{"product_id":"1-1-2-npt-plug","title":"Pentair 1-1\/2\" NPT Plug","description":"\u003cp\u003eThis is the genuine Pentair 36305-4008 plug, a 1-1\/2 inch NPT threaded plug. It appears on the Sta-Rite System 3 D.E. filter parts diagram for the S7D75 and S8D110 models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it is for\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA plug like this closes a threaded port that is not being used, or seals a drain point once a filter is put back into service. It is a small part with an outsized consequence: a port left open or badly sealed will empty a filter tank, and a plug that has cracked with age will do the same thing quietly, over hours, while the pump loses prime.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitting it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNPT is a tapered thread, so it seals by wedging as it goes in rather than by being cranked down hard against a face. Thread it in until it is snug and stop there. Plastic ports split when someone reaches for a longer wrench to chase a drip, and at that point the repair becomes a great deal more expensive than the plug. If the original plug used an O-ring, inspect it and replace it if it is flat or hardened.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eA note on the brand\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSta-Rite is part of Pentair, which is why a plug shown on a Sta-Rite filter diagram carries a Pentair part number.\u003c\/p\u003e","brand":"Sta-Rite","offers":[{"title":"Default Title","offer_id":48634283327700,"sku":"SWQ-051-3967","price":28.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_36ceca94-e23c-474b-9d7f-1f7f323cb3f9.jpg?v=1788828103","url":"https:\/\/www.activepoolsupply.com\/products\/1-1-2-npt-plug","provider":"Active Pool Supply","version":"1.0","type":"link"}