{"product_id":"pentair-460740-propane-gas-orifice-replacement-kit-mastertemp-250-pool-and-spa-heater","title":"Pentair Propane Gas Orifice Replacement Kit for MasterTemp 250 Pool and Spa Heater, 460740","description":"\u003cp\u003ePentair 460740 is the liquid propane gas orifice replacement kit for the MasterTemp 250 pool and spa heater, the 250K model.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat the orifices do\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe orifices are the calibrated openings that meter gas into the burner. Their size determines how much fuel the heater draws and therefore how it fires. Propane and natural gas run at different pressures and energy densities, which is why each fuel needs its own orifice set. Running a heater on the wrong orifices means it either starves or over fires, and neither is safe or efficient.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWho should fit it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis is gas train work. It should be carried out by a licensed gas technician who can confirm the kit matches the appliance and the fuel supply, set the heater up correctly, and leak test it before it is returned to service. Local code decides what is permitted, and that comes ahead of anything on a parts page.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48634384580820,"sku":"PUR-151-1105","price":58.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/460740_pentair_gasorifice.jpg?v=1788828917","url":"https:\/\/www.activepoolsupply.com\/products\/pentair-460740-propane-gas-orifice-replacement-kit-mastertemp-250-pool-and-spa-heater","provider":"Active Pool Supply","version":"1.0","type":"link"}