{"product_id":"oem-filter-tank-o-ring","title":"Pentair OEM Filter Tank O-Ring, 18 Inch Tank","description":"\u003cp\u003eThe Pentair 071442Z is the filter tank o-ring for 18 inch tanks. Pentair gives the ring as 18 inches by 9\/16 inch, and it is listed with the PacFab Nautilus Plus DE filter parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe tank o-ring sits between the upper and lower halves of the filter body and is what the band clamp squeezes to make the tank watertight. It is the only thing holding back full system pressure at that joint, so a flat, nicked or hardened ring shows up quickly as a drip or a spray around the seam.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to change it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAny time the tank is opened for a grid or cartridge service, put a new o-ring in on reassembly. A ring that has been compressed for a season has taken the shape of the groove and will not seal the same way twice. Measure your tank first, because this one is the 18 inch size.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48634425835732,"sku":"PUR-051-1442","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_34121f30-199b-476c-943c-d1ff41efdb43.png?v=1788830434","url":"https:\/\/www.activepoolsupply.com\/products\/oem-filter-tank-o-ring","provider":"Active Pool Supply","version":"1.0","type":"link"}