{"product_id":"pentair-fns-plus-tank-bottom-fnsp60-170018","title":"Pentair FNS Plus 60 sq. ft. D.E. Filter Tank Bottom Assembly | 170018","description":"\u003cp\u003eThe Pentair 170018 is the OEM replacement tank bottom assembly (lower housing half) for the FNS Plus 60 sq. ft. D.E. Filter (FNSP60). If your filter tank is cracked, damaged, or leaking at the tank seam, this is the confirmed OEM lower shell for that specific model.\u003c\/p\u003e\n\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\n\u003cstrong\u003e⚠️ IMPORTANT: FNSP60 ONLY — CONFIRM YOUR MODEL BEFORE ORDERING\u003c\/strong\u003e\u003cbr\u003e\nThis tank bottom assembly is designed specifically for the FNS Plus \u003cstrong\u003e60 sq. ft.\u003c\/strong\u003e filter (FNSP60). It is not interchangeable with other FNS Plus sizes (36, 48, 72 sq. ft.). Check the model number on your filter's data label before placing your order.\n\u003c\/p\u003e\n\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\n\u003cstrong\u003e⚠️ IMPORTANT: TANK BOTTOM HOUSING ONLY\u003c\/strong\u003e\u003cbr\u003e\nThis listing is for the lower tank shell only. The tank top half, clamp band, tank O-ring, drain assembly, internal manifold, and filter grids are \u003cstrong\u003enot included\u003c\/strong\u003e and are sold separately.\n\u003c\/p\u003e\n\n\u003cp\u003eThe tank bottom is the lower structural half of the D.E. filter's pressure vessel. Together with the tank top, it houses the internal grid assembly and maintains the water pressure needed for filtration. A cracked, spider-fractured, or warped lower shell cannot maintain a proper seal and must be replaced to restore safe filter operation.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePentair Part Number\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e170018\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePart Category\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eTank Bodies\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eQuantity Included\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e1 (Each) — lower tank half only\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFits Into\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n  \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eEquipment Line\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eModel \/ Part Number\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eFNS Plus Filter — FNS Plus Series\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eFNS PLUS 60 (FNSP60)\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eTank bottom assembly, 60 sq. ft. filter\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eCompatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003ePro Tip\u003c\/h3\u003e\n\u003cp\u003eWhen replacing the tank bottom, inspect the mating sealing surface on your existing tank top half for cracks, warping, or surface crazing. If the top half shows any signs of age-related stress, consider replacing both halves at the same time — a new lower shell paired with a compromised upper half can result in an imperfect seal at the tank joint. While the tank is open, this is also the ideal opportunity to replace the tank O-ring and inspect the clamp band assembly for corrosion or stretch. Refer to your FNSP60 parts diagram for the correct companion part numbers for your specific revision.\u003c\/p\u003e\u003c!-- wft:processed:manual:2026-03-30 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":51774088970515,"sku":"170018","price":504.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/PEN170018_0.jpg?v=1747697780","url":"https:\/\/poolaroo.com\/products\/pentair-fns-plus-tank-bottom-fnsp60-170018","provider":"Poolaroo","version":"1.0","type":"link"}