{"product_id":"pentair-heat-exchanger-400k-hd-heaters-474065","title":"Pentair Heat Exchanger 400K Hd Heaters | 474065","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003ePentair Kit Htexch 400K HD Heaters Mfg | 474065\u003c\/strong\u003e is a genuine Pentair replacement \u003cstrong\u003eheat exchanger \/ tube sheet coil assembly kit\u003c\/strong\u003e designed for select \u003cstrong\u003e400K BTU heavy-duty pool and spa heaters\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis kit is commonly used on \u003cstrong\u003ePentair MasterTemp 400HDNA\u003c\/strong\u003e, \u003cstrong\u003eMasterTemp 400HD-LP\u003c\/strong\u003e, and compatible \u003cstrong\u003eSta-Rite Max-E-Therm 400 HD\u003c\/strong\u003e heater applications. It is specifically referenced for heaters manufactured \u003cstrong\u003eafter January 12, 2009\u003c\/strong\u003e, using the updated tube design.\u003c\/p\u003e\n\u003cp\u003eBuilt with \u003cstrong\u003ecupro-nickel construction\u003c\/strong\u003e, this heat exchanger kit is designed for enhanced corrosion resistance and durability in demanding pool and spa heating environments. It helps restore proper heat transfer, water flow through the exchanger, and overall heater performance when the original heat exchanger is leaking, scaled, corroded, cracked, or damaged.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eIdeal For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePentair MasterTemp 400K HD heater repairs\u003c\/li\u003e\n\u003cli\u003ePentair MasterTemp 400HDNA natural gas heaters\u003c\/li\u003e\n\u003cli\u003ePentair MasterTemp 400HD-LP propane heaters\u003c\/li\u003e\n\u003cli\u003eSta-Rite Max-E-Therm 400 HD heater applications\u003c\/li\u003e\n\u003cli\u003eReplacing leaking heat exchangers\u003c\/li\u003e\n\u003cli\u003eReplacing corroded or scaled tube sheet coil assemblies\u003c\/li\u003e\n\u003cli\u003eHeavy-duty pool and spa heater service repairs\u003c\/li\u003e\n\u003cli\u003eRestoring heater efficiency and heat transfer\u003c\/li\u003e\n\u003cli\u003ePool heater rebuilds\u003c\/li\u003e\n\u003cli\u003eProfessional pool heater service technicians\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Pentair replacement kit\u003c\/strong\u003e — OEM part designed for compatible Pentair and Sta-Rite 400K HD heater systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400K BTU HD heater compatibility\u003c\/strong\u003e — made for select heavy-duty 400K pool and spa heaters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCupro-nickel construction\u003c\/strong\u003e — provides enhanced resistance to corrosion, erosion, and harsh pool water conditions compared with standard copper.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube sheet coil assembly design\u003c\/strong\u003e — restores the heater’s internal water-to-heat transfer path.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor updated heater design\u003c\/strong\u003e — commonly referenced for compatible heaters manufactured after \u003cstrong\u003eJanuary 12, 2009\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits MasterTemp HD models\u003c\/strong\u003e — used with select MasterTemp 400HDNA and 400HD-LP heaters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Max-E-Therm HD models\u003c\/strong\u003e — used with compatible Sta-Rite Max-E-Therm 400 HD heaters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelps restore heater performance\u003c\/strong\u003e — improves heat transfer when the original exchanger is damaged or deteriorated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService repair solution\u003c\/strong\u003e — replaces the heat exchanger without replacing the entire heater when the rest of the unit is serviceable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional-grade heater component\u003c\/strong\u003e — intended for qualified pool heater technicians.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBenefits\u003c\/h2\u003e\n\u003cp\u003eThe Pentair 474065 heat exchanger kit helps bring compatible 400K HD heaters back to proper operating condition. A damaged heat exchanger can cause water leaks, poor heating, scale buildup, corrosion issues, overheating, or heater shutdowns.\u003c\/p\u003e\n\u003cp\u003eReplacing the heat exchanger with the correct OEM kit helps restore heat transfer efficiency and protects the heater from continued operation with a compromised exchanger. The cupro-nickel construction is a strong choice for heavy-duty heater applications and pool environments where durability is especially important.\u003c\/p\u003e\n\u003cp\u003eFor pool professionals, the 474065 kit is a major service part for repairing compatible MasterTemp and Max-E-Therm HD 400K heaters manufactured after the January 2009 design update.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003ePentair Kit Htexch 400K HD Heaters Mfg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003ePentair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelated Brand\u003c\/td\u003e\n\u003ctd\u003eSta-Rite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e474065\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e474065\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistributor \/ Store SKU Reference\u003c\/td\u003e\n\u003ctd\u003ePEN474065\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC \/ GTIN\u003c\/td\u003e\n\u003ctd\u003e788379792039\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePool heater heat exchanger kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComponent Type\u003c\/td\u003e\n\u003ctd\u003eTube sheet coil assembly kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater Size Compatibility\u003c\/td\u003e\n\u003ctd\u003e400K BTU HD heaters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCupro-nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Heater Series\u003c\/td\u003e\n\u003ctd\u003ePentair MasterTemp HD and Sta-Rite Max-E-Therm HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible MasterTemp Models\u003c\/td\u003e\n\u003ctd\u003e400HDNA, 400HD-LP, MT-400-NA-HD, MT-400-LP-HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Sta-Rite Models\u003c\/td\u003e\n\u003ctd\u003eSR400NAHD and compatible Max-E-Therm 400 HD models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturing Date Reference\u003c\/td\u003e\n\u003ctd\u003eFor compatible heaters manufactured after 1\/12\/2009\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Design Reference\u003c\/td\u003e\n\u003ctd\u003eNew \/ updated tube design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement References\u003c\/td\u003e\n\u003ctd\u003e6291-015, 