{"product_id":"pentairdefilterlowertankhalf248500102spen248500102s","title":"Pentair DE Filter Lower Tank Half | 24850-0102S","description":"\u003cdiv\u003e\n  \u003ch2\u003ePentair \/ Sta-Rite 24850-0102S System:3 Lower Tank Half (21\" Filter Tank Bottom)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Pentair \/ Sta-Rite \u003cstrong\u003e24850-0102S\u003c\/strong\u003e is an OEM replacement \u003cstrong\u003elower tank half\u003c\/strong\u003e (tank bottom) for select\n    Sta-Rite System:3 filter systems that use a \u003cstrong\u003e21-inch tank\u003c\/strong\u003e. This part restores the structural base of the filter and the\n    sealing surface where the tank O-ring seats. It’s typically replaced when the original lower shell is cracked, warped, leaking, or the\n    clamp interface is damaged.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCommon Compatibility (Verify Your Filter Model)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eSta-Rite System:3 Modular Media (SM series) – commonly listed for \u003cstrong\u003eS7M120\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eSta-Rite System:3 Modular D.E. (SMD \/ SD series) – commonly listed for \u003cstrong\u003eS7MD60\u003c\/strong\u003e, \u003cstrong\u003eS7MD72\u003c\/strong\u003e, \u003cstrong\u003eS7D75\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eSta-Rite System:3 Sand (SS series) – commonly listed for \u003cstrong\u003eS7S50\u003c\/strong\u003e (and often referenced on System:3 sand configurations)\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\n    System:3 parts vary by tank size (21\" vs 25\") and series. Confirm your tank size and exact model on the filter label and parts diagram.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat This Part Does\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eReplaces the lower portion of the filter tank to restore leak-free operation\u003c\/li\u003e\n    \u003cli\u003eProvides the seating surface for the tank O-ring and proper tank alignment\u003c\/li\u003e\n    \u003cli\u003eSupports internal filter modules and plumbing bulkheads (model dependent)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhen to Replace the Lower Tank Half\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHairline cracks, stress fractures, or visible seepage from the tank bottom\u003c\/li\u003e\n    \u003cli\u003eWarping\/deformation that prevents the tank O-ring from sealing\u003c\/li\u003e\n    \u003cli\u003eDamage at the clamp\/locking interface that prevents safe, even clamping\u003c\/li\u003e\n    \u003cli\u003eRecurring leaks after replacing the tank O-ring and cleaning sealing surfaces\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eTurn off the pump and \u003cstrong\u003erelieve all pressure\u003c\/strong\u003e at the air relief before opening the filter.\u003c\/li\u003e\n    \u003cli\u003eInspect the \u003cstrong\u003etank O-ring\u003c\/strong\u003e and replace it if flattened, swollen, cracked, or nicked.\u003c\/li\u003e\n    \u003cli\u003eClean all sealing surfaces thoroughly; debris or scale can cause leaks even with new parts.\u003c\/li\u003e\n    \u003cli\u003eTighten the clamp evenly per manufacturer procedure (do not over-tighten).\u003c\/li\u003e\n    \u003cli\u003eAfter restart, check for slow seepage once the system reaches full operating pressure.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products (Aqua Pool Supply)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=24850-0102S\"\u003e24850-0102S Lower Tank Half (Search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=System%203%20tank%20o-ring\"\u003eSystem:3 Tank O-Ring \/ Seal (Search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=System%203%20clamp%20assembly\"\u003eSystem:3 Clamp \/ Band Hardware (Search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=System%203%20air%20relief\"\u003eSystem:3 Air Relief \/ Gauge Parts (Search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pool%20silicone%20lubricant\"\u003ePool-Safe Silicone O-Ring Lubricant (Search)\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eAlways fully relieve pressure before opening the filter to protect components and sealing surfaces.\u003c\/li\u003e\n    \u003cli\u003eKeep the tank O-ring clean and lightly lubricated with pool-safe silicone lubricant to reduce pinching and leaks.\u003c\/li\u003e\n    \u003cli\u003eIf the tank sits in direct sun, provide shade when possible to help extend plastic component life.\u003c\/li\u003e\n    \u003cli\u003eRecord your clean starting pressure after reassembly; a rising baseline can indicate restriction or system changes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52589949223228,"sku":"24850-0102S","price":809.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/pentair-de-filter-lower-tank-half-24850-0102s-pool-filter-parts-9660731.jpg?v=1771677734","url":"https:\/\/aquapoolsupply.com\/products\/pentairdefilterlowertankhalf248500102spen248500102s","provider":"Aqua Pool Supply","version":"1.0","type":"link"}