near the pool, tied into a dedicated water supply line.\u003c\/li\u003e\n    \u003cli\u003eWater level is adjusted by setting the float height per the unit’s adjustment mechanism.\u003c\/li\u003e\n    \u003cli\u003eFor best results, verify you have a proper overflow\/drain path so the pool cannot overfill during heavy rain or a valve issue.\u003c\/li\u003e\n    \u003cli\u003eIf you are not familiar with plumbing local code requirements, installation is best handled by a qualified pool professional.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pentair%20T40BW\"\u003eSearch: Pentair T40BW\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pentair%20autofill\"\u003eSearch: Pentair AutoFill\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=automatic%20water%20filler\"\u003eSearch: Automatic Water Fillers\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pool%20water%20leveler\"\u003eSearch: Pool Water Levelers\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=overflow%20drain%20fitting\"\u003eSearch: Pool Overflow \/ Drain Fittings\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=silicone%20pool%20lube\"\u003eSearch: Silicone Pool Lubricant\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation \u0026amp; Maintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCheck the AutoFill canister periodically and remove leaves\/sand that can interfere with float movement.\u003c\/li\u003e\n    \u003cli\u003eIf the unit is slow to fill, confirm your supply valve is fully open and the supply line\/strainer (if used) is not clogged.\u003c\/li\u003e\n    \u003cli\u003eIf the unit overfills, shut off the supply line and inspect for a stuck float or debris in the valve.\u003c\/li\u003e\n    \u003cli\u003eKeep your pool waterline in the recommended range for proper skimmer function—consistent water level improves circulation and surface cleaning.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52589955711292,"sku":"T40BW","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/pentair-autofill-white-t40bw-autofill-1345329.jpg?v=1770941180"},{"product_id":"pentairautofillgrayt40bgpent40bg","title":"Pentair Autofill Gray | T40BG","description":"\u003cdiv\u003e\n  \u003ch2\u003ePentair T40BG AutoFill Automatic Water Filler with Side-Mounted Float Valve (Gray)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Pentair T40BG AutoFill is an in-deck automatic water leveler designed to maintain a consistent pool or spa water level using a\n    simple, reliable float mechanism (no electronic controls). When the water level drops below your set point, the float valve opens to\n    add water until the proper level is restored. If the level rises too high, the built-in overflow helps remove excess water to reduce\n    overfilling and water waste.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAutomatic water level control:\u003c\/strong\u003e Helps keep water at a steady operating level for reliable skimming and circulation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSide-mounted float valve:\u003c\/strong\u003e Mechanical float design meters in water as needed without electronics.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBuilt-in overflow:\u003c\/strong\u003e Helps protect against overfilling and related water waste.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCompact housing:\u003c\/strong\u003e Approximately 7\" diameter deck canister fits many new builds and renovations.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurable construction:\u003c\/strong\u003e Corrosion- and chemical-resistant ABS polymer body designed for outdoor pool environments.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Gray lid\/ring (T40BG).\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Applications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eIn-ground pools and spas where maintaining a consistent water level protects equipment and improves day-to-day operation\u003c\/li\u003e\n    \u003cli\u003eNew construction and remodels requiring a compact in-deck autofill canister\u003c\/li\u003e\n    \u003cli\u003eInstallations where a non-electronic, mechanical water leveler is preferred\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eHow It Works\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eAs the pool water level drops, the float lowers and opens the fill valve to add make-up water.\u003c\/li\u003e\n    \u003cli\u003eOnce the set level is reached, the float rises and closes the valve to stop filling.\u003c\/li\u003e\n    \u003cli\u003eIf water rises above the normal level, the overflow pathway helps carry away excess water.