{"title":"Pentair D Series Commercial Pump Replacement Parts","description":"\u003cp\u003ePentair D Series Commercial Pump parts, matched to the diagram. Click any number on the exploded view to see the part, price and stock. Leaking pump? It is usually the shaft seal or an o-ring. Losing prime? Start with the lid o-ring. Not sure what you have? Call us or bring the part into any of our Phoenix, Scottsdale, Chandler or Las Vegas stores and we'll match it.\u003c\/p\u003e","products":[{"product_id":"pentairdseriescastironselfprimingcentrifugalcommercialpump5hp230460vthreephasedmj3172pendmj3172","title":"Pentair D-Series Cast Iron Self-Priming Centrifugal Commercial Pump, 5 HP, 230\/460 V, Three Phase | DMJ3-172","description":"\u003cdiv\u003e\n  \u003ch2\u003ePentair \/ Sta-Rite DMJ3-172 D-Series Commercial Pool Pump (5 HP, 3-Phase, 230\/460V, Medium Head)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Pentair \/ Sta-Rite DMJ3-172 is a heavy-duty, self-priming centrifugal pump from the Sta-Rite D-Series line, built for\n    commercial pool circulation where high flow, reliable priming, and serviceability matter. This model is a\n    \u003cstrong\u003e5 HP, 3-phase\u003c\/strong\u003e pump commonly used on larger pools, water features, and commercial filtration systems that require\n    a rugged cast-iron wet end and stable medium-head performance.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Specifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e DMJ3-172\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Sta-Rite D-Series (Medium Head)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHorsepower:\u003c\/strong\u003e 5 HP\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e 3-Phase\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 230\/460V (3-phase)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePort Size (NPT):\u003c\/strong\u003e 2-1\/2\"\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSuction Connection:\u003c\/strong\u003e Uses a separate suction flange to match your plumbing size (sold separately)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eConstruction \u0026amp; Design Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRugged wet end:\u003c\/strong\u003e Cast iron body designed for commercial-duty operation\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBronze enclosed impeller:\u003c\/strong\u003e Built for durability and consistent hydraulic performance\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast self-priming design:\u003c\/strong\u003e Helps restore prime quickly after basket cleaning or service\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBack pull-out service design:\u003c\/strong\u003e Motor and rotating assembly can be serviced without disturbing plumbing (in typical installations)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDrain port:\u003c\/strong\u003e Helps with winterizing and service draining\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStrainer option:\u003c\/strong\u003e Can be paired with a compatible hair \u0026amp; lint strainer (sold separately) for debris protection and commercial compliance requirements\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCommon Applications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCommercial pool filtration circulation\u003c\/li\u003e\n    \u003cli\u003eLarge residential pools requiring higher flow and durable construction\u003c\/li\u003e\n    \u003cli\u003eWater features and equipment pads where dependable priming and service access are priorities\u003c\/li\u003e\n    \u003cli\u003eSystems using commercial sand or cartridge filtration with higher hydraulic demand\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat to Verify Before Ordering\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePower supply:\u003c\/strong\u003e Confirm 3-phase power is available and matches your facility voltage (230V or 460V)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePlumbing connections:\u003c\/strong\u003e Confirm your required suction flange size and discharge piping size before installation\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSpace\/clearance:\u003c\/strong\u003e Ensure room for service access (lid\/strainer access if installed, and motor pull-back clearance if applicable)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eInstall on a solid, level equipment pad and follow proper bonding\/grounding practices per local code.\u003c\/li\u003e\n    \u003cli\u003eUse correct suction piping sizing and minimize suction restrictions to reduce cavitation and noise.\u003c\/li\u003e\n    \u003cli\u003eIf adding a hair \u0026amp; lint strainer, ensure it is sized correctly and oriented for easy basket access.\u003c\/li\u003e\n    \u003cli\u003eAfter startup, verify prime, check for leaks, and confirm stable operating pressure\/flow.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation and Maintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eKeep suction-side valves fully open and baskets clean to reduce cavitation and protect the impeller and seal.\u003c\/li\u003e\n    \u003cli\u003eAddress small drips early—mechanical seal leaks can lead to motor damage if ignored.\u003c\/li\u003e\n    \u003cli\u003eRecheck fasteners and flange\/union connections after initial run-in as gaskets seat.\u003c\/li\u003e\n    \u003cli\u003eDuring seasonal shutdown, drain the pump and protect it from freeze conditions.\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=Sta-Rite%20D%20Series%20hair%20and%20lint%20strainer\"\u003eSta-Rite D-Series hair \u0026amp; lint strainers\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=Sta-Rite%20D%20Series%20suction%20flange\"\u003eSta-Rite D-Series suction flanges\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=Sta-Rite%20D%20Series%20mechanical%20seal\"\u003eSta-Rite D-Series mechanical shaft seals\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=Sta-Rite%20D%20Series%20gasket%20o-ring\"\u003eSta-Rite D-Series gaskets and O-rings\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=commercial%20pool%20pump%20check%20valve\"\u003eCommercial pump check valves\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52589965738300,"sku":"DMJ3-172","price":2199.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/pentair-d-series-cast-iron-self-priming-centrifugal-commercial-pump-5-hp-230460-v-three-phase-dmj3-172-pool-pumps-1370128.jpg?v=1770213924"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/collections\/pentair-d-series-commercial-exploded-view.png?v=1790356476","url":"https:\/\/aquapoolsupply.com\/collections\/parts-list-pentair-d-series-commercial.oembed","provider":"Aqua Pool Supply","version":"1.0","type":"link"}