{"product_id":"pentair_474061","title":"Pentair Tube Sheet Coil Assembly Kit 400K BTU | MasterTemp \u0026 Max-E-Therm | 474061","description":"\u003cp\u003eThe Pentair Tube Sheet Coil Assembly Kit (474061) is the OEM replacement heat exchanger assembly for the MasterTemp 400 and Max-E-Therm 400 gas heaters. This kit provides everything needed for a complete tube sheet and coil service, including the coil assembly, seals, O-rings, insulation, gaskets, bypass valve, and ignitor components.\u003c\/p\u003e\n\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\n\u003cstrong\u003e⚠️ IMPORTANT: THIS IS A COMPLETE KIT — NOT AN INDIVIDUAL COIL ASSEMBLY\u003c\/strong\u003e\u003cbr\u003e\nPart 474061 is sold as a multi-piece service kit. It includes the tube sheet coil assembly plus associated O-rings, seals, gaskets, insulation, bypass valve package, RTV silicone, and ignitor kit. Review the full kit contents below before ordering.\n\u003c\/p\u003e\n\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\n\u003cstrong\u003e⚠️ IMPORTANT: MAX-E-THERM 400 DATE RANGE RESTRICTION\u003c\/strong\u003e\u003cbr\u003e\nThis kit is confirmed for Max-E-Therm 400 (NA\/LP) heaters manufactured after January 12, 2009. If your Max-E-Therm 400 was manufactured before that date, verify this part number against your equipment's serial plate and service manual before ordering.\n\u003c\/p\u003e\n\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\n\u003cstrong\u003e⚠️ IMPORTANT: LICENSED PROFESSIONAL REQUIRED\u003c\/strong\u003e\u003cbr\u003e\nGas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high-voltage components without proper certification.\n\u003c\/p\u003e\n\n\u003cp\u003eThe tube sheet coil assembly is the core heat exchanger in Pentair's MasterTemp and Max-E-Therm 400K BTU heaters. Unlike straight, flat heat exchangers found in many other heaters, Pentair's design uses a rounded coil configuration — a distinguishing characteristic of this heater family. A degraded or leaking tube sheet coil results in loss of heating efficiency, water contamination of the combustion chamber, or visible water leakage at the heat exchanger. Replacing this assembly restores the heater to OEM thermal performance specifications.\u003c\/p\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Tube Sheet Coil Assembly\u003c\/li\u003e\n  \u003cli\u003e8 × O-Ring, Coil\u003c\/li\u003e\n  \u003cli\u003e8 × Tube Sheet Seal\u003c\/li\u003e\n  \u003cli\u003e1 × O-Ring, Metal Tube Replacement\u003c\/li\u003e\n  \u003cli\u003e1 × Manifold Bypass Valve Package\u003c\/li\u003e\n  \u003cli\u003e1 × Blower\/Adapter Plate Gasket\u003c\/li\u003e\n  \u003cli\u003e1 × Ignitor and Gasket Kit\u003c\/li\u003e\n  \u003cli\u003e1 × Service Kit Insulation (Wool)\u003c\/li\u003e\n  \u003cli\u003e1 × High-Temp RTV Silicone\u003c\/li\u003e\n  \u003cli\u003e1 × Label, Sheet Metal Warning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePentair Part Number\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e474061\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eQuantity Included\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eKit (see Kit Contents above)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eTube Sheet Plate Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e5-1\/2\" W × 8-1\/2\" H\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eCoil Width (Side to Side)\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eApprox. 13\"\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eCoil Length (Plate to Opposite End)\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eApprox. 15\"\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eCompatible Heater BTU Rating\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e400,000 BTU\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eFuel Type Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eNatural Gas (NA) and Liquid Propane (LP)\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFits Into\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eEquipment Line\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eModel \/ Part Number\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eMasterTemp Heater (MasterTemp Series)\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e400NA\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eIncludes Item No. 3\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eMasterTemp Heater (MasterTemp Series)\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e400LP\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eIncludes Item No. 3\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eMax-E-Therm 400 (Max-E-Therm Series)\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eMAX-E-THERM-400-NA\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eNA\/LP Series 400 Models. For heaters manufactured after 1\/12\/09. Verify fitment before ordering.\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eCompatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003ePro Tip\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, locate the model number and manufacture date on the rating plate inside the heater cabinet. For MasterTemp 400 units, confirm NA (natural gas) or LP (propane) designation matches your fuel supply — both variants use this same kit. For Max-E-Therm 400 owners, the manufacture date on the serial plate must be after January 12, 2009 for this kit to apply. When servicing the tube sheet, use the included high-temp RTV silicone and follow Pentair's installation manual torque specifications for the tube sheet fasteners to ensure a proper seal.\u003c\/p\u003e\u003c!-- wft:processed:manual:2026-03-30 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":53912381915411,"sku":"474061","price":1326.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/PEN474061_0.jpg?v=1772793728","url":"https:\/\/poolaroo.com\/products\/pentair_474061","provider":"Poolaroo","version":"1.0","type":"link"}