{"product_id":"pentairwaterpoolandspainc_460747","title":"Pentair Tube Sheet Coil Assembly Kit for MasterTemp 250NA \/ 250LP | 460747","description":"\u003ch3\u003eOEM Tube Sheet Coil Assembly for MasterTemp 250 Heaters\u003c\/h3\u003e\n\n\u003cp\u003eThe Pentair 460747 is the OEM Tube Sheet Coil Assembly Kit for the MasterTemp 250NA (natural gas) and 250LP (liquid propane) pool and spa heaters. If your heater's heat exchanger section requires service, this is the manufacturer-specified replacement assembly for those models.\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 INSTALLATION 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 heat exchanger core of the MasterTemp heater's water system. Pool water passes through the coil while combustion gases transfer heat across the tube sheet, raising water temperature before it returns to the pool. A failed or leaking coil assembly results in water loss, reduced heating efficiency, or complete heater shutdown. Replacing this assembly restores the heater's water-side heat transfer function to OEM specification.\u003c\/p\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;\"\u003e460747\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePart Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eTube Sheet Coil Assembly Kit\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\u003eCatalog Reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e250K BFR 12\/09\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eCompatible Heater Models\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eMasterTemp 250NA, MasterTemp 250LP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePro Tip\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm the model number on your heater's rating plate matches 250NA or 250LP — the MasterTemp line spans multiple BTU ratings, and tube sheet coil assemblies are not interchangeable across sizes. Match the part number stamped on the original assembly to 460747 before adding to cart. Given the labour involved in accessing this assembly, inspect all adjacent gaskets and seals during the same service interval and replace any that show wear.\u003c\/p\u003e\n\n\u003c!-- wft:processed:manual:2026-04-06 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":53971915571475,"sku":"460747","price":999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/pentair-tube-sheet-coil-assembly-kit-for-mastertemp-250na-250lp-460747.webp?v=1789680925","url":"https:\/\/poolaroo.com\/products\/pentairwaterpoolandspainc_460747","provider":"Poolaroo","version":"1.0","type":"link"}