{"product_id":"pentair-sta-rite-system-3-modular-media-filters-sm-series-cartridge-s7m400","title":"Sta-Rite System 3 Modular Media Filters - SM Series, Cartridge, 400 sq. ft, 115 GPM, 55,000 gallons, In ground Pool | S7M400","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSta-Rite System 3 Modular Media Filter | S7M400\u003c\/strong\u003e is a high-capacity cartridge-style pool filter designed for strong water clarity, long filter cycles, and simplified maintenance. With \u003cstrong\u003e400 square feet of filtration area\u003c\/strong\u003e and a maximum flow rate of \u003cstrong\u003e115 GPM\u003c\/strong\u003e, this filter is built for residential inground pools, spas, and water feature systems that need dependable filtration performance.\u003c\/p\u003e\n\u003cp\u003eUnlike traditional sand or DE filters, the System 3 Modular Media design does \u003cstrong\u003enot require backwashing\u003c\/strong\u003e. Instead, the internal modular cartridges are removed, rinsed, and reinstalled when cleaning is needed. This helps conserve water, simplify maintenance, and reduce the need for backwash plumbing.\u003c\/p\u003e\n\u003cp\u003eBuilt with Sta-Rite’s durable \u003cstrong\u003eDura-Glas® glass-reinforced composite resin tank\u003c\/strong\u003e, balanced-flow hydraulics, and secure \u003cstrong\u003ePosi-Lok™ clamp system\u003c\/strong\u003e, the S7M400 is a professional-grade filtration option for pool owners who want efficient, low-maintenance cartridge filtration.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eIdeal For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eResidential inground swimming pools\u003c\/li\u003e\n\u003cli\u003eInground spas and hot tubs\u003c\/li\u003e\n\u003cli\u003ePool and spa combination systems\u003c\/li\u003e\n\u003cli\u003eWater feature circulation systems\u003c\/li\u003e\n\u003cli\u003ePools up to approximately 55,000 gallons\u003c\/li\u003e\n\u003cli\u003eCustomers wanting no-backwash filtration\u003c\/li\u003e\n\u003cli\u003eEquipment pad upgrades\u003c\/li\u003e\n\u003cli\u003eReplacing older cartridge filters\u003c\/li\u003e\n\u003cli\u003eHigh-capacity filtration applications\u003c\/li\u003e\n\u003cli\u003eProfessional pool equipment installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e400 sq. ft. filtration area\u003c\/strong\u003e — large media surface area helps capture dirt, debris, and fine particles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e115 GPM maximum flow rate\u003c\/strong\u003e — supports strong circulation for compatible pool systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModular media cartridge design\u003c\/strong\u003e — uses inner and outer cartridge elements for high-capacity filtration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo backwashing required\u003c\/strong\u003e — cartridges are cleaned by rinsing, helping reduce water waste.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDura-Glas® reinforced tank construction\u003c\/strong\u003e — durable glass-reinforced composite resin built for outdoor pool environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced-flow hydraulic design\u003c\/strong\u003e — helps distribute water evenly through the filter media for improved filtration performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegral manifold design\u003c\/strong\u003e — supports efficient water flow and cartridge performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosi-Lok™ clamp system\u003c\/strong\u003e — provides secure tank closure and service access.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" tank ports\u003c\/strong\u003e — supports standard high-flow pool plumbing connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong cleaning cycles\u003c\/strong\u003e — large dirt-holding capacity helps extend time between filter cleanings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional-grade SM Series design\u003c\/strong\u003e — part of Sta-Rite’s System 3 Modular Media filter line.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBenefits\u003c\/h2\u003e\n\u003cp\u003eThe Sta-Rite S7M400 System 3 filter is designed to deliver excellent water clarity with less routine maintenance than many smaller cartridge filters. Its large modular media design provides a high dirt-holding capacity, which helps extend filter cycles and reduce how often cartridges need to be cleaned.\u003c\/p\u003e\n\u003cp\u003eBecause the filter does not require backwashing, it can help conserve water and simplify equipment pad design. The durable Dura-Glas tank and secure Posi-Lok clamp system make it a strong choice for long-term residential pool filtration.\u003c\/p\u003e\n\u003cp\u003eFor pool owners looking for a high-capacity, no-backwash filter with strong hydraulic performance, the S7M400 is a reliable upgrade option.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eSta-Rite System 3 Modular Media Filter, SM Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSta-Rite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003ePentair \/ Sta-Rite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eS7M400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eS7M400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e022315302242\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eModular media cartridge filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Series\u003c\/td\u003e\n\u003ctd\u003eSystem 3 \/ SM Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eCartridge \/ modular media\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiltration Area\u003c\/td\u003e\n\u003ctd\u003e400 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Flow Rate\u003c\/td\u003e\n\u003ctd\u003e115 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Performance Flow Range\u003c\/td\u003e\n\u003ctd\u003eApprox. 50–90 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Flow Range\u003c\/td\u003e\n\u003ctd\u003eApprox. 50–115 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePool Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to approx. 55,000 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6-Hour Turnover Capacity\u003c\/td\u003e\n\u003ctd\u003eApprox. 41,000 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8-Hour Turnover Capacity\u003c\/td\u003e\n\u003ctd\u003eApprox. 55,000 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10-Hour Turnover Capacity\u003c\/td\u003e\n\u003ctd\u003eApprox. 