{"product_id":"triton-ii-buttress-thread-closure-o-ring","title":"Pentair Triton II Buttress Thread Closure O-Ring","description":"\u003cp\u003eThe Pentair 152516Z is the buttress thread closure o-ring for Triton II side mount sand filters. It is the genuine Pentair part and is also listed as 152516.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere it sits\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe closure threads into the top of the Triton II tank, and this ring is what seals it. A buttress thread carries load in one direction, which suits a pressure vessel, but the thread does not make the seal on its own. That job belongs to the o-ring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to replace it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eRubber hardens, flattens and takes a set. Once it does, the closure starts to weep under pressure no matter how firmly it is tightened. Clean the groove and the sealing face, fit a fresh ring with a light coat of silicone o-ring lubricant, and the leak goes away.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48625719410900,"sku":"PAC-051-0089","price":11.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_01c2c3a9-486b-480a-9b1b-32c77792a790.jpg?v=1788689889","url":"https:\/\/www.activepoolsupply.com\/products\/triton-ii-buttress-thread-closure-o-ring","provider":"Active Pool Supply","version":"1.0","type":"link"}