{"product_id":"sw-41-120-master-temp-manifold-o-rings","title":"Swimables SW-41-120 MasterTemp \u0026 Max-E-Therm Manifold O-Ring Kit","description":"\u003ch2\u003eKey Benefits + Heater Compatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacement manifold O-ring kit for compatible MasterTemp and Max-E-Therm style pool heaters.\u003c\/li\u003e\n\u003cli\u003eSwimables manufacturer part number SW-41-120.\u003c\/li\u003e\n\u003cli\u003eCross-references industry\/OEM part 77707-0120.\u003c\/li\u003e\n\u003cli\u003ePublished kit descriptions include one rectangular manifold O-ring and 12 smaller O-rings for manifold service.\u003c\/li\u003e\n\u003cli\u003eDesigned to replace manifold sealing components during heater repair or maintenance when the original O-rings are worn, flattened, cracked, or damaged.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuick Product Summary\u003c\/h2\u003e\u003cp\u003eThe Swimables SW-41-120 is a replacement manifold O-ring kit for compatible MasterTemp and Max-E-Therm style pool heaters. Swimables cross-references SW-41-120 to industry part 77707-0120. Published distributor descriptions identify the kit as containing one rectangular manifold O-ring plus 12 smaller O-rings used during manifold service. Before ordering, verify the heater model and original manifold O-ring part number to confirm fitment.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMasterTemp and Max-E-Therm style heater manifold service\u003c\/li\u003e\n\u003cli\u003eReplacing worn or damaged manifold sealing O-rings\u003c\/li\u003e\n\u003cli\u003eHeater repairs where the existing O-rings have been disturbed during disassembly\u003c\/li\u003e\n\u003cli\u003ePool professionals matching replacement seals by SW-41-120 or 77707-0120\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy This Matters\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManifold O-rings seal heater water-path connections and help prevent leakage at serviced joints.\u003c\/li\u003e\n\u003cli\u003eFlattened, cracked, hardened, pinched, or damaged O-rings may not reseal correctly after disassembly.\u003c\/li\u003e\n\u003cli\u003eUsing the correct replacement seal set helps restore the intended manifold sealing points.\u003c\/li\u003e\n\u003cli\u003eMatching the heater model and part number before ordering helps reduce fitment mistakes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Signs You Need This \/ Use This When\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThe heater manifold has been removed for service and the original O-rings should not be reused.\u003c\/li\u003e\n\u003cli\u003eAn existing manifold O-ring is cracked, flattened, hardened, stretched, pinched, or otherwise damaged.\u003c\/li\u003e\n\u003cli\u003eYour heater parts documentation calls for 77707-0120.\u003c\/li\u003e\n\u003cli\u003eYou are servicing a compatible MasterTemp or Max-E-Therm style manifold assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSwimables\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003eSW-41-120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eHeater manifold O-ring kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater Style \/ Application\u003c\/td\u003e\n\u003ctd\u003eMasterTemp and Max-E-Therm style pool heaters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndustry \/ OEM Cross-Reference\u003c\/td\u003e\n\u003ctd\u003e77707-0120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePublished Kit Contents\u003c\/td\u003e\n\u003ctd\u003e1 rectangular manifold O-ring and 12 small O-rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC \/ GTIN\u003c\/td\u003e\n\u003ctd\u003e810108820413\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eCompatibility \/ Fitment Notes\u003c\/h2\u003e\u003cp\u003eSwimables lists SW-41-120 as a MasterTemp \/ Max-E-Therm style manifold O-ring and cross-references industry part 77707-0120. Verify the exact heater model and original part number before ordering. Do not select heater manifold seals by appearance alone because similar O-rings can differ in size, material, and application.\u003c\/p\u003e\u003ch2\u003eInstallation \/ Use Notes\u003c\/h2\u003e\u003cp\u003eShut the heater and circulation system down and follow the heater manufacturer's service procedures before opening the water manifold. Allow the heater to cool, relieve system pressure, and disconnect power as required by the service instructions. Remove the old seals, clean the O-ring grooves and mating surfaces, inspect for damage, and install the replacement O-rings without twisting or pinching them. Use only lubricant approved for the heater seals if the manufacturer calls for lubrication, then reassemble and leak-test according to the heater manufacturer's instructions.\u003c\/p\u003e\u003ch2\u003eBuy with Confidence\u003c\/h2\u003e\u003cp\u003eBenchmark Pool Supply helps homeowners and pool professionals identify heater replacement parts using manufacturer numbers, OEM cross-references, equipment family, and practical service knowledge. For SW-41-120, matching 77707-0120 and your exact MasterTemp or Max-E-Therm style heater before ordering is the best way to reduce fitment mistakes.\u003c\/p\u003e","brand":"Swimables","offers":[{"title":"Default Title","offer_id":43722560471114,"sku":"Sw-41-120","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/6580\/7178\/files\/206_35_679939c12dbe97.91020550_Main_20Image_20SW-41-120_20_281_29_large_4c6d51a4-15a2-4f27-8145-c0207a244251.webp?v=1787350216","url":"https:\/\/benchmarkpoolsupply.com\/products\/sw-41-120-master-temp-manifold-o-rings","provider":"Benchmark Pool Supply","version":"1.0","type":"link"}