{"product_id":"pentair-460736-mastertemp-400k-btu-natural-gas-pool-spa-heater-high-performance-heating","title":"Pentair 460736 MasterTemp 400K BTU Natural Gas Pool \u0026 Spa Heater – High-Performance Heating","description":"\u003cp data-start=\"594\" data-end=\"996\"\u003eThe \u003cstrong data-start=\"598\" data-end=\"666\"\u003ePentair MasterTemp 460736 400K BTU Natural Gas Pool \u0026amp; Spa Heater\u003c\/strong\u003e is engineered for \u003cstrong data-start=\"685\" data-end=\"742\"\u003emaximum heating power and industry-leading efficiency\u003c\/strong\u003e, making it ideal for large residential pools, spas, and high-demand installations. With its \u003cstrong data-start=\"835\" data-end=\"853\"\u003ecompact design\u003c\/strong\u003e, \u003cstrong data-start=\"855\" data-end=\"877\"\u003efast heat-up times\u003c\/strong\u003e, and \u003cstrong data-start=\"883\" data-end=\"907\"\u003eefficient combustion\u003c\/strong\u003e, MasterTemp delivers commercial-grade heating performance without the bulky footprint.\u003c\/p\u003e \u003cp data-start=\"998\" data-end=\"1300\"\u003eA durable, corrosion-resistant exterior protects the unit in harsh outdoor environments, while easy-access digital controls simplify operation and diagnostics. Quiet performance, reliable ignition, and built-in safety features make the MasterTemp 400K one of the most trusted heaters in the industry.\u003c\/p\u003e \u003ch3 data-start=\"1307\" data-end=\"1330\"\u003e\u003cstrong data-start=\"1311\" data-end=\"1328\"\u003eCompatibility\u003c\/strong\u003e\u003c\/h3\u003e \u003cul data-start=\"1331\" data-end=\"1707\"\u003e \u003cli data-start=\"1331\" data-end=\"1394\"\u003e \u003cp data-start=\"1333\" data-end=\"1394\"\u003eDesigned for \u003cstrong data-start=\"1346\" data-end=\"1373\"\u003ein-ground pools and spas\u003c\/strong\u003e using natural gas.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1395\" data-end=\"1472\"\u003e \u003cp data-start=\"1397\" data-end=\"1472\"\u003eWorks with \u003cstrong data-start=\"1408\" data-end=\"1444\"\u003estandard 2” plumbing connections\u003c\/strong\u003e across most pool systems.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1473\" data-end=\"1568\"\u003e \u003cp data-start=\"1475\" data-end=\"1568\"\u003eFully compatible with \u003cstrong data-start=\"1497\" data-end=\"1554\"\u003ePentair IntelliCenter®, EasyTouch®, and IntelliTouch®\u003c\/strong\u003e automation.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1569\" data-end=\"1707\"\u003e \u003cp data-start=\"1571\" data-end=\"1707\"\u003eSuitable as a \u003cstrong data-start=\"1585\" data-end=\"1607\"\u003edirect replacement\u003c\/strong\u003e for MasterTemp, Max-E-Therm, and many competitor heater models with minimal plumbing adjustments.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSupplied under part number 460736 for exact-match ordering.\u003c\/li\u003e\n\u003cli\u003eBTU rating: 400K BTU.\u003c\/li\u003e\n\u003cli\u003eSized by BTU output — match the rating and fuel type to your existing unit.\u003c\/li\u003e\n\u003cli\u003eShips from our US warehouse with tracking on dispatch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Pentair\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 460736\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Pool Heaters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBTU rating:\u003c\/strong\u003e 400K BTU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC \/ GTIN:\u003c\/strong\u003e 788379724078\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping weight:\u003c\/strong\u003e 160 lb\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat part number is this pool heater?\u003c\/h3\u003e\u003cp\u003eThis item is supplied under part number 460736. Match that number against your equipment's parts diagram before ordering.\u003c\/p\u003e\u003ch3\u003eDoes the BTU rating have to match my old heater?\u003c\/h3\u003e\u003cp\u003eThe BTU rating should match or exceed your previous heater. Undersizing means the pool never reaches temperature on cold days; oversizing costs more up front but heats faster and cycles less.\u003c\/p\u003e\u003ch3\u003eCan this run on propane instead of natural gas?\u003c\/h3\u003e\u003cp\u003eNo. Gas pool heaters are built for one fuel and require a manufacturer conversion kit to change. Check the data plate on your existing unit and order the matching fuel type.\u003c\/p\u003e\u003ch3\u003eWhat size heater do I need for my pool?\u003c\/h3\u003e\u003cp\u003eA common rule is 1 BTU per gallon as a minimum, increased for windy sites, uncovered pools, or cold climates. A 20,000 gallon pool typically starts at 250,000 BTU.\u003c\/p\u003e\u003ch3\u003eDo I need a professional to install a pool heater?\u003c\/h3\u003e\u003cp\u003eGas heaters involve gas line sizing, venting and electrical connections, and most jurisdictions require a licensed installer plus a permit. Improper installation voids the manufacturer warranty.\u003c\/p\u003e\u003ch3\u003eHow do I confirm this part fits my equipment?\u003c\/h3\u003e\u003cp\u003eCheck the part number stamped on the component you are replacing, or find it on the parts schematic in your owner's manual. If the number differs or is unreadable, send us your equipment model and serial number and we will verify fitment before you order.\u003c\/p\u003e\u003ch3\u003eHow quickly does this ship?\u003c\/h3\u003e\u003cp\u003eIn-stock items ship from our US warehouse on business days. You will receive tracking by email once the order leaves the warehouse.\u003c\/p\u003e\u003ch3\u003eCan I return it if I ordered the wrong part?\u003c\/h3\u003e\u003cp\u003eUnopened, uninstalled items can be returned within 30 days. Equipment that has been installed or plumbed cannot be returned, so confirm fitment before installation.\u003c\/p\u003e\u003ch3\u003eIs this covered by a warranty?\u003c\/h3\u003e\u003cp\u003eManufacturer warranty terms vary by brand and product. Warranty claims generally require proof of purchase and, on installed equipment, evidence of professional installation.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What part number is this pool heater?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This item is supplied under part number 460736. 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