{"product_id":"pentair-heat-exchanger-kit-for-mastertemp-and-max-e-therm-400k-asme-474956","title":"Pentair Heat Exchanger Kit for MasterTemp and Max-E-Therm 400k ASME | 474956","description":"\u003ch2 data-start=\"277\" data-end=\"302\"\u003e\u003cstrong data-start=\"280\" data-end=\"300\"\u003eProduct Overview\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Sta-Rite Max-E-Therm 400 HD Natural Gas Heater SR400HD is a heavy-duty, high-performance pool and spa heater designed for fast heat-up, reliable operation, and long-lasting durability. With 400,000 BTUs of heating power, natural gas operation, and a cupro-nickel heat exchanger, this HD model is built for demanding residential pool and spa systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Max-E-Therm series is known for its compact footprint, lightweight design, digital controls, and rustproof exterior housing. The SR400HD is a strong option for larger pools, attached spas, and customers who want quick temperature recovery with added heat exchanger protection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eIdeal For\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLarge residential swimming pools\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePool and spa combination systems\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eNatural gas pool heating applications\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCustomers wanting fast pool heat-up\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAttached spas needing quick temperature recovery\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eHeavy-use pool and spa systems\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eEquipment pads with limited space\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCustomers wanting cupro-nickel heat exchanger durability\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e400,000 BTU natural gas heating performance\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eHeavy-duty HD model\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCupro-nickel heat exchanger for added durability\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e120\/240 VAC electrical capability\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e60 Hz operation\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDigital temperature controls\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eElectronic ignition with no standing pilot\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLow NOx heater design\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCompact, lightweight Max-E-Therm cabinet\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eRustproof Dura-Glas® exterior housing\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDesigned for fast pool and spa warm-up\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCompatible with many pool and spa automation systems\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eBenefits\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Sta-Rite Max-E-Therm SR400HD delivers powerful 400K BTU heating while offering added durability through its cupro-nickel heat exchanger. This makes it a strong choice for heavier-use systems, tougher water conditions, and pool owners who want a more durable heater option than a standard copper exchanger model.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIts compact, lightweight design helps simplify installation and replacement on many existing equipment pads. Digital controls make temperature adjustment easy, while the natural gas platform provides fast and dependable heating for pools and spas.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDetails\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSta-Rite \/ Pentair\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSeries\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMax-E-Therm HD\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePool and Spa Heater\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSR400HD\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSKU\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSR400HD\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBarcode\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e788379804084\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFuel Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNatural Gas\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBTU Rating\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e400,000 BTUs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eElectrical Requirement\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e120\/240 VAC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFrequency\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e60 Hz\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eApprox. Weight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e127 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHeat Exchanger\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCupro-Nickel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHeater Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eGas Pool \u0026amp; Spa Heater\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIgnition Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eElectronic Ignition\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eLow NOx\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHousing\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eRustproof Dura-Glas® Composite Housing\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eControl Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDigital Control Panel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eApplication\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eResidential pool and spa heating\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInstallation Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOutdoor or properly vented indoor installation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAutomation Compatible\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYes, with compatible pool automation systems\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInstallation\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eProfessional installation recommended\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCondition\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNew\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eCompatibility \u0026amp; Ordering Notes\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eConfirm this is the correct natural gas HD model before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eVerify that 400,000 BTUs is properly sized for the pool or spa application.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eConfirm gas line sizing, gas supply, electrical requirements, plumbing layout, venting requirements, equipment pad clearances, and local code requirements before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis model is not for propane systems. For propane applications, use the correct propane Max-E-Therm model.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eProfessional installation is strongly recommended.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eInstalled or used heaters may not be eligible for return.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eCustomer-Facing Q\u0026amp;A\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eQ: Is SR400HD natural gas or propane?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: SR400HD is the natural gas version of the Sta-Rite Max-E-Therm 400 HD heater.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eQ: How many BTUs is this heater?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: This heater is rated at 400,000 BTUs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eQ: What makes the HD model different?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: The HD model includes a cupro-nickel heat exchanger, which is designed for added durability in more demanding pool and spa applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eQ: Can this heater run on 120V or 240V?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes. This model is designed for 120\/240 VAC operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eQ: What is the barcode for SR400HD?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: The barcode is 788379804084.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eQ: Does this heater use a standing pilot?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: No. The Max-E-Therm uses electronic ignition and does not require a standing pilot light.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eQ: Is this heater good for large pools?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes. The 400K BTU size is a strong fit for large residential pools, attached spas, and pool\/spa combinations that need fast heat-up.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eQ: Is professional installation recommended?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes. Gas pool heaters should be installed by a qualified professional to ensure proper gas, electrical, plumbing, venting, and safety setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eQ: What should I verify before ordering?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Confirm fuel type, BTU sizing, gas supply, gas line sizing, electrical requirements, plumbing compatibility, venting requirements, installation clearances, and local code requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003c!--split--\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52762849476918,"sku":"PEN474956 -H","price":2499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/1167\/9798\/files\/474956_2000x2000_4835837a-1aff-43a8-8491-ea0b77ffae22.webp?v=1764613267","url":"https:\/\/poolsupplydepot.net\/products\/pentair-heat-exchanger-kit-for-mastertemp-and-max-e-therm-400k-asme-474956","provider":"Pool Supply Depot","version":"1.0","type":"link"}