{"product_id":"pentairkit400asmepresvessel9bolt474956pen474956","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 data-start=\"303\" data-end=\"715\"\u003eThis Heat Exchanger Kit is engineered for use with Pentair MasterTemp® and Max-E-Therm® 400K ASME BTU heaters. It includes the complete tubesheet coil assembly, sealing O-rings, insulation components, and adapter plates required for full core replacement. Designed for heaters manufactured after the factory design change date, this kit helps restore peak heating performance and extend the life of the heater unit.\u003c\/p\u003e\n\u003chr data-start=\"717\" data-end=\"720\"\u003e\n\u003ch2 data-start=\"722\" data-end=\"740\"\u003e\u003cstrong data-start=\"725\" data-end=\"738\"\u003eIdeal For\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"741\" data-end=\"1223\"\u003e\n\u003cli data-start=\"741\" data-end=\"872\"\u003e\n\u003cp data-start=\"743\" data-end=\"872\"\u003eService technicians repairing a MasterTemp or Max-E-Therm 400K heater whose core tube assembly is leaking, corroded, or failed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"873\" data-end=\"994\"\u003e\n\u003cp data-start=\"875\" data-end=\"994\"\u003ePool owners seeking a cost-effective overhaul of their heater’s hydraulic core rather than replacing the entire unit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"995\" data-end=\"1099\"\u003e\n\u003cp data-start=\"997\" data-end=\"1099\"\u003eInstallations where water-side corrosion or scale buildup has compromised the heat exchanger tubing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1100\" data-end=\"1223\"\u003e\n\u003cp data-start=\"1102\" data-end=\"1223\"\u003eHeating systems where the heater cabinet, burner, blower and controls remain intact but the exchanger is the weak link.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1225\" data-end=\"1228\"\u003e\n\u003ch2 data-start=\"1230\" data-end=\"1251\"\u003e\u003cstrong data-start=\"1233\" data-end=\"1249\"\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"1252\" data-end=\"2045\"\u003e\n\u003cli data-start=\"1252\" data-end=\"1397\"\u003e\n\u003cp data-start=\"1254\" data-end=\"1397\"\u003e\u003cstrong data-start=\"1254\" data-end=\"1296\"\u003eComplete Coil \/ Tube-Sheet Replacement\u003c\/strong\u003e – provides a full core assembly rather than just partial parts, restoring full system performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1398\" data-end=\"1532\"\u003e\n\u003cp data-start=\"1400\" data-end=\"1532\"\u003e\u003cstrong data-start=\"1400\" data-end=\"1431\"\u003eIncludes Seals \u0026amp; Insulation\u003c\/strong\u003e – comes with O-rings, insulation kit and hardware to enable installation to factory specification.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1533\" data-end=\"1673\"\u003e\n\u003cp data-start=\"1535\" data-end=\"1673\"\u003e\u003cstrong data-start=\"1535\" data-end=\"1563\"\u003eOEM Fit for 400K Heaters\u003c\/strong\u003e – compatible with models of MasterTemp and Max-E-Therm rated at 400K BTU, produced after the design change.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1674\" data-end=\"1796\"\u003e\n\u003cp data-start=\"1676\" data-end=\"1796\"\u003e\u003cstrong data-start=\"1676\" data-end=\"1712\"\u003eHeavy-Duty Material Construction\u003c\/strong\u003e – built to withstand scale, corrosion and high-temperature water-flow conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1797\" data-end=\"1918\"\u003e\n\u003cp data-start=\"1799\" data-end=\"1918\"\u003e\u003cstrong data-start=\"1799\" data-end=\"1828\"\u003eCost-Saving Repair Option\u003c\/strong\u003e – enables major heater component refresh at a fraction of full system replacement cost.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1919\" data-end=\"2045\"\u003e\n\u003cp data-start=\"1921\" data-end=\"2045\"\u003e\u003cstrong data-start=\"1921\" data-end=\"1953\"\u003ePreserves Existing Equipment\u003c\/strong\u003e – keeps the original blower, burner assembly and wiring intact while refreshing the core.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2047\" data-end=\"2050\"\u003e\n\u003ch2 data-start=\"2052\" data-end=\"2080\"\u003e\u003cstrong data-start=\"2055\" data-end=\"2078\"\u003eCustomer-Facing Q\u0026amp;A\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"2081\" data-end=\"2356\"\u003e\u003cstrong data-start=\"2081\" data-end=\"2137\"\u003eQ: How do I know if this kit is right for my heater?\u003c\/strong\u003e\u003cbr data-start=\"2137\" data-end=\"2140\"\u003eA: This kit is designed for MasterTemp® and Max-E-Therm® 400K heaters. Confirm your heater’s model number, manufacture date or design revision (the “HD” or “9-bolt” version) before ordering to ensure compatibility.\u003c\/p\u003e\n\u003cp data-start=\"2358\" data-end=\"2571\"\u003e\u003cstrong data-start=\"2358\" data-end=\"2399\"\u003eQ: Does this replace my whole heater?\u003c\/strong\u003e\u003cbr data-start=\"2399\" data-end=\"2402\"\u003eA: No. It replaces the heat-exchanger or coil assembly inside your existing heater cabinet. The burner, blower and wiring remain in place if they are still functional.\u003c\/p\u003e\n\u003cp data-start=\"2573\" data-end=\"2735\"\u003e\u003cstrong data-start=\"2573\" data-end=\"2606\"\u003eQ: Is installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"2606\" data-end=\"2609\"\u003eA: It’s a technical repair—recommended for qualified technicians—with proper plumbing, wiring and pressure testing required.\u003c\/p\u003e\n\u003cp data-start=\"2737\" data-end=\"2929\"\u003e\u003cstrong data-start=\"2737\" data-end=\"2786\"\u003eQ: Will this improve my heater’s performance?\u003c\/strong\u003e\u003cbr data-start=\"2786\" data-end=\"2789\"\u003eA: Yes. A worn or corroded exchanger reduces system efficiency, so replacing it helps restore full heating capacity and proper water flow.\u003c\/p\u003e\n\u003cp data-start=\"2931\" data-end=\"3198\"\u003e\u003cstrong data-start=\"2931\" data-end=\"3004\"\u003eQ: What other maintenance should I consider when installing this kit?\u003c\/strong\u003e\u003cbr data-start=\"3004\" data-end=\"3007\"\u003eA: Inspect and clean burner assembly, ensure proper combustion, confirm water chemistry is addressed to prevent future corrosion, and verify all seals and insulation are properly installed.\u003c\/p\u003e\n\u003c!--split--\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52762849476918,"sku":"PEN474956 -H","price":2399.0,"currency_code":"USD","in_stock":true}],"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\/pentairkit400asmepresvessel9bolt474956pen474956","provider":"Pool Supply Depot","version":"1.0","type":"link"}