633395, PUR-151-5065\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003ePool and spa heater repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater Fuel Type Compatibility\u003c\/td\u003e\n\u003ctd\u003eCompatible natural gas and propane HD heater models when model match is confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComplete Heater Included\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBurner Assembly Included\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManifold Included\u003c\/td\u003e\n\u003ctd\u003eOnly if supplied by manufacturer kit configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation Type\u003c\/td\u003e\n\u003ctd\u003eInternal heater service replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEquipment Category\u003c\/td\u003e\n\u003ctd\u003ePool heater replacement parts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM \/ Aftermarket\u003c\/td\u003e\n\u003ctd\u003eGenuine Pentair OEM replacement part\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfessional Installation Required\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSold As\u003c\/td\u003e\n\u003ctd\u003eKit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003ch2\u003eIncluded Components\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × Pentair 474065 heat exchanger \/ tube sheet coil assembly kit\u003c\/li\u003e\n\u003cli\u003eCoil sealing O-ring kit, where supplied by manufacturer packaging\u003c\/li\u003e\n\u003cli\u003eManufacturer-supplied service components as packaged\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eComplete heater, burner tray, gas valve, control board, manifold parts not included in the kit, sensors, gaskets beyond supplied kit contents, plumbing fittings, electrical components, and installation labor are sold separately unless specifically included by the supplier.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp\u003eThis kit is designed for select \u003cstrong\u003e400K BTU HD heater models\u003c\/strong\u003e only.\u003c\/p\u003e\n\u003cp\u003eCommon compatibility references include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePentair MasterTemp \u003cstrong\u003e400HDNA\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePentair MasterTemp \u003cstrong\u003e400HD-LP\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePentair \u003cstrong\u003eMT-400-NA-HD\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePentair \u003cstrong\u003eMT-400-LP-HD\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSta-Rite Max-E-Therm \u003cstrong\u003eSR400NAHD\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompatible Sta-Rite Max-E-Therm 400 HD heater water system applications\u003c\/li\u003e\n\u003cli\u003eHeaters manufactured \u003cstrong\u003eafter January 12, 2009\u003c\/strong\u003e with the updated tube design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways confirm the heater model number, fuel type, serial number, manufacturing date, heat exchanger design, and official parts diagram before ordering. This kit is not universal for all MasterTemp, Max-E-Therm, or 400K heaters.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThis heat exchanger kit must be installed by a qualified pool heater technician or licensed professional. Heater repairs involve gas, electrical, water, combustion, and safety systems that must be serviced correctly.\u003c\/p\u003e\n\u003cp\u003eBefore installation, turn off gas supply, electrical power, and pool circulation equipment. Confirm the heater is cool and fully depressurized before disassembly.\u003c\/p\u003e\n\u003cp\u003eAfter replacement, inspect and verify all seals, O-rings, water connections, sensors, gas connections, wiring, combustion chamber components, and water flow. The heater should be tested for leaks, proper ignition, correct temperature rise, and safe operation before being returned to service.\u003c\/p\u003e\n\u003cp\u003eWater chemistry must be maintained within recommended ranges to protect the cupro-nickel heat exchanger and prevent premature scale, corrosion, or erosion damage.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCustomer-Facing Q\u0026amp;A\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the Pentair 474065?\u003c\/strong\u003e\u003cbr\u003eA: It is a Pentair heat exchanger \/ tube sheet coil assembly kit for select 400K BTU HD pool and spa heaters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the SKU?\u003c\/strong\u003e\u003cbr\u003eA: The SKU is \u003cstrong\u003e474065\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the UPC \/ GTIN?\u003c\/strong\u003e\u003cbr\u003eA: The UPC \/ GTIN is \u003cstrong\u003e788379792039\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What heater models does this fit?\u003c\/strong\u003e\u003cbr\u003eA: It is commonly used with select Pentair MasterTemp 400HDNA, 400HD-LP, MT-400-NA-HD, MT-400-LP-HD, and compatible Sta-Rite Max-E-Therm 400 HD heaters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this for heaters made after January 12, 2009?\u003c\/strong\u003e\u003cbr\u003eA: Yes. This kit is commonly referenced for compatible HD heaters manufactured after \u003cstrong\u003e1\/12\/2009\u003c\/strong\u003e with the updated tube design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What material is the heat exchanger made from?\u003c\/strong\u003e\u003cbr\u003eA: This kit is commonly listed as \u003cstrong\u003ecupro-nickel\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this for natural gas or propane heaters?\u003c\/strong\u003e\u003cbr\u003eA: It can fit compatible HD natural gas and propane heater models when the exact model and part diagram match.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a complete heater?\u003c\/strong\u003e\u003cbr\u003eA: No. This is a heat exchanger \/ tube sheet coil assembly kit only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this fix a leaking heater?\u003c\/strong\u003e\u003cbr\u003eA: Yes, if the leak is caused by a failed heat exchanger and the heater model is compatible. Other components should also be inspected before repair.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can a homeowner install this kit?\u003c\/strong\u003e\u003cbr\u003eA: No. This part should be installed only by a qualified pool heater technician or licensed professional.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52762845118774,"sku":"PEN474065 -H","price":1769.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/1167\/9798\/files\/PEN474065_0.jpg?v=1755535854","url":"https:\/\/poolsupplydepot.net\/products\/pentair-heat-exchanger-400k-hd-heaters-474065","provider":"Pool Supply Depot","version":"1.0","type":"link"}