{"product_id":"21-lower-tank-half","title":"Sta-Rite 21\" System 3 Lower Tank Half","description":"\u003cp\u003eThis is the lower tank half for the 21 inch Sta-Rite System 3 filter, part number 24850-0102S. It is the bottom shell of the filter body, the piece that holds the internals and carries the plumbing connections.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich filters it fits\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSta-Rite used the same 21 inch tank across several System 3 models, so this half serves the modular SMD Series D.E. filter, the SD Series D.E. filter model S7D75, and the SS-Series sand filters S7S50 and S8S70. Confirm your model tag before ordering, since System 3 filters were also built in larger tank sizes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen you need one\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA tank half is bought when the shell itself has failed: a crack, a split at the clamp band, or a leak that keeps coming back after a new o-ring and a careful clamp. Once the tank is compromised, no seal will hold it, and the shell has to be replaced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat carries over\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe internals stay with your filter. Grids, the manifold, the drain plug and the plumbing all move into the new half. The tank o-ring that seals the two halves together is a separate item, and fitting a fresh one is standard practice any time the filter is split open.\u003c\/p\u003e","brand":"Sta-Rite","offers":[{"title":"Default Title","offer_id":48625785405652,"sku":"STA-101-2250","price":1147.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_305786d8-06ee-40d1-9c05-b3292a0aae3b.jpg?v=1788692355","url":"https:\/\/www.activepoolsupply.com\/products\/21-lower-tank-half","provider":"Active Pool Supply","version":"1.0","type":"link"}