{"product_id":"zodiac-r0589405-heat-exchanger-tube-replacement-for-model-400-jxi-heater","title":"Jandy Heat Exchanger Tube Replacement for Model 400 JXi Heater, R0589405","description":"\u003cp\u003eThe Jandy R0589405 is the heat exchanger tube replacement for the Model 400 JXi gas pool and spa heater. The same part is also cataloged under the Zodiac name.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat the heat exchanger does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe exchanger is the part that actually heats the water. Pool water is pumped through it while the burner fires beneath, and the heat crosses the tube wall into the water. Every other component in the heater is there to control that process.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen it needs replacing\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHeat exchangers fail by corroding through, usually after long running with unbalanced water or with poor flow. Once a tube leaks, water gets into the burner area and the heater cannot run safely. It is not a repair that can be patched in place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore you order\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis tube is specific to the Model 400 JXi. Check the model and size on the heater rating plate first. Replacing an exchanger means opening up the heater, so it is normally work for a qualified heater technician.\u003c\/p\u003e","brand":"Jandy","offers":[{"title":"Default Title","offer_id":48625746706644,"sku":"LAR-151-3254","price":1234.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_769e8223-e5cc-4bf1-a78f-0c8b33eaf6a2.jpg?v=1788691189","url":"https:\/\/www.activepoolsupply.com\/products\/zodiac-r0589405-heat-exchanger-tube-replacement-for-model-400-jxi-heater","provider":"Active Pool Supply","version":"1.0","type":"link"}