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eWater level no longer holds steady (valve won’t open\/close consistently)\u003c\/li\u003e\n    \u003cli\u003eContinuous filling or frequent overfilling\u003c\/li\u003e\n    \u003cli\u003eCracked canister, damaged lid, or worn internal float\/valve components\u003c\/li\u003e\n    \u003cli\u003eSticking float or debris-related valve issues that return soon after cleaning\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eConfirm your desired set waterline height and orient the side-mounted float so it moves freely without contacting the canister walls.\u003c\/li\u003e\n    \u003cli\u003eUse a proper backflow prevention method per local code on the water supply line to the autofill.\u003c\/li\u003e\n    \u003cli\u003eAfter installation, test fill shutoff and overflow operation before leaving the system unattended.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eMaintenance Tip\u003c\/h3\u003e\n  \u003cp\u003e\n    Periodically remove the lid and check for debris, scale, or insects that can restrict float movement. If you notice the pool filling\n    more than usual, inspect for leaks in the pool system and verify the float valve is sealing fully when the target level is reached.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eRelated Products (Aqua Pool Supply)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pentair%20autofill%20parts\"\u003ePentair AutoFill replacement parts\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=autofill%20float%20valve\"\u003eAutoFill float valves\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=autofill%20lid\"\u003eAutoFill lids and rings\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pool%20backflow%20preventer\"\u003ePool backflow preventers\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pool%20water%20leveler\"\u003eAutomatic pool water levelers\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52589965803836,"sku":"T40BG","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/pentair-autofill-gray-t40bg-autofill-1362801.jpg?v=1770213924"},{"product_id":"pentairautofillalmdt40bbepent40bbe","title":"Pentair Autofill Almond | T40BBE","description":"\u003cdiv\u003e\n\u003ch1\u003ePentair Automatic Water Filler, Almond | T40BBE\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003ePentair T40BBE Automatic Water Filler\u003c\/strong\u003e is designed to maintain a consistent water level in in-ground pools and spas, helping protect pool equipment and reduce the need for manual refilling. This unit uses a mechanical float system to automatically add water when levels drop, ensuring proper skimmer operation and preventing damage caused by low water conditions.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAutomatically maintains proper pool or spa water level\u003c\/li\u003e\n\u003cli\u003eMechanical float operation with no electrical components\u003c\/li\u003e\n\u003cli\u003eHelps protect pumps and skimmers from running dry\u003c\/li\u003e\n\u003cli\u003ePrevents overfilling and unnecessary water waste\u003c\/li\u003e\n\u003cli\u003eDurable, chemical-resistant housing for long service life\u003c\/li\u003e\n\u003cli\u003eAlmond-colored lid blends well with common pool deck finishes\u003c\/li\u003e\n\u003cli\u003eDesigned for use in in-ground pools and spas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer: Pentair\u003c\/li\u003e\n\u003cli\u003eModel Number: T40BBE\u003c\/li\u003e\n\u003cli\u003eApplication: In-ground pools and spas\u003c\/li\u003e\n\u003cli\u003eOperation: Mechanical float-controlled valve\u003c\/li\u003e\n\u003cli\u003eColor: Almond\u003c\/li\u003e\n\u003cli\u003eBody Material: Corrosion-resistant polymer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation \u0026amp; Use\u003c\/h2\u003e\n\u003cp\u003eThe Pentair T40BBE is typically installed at deck level and connected to a pressurized water supply line. When the pool water level drops below the preset point, the internal float opens the valve to add water until the correct level is restored.\u003c\/p\u003e\n\u003ch2\u003eMaintenance Tips\u003c\/h2\u003e\n\u003cp\u003eInspect the float mechanism periodically for debris, scale buildup, or restricted movement. Keeping the valve clean and ensuring smooth float operation will help maintain reliable automatic filling and extend the life of the unit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52589980385596,"sku":"T40BBE","price":124.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/pentair-autofill-almond-t40bbe-autofill-1803565.jpg?v=1768324988"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/collections\/pentair-autofill-automatic-water-filler-autofill.png?v=1790364963","url":"https:\/\/aquapoolsupply.com\/collections\/parts-list-pentair-autofill-automatic-water-filler.oembed","provider":"Aqua Pool Supply","version":"1.0","type":"link"}