69,000 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlumbing Port Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eInground pools, inground spas, hot tubs, and water features\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTank Material\u003c\/td\u003e\n\u003ctd\u003eDura-Glas glass-reinforced composite resin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamp Type\u003c\/td\u003e\n\u003ctd\u003ePosi-Lok clamp system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydraulic Design\u003c\/td\u003e\n\u003ctd\u003eBalanced-flow design with integral manifold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackwashing Required\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCartridge Configuration\u003c\/td\u003e\n\u003ctd\u003eModular inner and outer cartridge elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Cartridge Area\u003c\/td\u003e\n\u003ctd\u003eApprox. 264 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Cartridge Area\u003c\/td\u003e\n\u003ctd\u003eApprox. 136 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement Outer Cartridge Reference\u003c\/td\u003e\n\u003ctd\u003eS7M400 large outer cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement Inner Cartridge Reference\u003c\/td\u003e\n\u003ctd\u003eS7M400 small inner cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApprox. Dimensions\u003c\/td\u003e\n\u003ctd\u003e27\" L x 27\" W x 40.5\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarton \/ Shipping Weight\u003c\/td\u003e\n\u003ctd\u003eApprox. 125 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEquipment Category\u003c\/td\u003e\n\u003ctd\u003ePool filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfessional Installation Recommended\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSold As\u003c\/td\u003e\n\u003ctd\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003ch2\u003eIncluded Components\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × Sta-Rite System 3 S7M400 modular media filter tank assembly\u003c\/li\u003e\n\u003cli\u003eInner modular cartridge element\u003c\/li\u003e\n\u003cli\u003eOuter modular cartridge element\u003c\/li\u003e\n\u003cli\u003ePosi-Lok clamp assembly\u003c\/li\u003e\n\u003cli\u003eInternal manifold components\u003c\/li\u003e\n\u003cli\u003eManufacturer-supplied installation documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlumbing unions, valves, additional fittings, replacement cartridges, O-rings, pressure gauge, air relief components, and installation materials may vary by supplier packaging. Confirm included components before installation.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThe Sta-Rite S7M400 should be installed by a qualified pool professional. Proper installation requires correct plumbing alignment, flow rate verification, equipment pad spacing, pressure testing, and startup inspection.\u003c\/p\u003e\n\u003cp\u003eBefore installation, confirm that the pool pump flow does not exceed the filter’s \u003cstrong\u003e115 GPM\u003c\/strong\u003e maximum flow rating and that the system is designed for compatible \u003cstrong\u003e2\" plumbing\u003c\/strong\u003e. The filter should be installed on a level, stable equipment pad with enough clearance around the tank for cartridge removal and routine service.\u003c\/p\u003e\n\u003cp\u003eAlways turn off the pump and relieve system pressure before opening the filter tank. Never loosen or remove clamps while the filter is pressurized.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCustomer-Facing Q\u0026amp;A\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the Sta-Rite S7M400?\u003c\/strong\u003e\u003cbr\u003eA: It is a Sta-Rite System 3 SM Series modular media cartridge filter with 400 sq. ft. of filtration area and a maximum flow rate of 115 GPM.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the SKU?\u003c\/strong\u003e\u003cbr\u003eA: The SKU is \u003cstrong\u003eS7M400\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the UPC?\u003c\/strong\u003e\u003cbr\u003eA: The UPC is \u003cstrong\u003e022315302242\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a cartridge, sand, or DE filter?\u003c\/strong\u003e\u003cbr\u003eA: This is a \u003cstrong\u003emodular media cartridge filter\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this filter require backwashing?\u003c\/strong\u003e\u003cbr\u003eA: No. The cartridges are removed and rinsed for cleaning, so routine backwashing is not required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the filtration area?\u003c\/strong\u003e\u003cbr\u003eA: This filter has \u003cstrong\u003e400 sq. ft.\u003c\/strong\u003e of total filtration area.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum flow rate?\u003c\/strong\u003e\u003cbr\u003eA: The maximum flow rate is \u003cstrong\u003e115 GPM\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What size pool can this filter support?\u003c\/strong\u003e\u003cbr\u003eA: It is commonly listed for pools up to approximately \u003cstrong\u003e55,000 gallons\u003c\/strong\u003e, depending on turnover requirements, pump sizing, plumbing design, and local code.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What size plumbing ports does it have?\u003c\/strong\u003e\u003cbr\u003eA: The S7M400 uses \u003cstrong\u003e2\" tank ports\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What cartridges does this filter use?\u003c\/strong\u003e\u003cbr\u003eA: It uses a two-piece modular cartridge set: a large outer cartridge and a smaller inner cartridge for the S7M400 system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the tank made from?\u003c\/strong\u003e\u003cbr\u003eA: The tank is made from Sta-Rite’s Dura-Glas glass-reinforced composite resin.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this for above-ground or inground pools?\u003c\/strong\u003e\u003cbr\u003eA: This model is designed for \u003cstrong\u003einground pool\u003c\/strong\u003e applications, as well as compatible inground spas, hot tubs, and water feature systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Should this be professionally installed?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Professional installation is recommended to ensure proper plumbing, pressure testing, flow rate, and safe operation.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":53600929906998,"sku":"S7M400","price":1749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/1167\/9798\/files\/pentair-sta-rite-system-3-modular-media-filters-sm-series-cartridge-s7m400.jpg?v=1792648119","url":"https:\/\/poolsupplydepot.net\/products\/pentair-sta-rite-system-3-modular-media-filters-sm-series-cartridge-s7m400","provider":"Pool Supply Depot","version":"1.0","type":"link"}