{"product_id":"pentairwaterpoolandspainc_77707-1341","title":"Pentair Natural Gas to Propane Conversion Kit for Max-E-Therm 400K BTU | 77707-1341","description":"\u003cp\u003eThe Pentair 77707-1341 is the OEM Natural Gas to Propane (NG to LP) Conversion Kit for the Max-E-Therm 400,000 BTU gas heater — originally manufactured under the Sta-Rite brand, now part of the Pentair portfolio. If your Max-E-Therm 400 is currently configured for natural gas and you need to switch to propane supply, this is the factory-specified conversion kit for that model.\u003c\/p\u003e\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\u003cstrong\u003e⚠️ IMPORTANT: THIS IS A KIT — NOT A SINGLE COMPONENT\u003c\/strong\u003e\u003cbr\u003eThis listing is a complete conversion kit containing multiple components required to convert the Max-E-Therm 400 from natural gas to propane operation. All components in the kit are required for a proper conversion — do not substitute individual pieces.\u003c\/p\u003e\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\u003cstrong\u003e⚠️ IMPORTANT: LICENSED PROFESSIONAL INSTALLATION REQUIRED\u003c\/strong\u003e\u003cbr\u003eGas 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.\u003c\/p\u003e\n\u003cp\u003eThis conversion kit provides the components necessary to reconfigure the Max-E-Therm 400,000 BTU heater's gas valve and orifice assembly from natural gas to liquid propane (LP) operation. Natural gas and propane operate at different pressures and require different orifice sizing — using the wrong fuel type without a proper conversion kit can result in unsafe operation or equipment damage. This kit ensures the heater is correctly configured for propane supply at the factory-specified settings for the 400K BTU model.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctbody\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;\"\u003e77707-1341\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eAlso Known As \/ Legacy Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eSta-Rite (now Pentair) Max-E-Therm NG to LP Conversion 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\u003eFuel Conversion\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eNatural Gas (NG) to Liquid Propane (LP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eCompatible Heater Output\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\u003eQuantity Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eKit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePro Tip\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm your Max-E-Therm heater's current fuel configuration and BTU rating on the heater's data plate — this kit is specific to the 400,000 BTU model and the NG-to-LP conversion direction only. A separate kit is required if your heater is already configured for propane and you are converting back to natural gas. Have a licensed pool or HVAC technician verify the complete conversion against the Max-E-Therm installation manual before returning the heater to service.\u003c\/p\u003e\n\u003c!-- wft:processed:manual:2026-04-06 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":53980251390227,"sku":"77707-1341","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/pentair-natural-gas-to-propane-conversion-kit-max-e-therm-400k-btu-77707-1341.webp?v=1789689485","url":"https:\/\/poolaroo.com\/products\/pentairwaterpoolandspainc_77707-1341","provider":"Poolaroo","version":"1.0","type":"link"}