{"product_id":"element-assembly-complete-36-sqft","title":"Pentair FNS Plus Filter Element Assembly Complete 36 Sqft","description":"\u003cp\u003eThe Pentair 59023500 is the complete internal grid assembly for the 36 sq ft FNS Plus DE filter. Rather than a loose set of grids to fit one at a time, it arrives as the whole element: manifold, grids, grid retainer and thru rod, assembled and ready to set into the tank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to replace the element\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDE grids wear over years of backwashing and acid washing. Torn fabric lets DE pass back to the pool, blinded fabric shortens the cycle between cleanings, and a cracked manifold bypasses the grids altogether. If more than one or two grids are past saving, replacing the assembly as a unit is faster than rebuilding and gets the filter back to its rated flow in one step.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFit\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis assembly is sized for the 36 sq ft FNS Plus tank. The 48 and 60 sq ft models take taller grids and a different part number, so check the label on your tank before ordering. It is the genuine Pentair part listed on the FNS Plus parts diagram.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48624832872660,"sku":"AMP-051-4017","price":316.19,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_422abc41-a697-4f7e-b870-1b068447891b.jpg?v=1788642929","url":"https:\/\/www.activepoolsupply.com\/products\/element-assembly-complete-36-sqft","provider":"Active Pool Supply","version":"1.0","type":"link"}