Pentair D-Series Cast Iron Self-Priming Centrifugal Commercial Pump, 5 HP, 230/460 V, Three Phase | DMJ3-172
Pentair
SKU: DMJ3-172
Pentair / Sta-Rite DMJ3-172 D-Series Commercial Pool Pump (5 HP, 3-Phase, 230/460V, Medium Head)
The Pentair / Sta-Rite DMJ3-172 is a heavy-duty, self-priming centrifugal pump from the Sta-Rite D-Series line, built for commercial pool circulation where high flow, reliable priming, and serviceability matter. This model is a 5 HP, 3-phase pump commonly used on larger pools, water features, and commercial filtration systems that require a rugged cast-iron wet end and stable medium-head performance.
Key Specifications
- Model: DMJ3-172
- Series: Sta-Rite D-Series (Medium Head)
- Horsepower: 5 HP
- Phase: 3-Phase
- Voltage: 230/460V (3-phase)
- Port Size (NPT): 2-1/2"
- Suction Connection: Uses a separate suction flange to match your plumbing size (sold separately)
Construction & Design Features
- Rugged wet end: Cast iron body designed for commercial-duty operation
- Bronze enclosed impeller: Built for durability and consistent hydraulic performance
- Fast self-priming design: Helps restore prime quickly after basket cleaning or service
- Back pull-out service design: Motor and rotating assembly can be serviced without disturbing plumbing (in typical installations)
- Drain port: Helps with winterizing and service draining
- Strainer option: Can be paired with a compatible hair & lint strainer (sold separately) for debris protection and commercial compliance requirements
Common Applications
- Commercial pool filtration circulation
- Large residential pools requiring higher flow and durable construction
- Water features and equipment pads where dependable priming and service access are priorities
- Systems using commercial sand or cartridge filtration with higher hydraulic demand
What to Verify Before Ordering
- Power supply: Confirm 3-phase power is available and matches your facility voltage (230V or 460V)
- Plumbing connections: Confirm your required suction flange size and discharge piping size before installation
- Space/clearance: Ensure room for service access (lid/strainer access if installed, and motor pull-back clearance if applicable)
Installation Notes
- Install on a solid, level equipment pad and follow proper bonding/grounding practices per local code.
- Use correct suction piping sizing and minimize suction restrictions to reduce cavitation and noise.
- If adding a hair & lint strainer, ensure it is sized correctly and oriented for easy basket access.
- After startup, verify prime, check for leaks, and confirm stable operating pressure/flow.
Installation and Maintenance Tips
- Keep suction-side valves fully open and baskets clean to reduce cavitation and protect the impeller and seal.
- Address small drips early—mechanical seal leaks can lead to motor damage if ignored.
- Recheck fasteners and flange/union connections after initial run-in as gaskets seat.
- During seasonal shutdown, drain the pump and protect it from freeze conditions.
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Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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