{"product_id":"pentair-461113-eti-400-high-efficiency-pool-heater-400k-btu-natural-gas-with-titanium-heat-exchanger","title":"Pentair 461113 ETi 400 High-Efficiency Pool Heater – 400K BTU Natural Gas with Titanium Heat Exchanger","description":"\u003cp data-start=\"575\" data-end=\"1023\"\u003eThe \u003cstrong data-start=\"579\" data-end=\"635\"\u003ePentair ETi 400 High-Efficiency Pool Heater (461113)\u003c\/strong\u003e delivers \u003cstrong data-start=\"645\" data-end=\"680\"\u003e400,000 BTU of powerful heating\u003c\/strong\u003e using advanced combustion technology and a \u003cstrong data-start=\"724\" data-end=\"751\"\u003etitanium heat exchanger\u003c\/strong\u003e for exceptional corrosion resistance and long life. Designed to operate with \u003cstrong data-start=\"829\" data-end=\"844\"\u003enatural gas\u003c\/strong\u003e, this high-performance heater brings fast warm-up times, consistent temperature control, and improved energy efficiency to residential or light commercial pool and spa systems.\u003c\/p\u003e \u003cp data-start=\"1025\" data-end=\"1362\"\u003eBuilt for durability, the ETi 400 uses premium components and smart digital controls to ensure reliable heat distribution and simplified operation. Whether you’re extending the swim season, maintaining comfort in cool weather, or quickly warming spa water, this heater is engineered for superior performance and long-term satisfaction.\u003c\/p\u003e \u003ch2 data-start=\"1369\" data-end=\"1391\"\u003e\u003cstrong data-start=\"1372\" data-end=\"1389\"\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong data-start=\"579\" data-end=\"635\"\u003ePentair ETi 400 High-Efficiency Pool Heater (461113) \u003c\/strong\u003eCompatibility:\u003c\/strong\u003e\u003c\/h2\u003e \u003cul data-start=\"1392\" data-end=\"1785\"\u003e \u003cli data-start=\"1392\" data-end=\"1446\"\u003e \u003cp data-start=\"1394\" data-end=\"1446\"\u003eDesigned for \u003cstrong data-start=\"1407\" data-end=\"1443\"\u003enatural gas pool and spa systems\u003c\/strong\u003e.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1447\" data-end=\"1499\"\u003e \u003cp data-start=\"1449\" data-end=\"1499\"\u003eWorks with \u003cstrong data-start=\"1460\" data-end=\"1496\"\u003estandard 2” plumbing connections\u003c\/strong\u003e.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1500\" data-end=\"1607\"\u003e \u003cp data-start=\"1502\" data-end=\"1607\"\u003eIntegrates with \u003cstrong data-start=\"1518\" data-end=\"1550\"\u003ePentair automation platforms\u003c\/strong\u003e such as IntelliCenter®, EasyTouch®, and IntelliTouch®.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1608\" data-end=\"1686\"\u003e \u003cp data-start=\"1610\" data-end=\"1686\"\u003eSuitable for \u003cstrong data-start=\"1623\" data-end=\"1683\"\u003eresidential and light commercial pool \u0026amp; spa applications\u003c\/strong\u003e.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1687\" data-end=\"1785\"\u003e \u003cp data-start=\"1689\" data-end=\"1785\"\u003eCompatible with \u003cstrong data-start=\"1705\" data-end=\"1758\"\u003evariable-speed pumps, sanitizers, and controllers\u003c\/strong\u003e for full system control.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSupplied under part number 461113 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 461113\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 788379877248\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping weight:\u003c\/strong\u003e 379 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 461113. 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 461113. 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