{"product_id":"1-threaded-union","title":"Pentair Rainbow 1\" Threaded Union, HC Series","description":"\u003cp\u003eThe Pentair R270531 is the 1\" threaded union used on Rainbow HC series automatic chemical feeders, including the HC-3315, HC-3330 and 3340. It is the genuine Pentair part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat the union is for\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA feeder has to come out of the line from time to time, for service, for a rebuild, or to be replaced outright. A union is the fitting that makes that possible without a saw: undo the nut, lift the feeder out, and put it back on the same threads afterwards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to replace one\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eUnions are opened and closed more than any other fitting on a feeder, and each cycle wears the nut threads and the seal face. If the joint weeps after tightening, or the nut no longer pulls up cleanly, replacing the union is faster and more reliable than trying to seal a worn one. Check that your feeder is an HC series model before ordering, since feeder threads are not shared across families.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48633767035092,"sku":"RAI-051-4015","price":28.28,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_22a91a6e-258d-44d1-8151-5f16c0ac38a0.jpg?v=1788814866","url":"https:\/\/www.activepoolsupply.com\/products\/1-threaded-union","provider":"Active Pool Supply","version":"1.0","type":"link"}