Complete Wet End Replacement for Pentair 357149 — WhisperFlo & IntelliFlo, 3 HP
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This Complete Wet End Replacement Kit is an aftermarket assembly compatible with Pentair WhisperFlo and IntelliFlo 3 HP pool pumps (replaces the wet end associated with Pentair 357149). It rebuilds the pump's entire water-handling section in one kit — housing, seal plate, diffuser, basket, lid, and all hardware — so you can fix a cracked, leaking, or worn wet end without replacing the motor or sourcing parts individually.
Key Features
- Compatible replacement for Pentair 357149: Engineered to match the fit and function of the OEM wet end at a lower cost.
- Complete rebuild in one kit: Everything for the wet end in a single box — no piecing together part numbers.
- Built for 3 HP / high-flow: Sized for WhisperFlo 3 HP and IntelliFlo 3 HP-class pumps and continuous-use applications.
- Reinforced housing & seal plate: Extra material versus standard parts helps resist cracking under high pressure.
- Keeps your motor: Reuse your existing working motor — far cheaper than a whole new pump.
- Includes hi-temp unions: 2" hi-temp unions speed up installation and future service.
What's Included
- Pump housing / volute (equivalent to 350015)
- Seal plate (074564) with PS-1000 shaft seal
- Diffuser with O-ring (072928 / 072927)
- Strainer basket (070387Z)
- Lid with O-ring (357151) and locking clamp ring (357199)
- Foot insert & base (070929 / 070927)
- Pot/drain screws and plugs (071131), diffuser screws, and complete hardware kit
- 2" hi-temp unions
Not Included
- Motor — reuse your existing motor
- Impeller — impellers are specific to your pump's horsepower and are sold separately
Specifications
- Type: Complete wet end replacement kit (aftermarket)
- Compatible With: Pentair WhisperFlo 3 HP and IntelliFlo 3 HP-class pumps (incl. models 011018, 011055, 011056)
- Part Reference: 357149
- Material: Reinforced thermoplastic housing; corrosion-resistant hardware
- Note: Aftermarket replacement — not a Pentair OEM component; brand names are for compatibility reference only
Frequently Asked Questions
Which pumps does this fit?
Pentair WhisperFlo and IntelliFlo pumps in the 3 HP class. For 0.5–2 HP pumps, order the 0.5–2 HP version instead. Always verify your pump model and horsepower before ordering.
Does it include the impeller?
No. The impeller is HP-specific and sold separately — matching the impeller to your pump's horsepower is essential. The motor is also not included; you reuse your existing one.
Is this a genuine Pentair part?
No — it's a quality aftermarket replacement designed to be compatible with the Pentair 357149 wet end, matching the fit and function of the OEM assembly at a lower price.
What exactly comes in the kit?
The full wet end: housing/volute, seal plate with shaft seal, diffuser with O-ring, strainer basket, lid with O-ring, locking ring, foot insert/base, screws, drain plugs, complete hardware, and 2" hi-temp unions. See "What's Included" above.
How is this different from the 0.5–2 HP version?
Horsepower and internal sizing. This kit is built for 3 HP pumps; the other version fits 0.5–2 HP pumps. They are not interchangeable — match the kit to your pump's HP.
Should I replace the shaft seal too?
It's already included (PS-1000) — always install the fresh seal that ships with the kit to prevent repeat leaks. Professional installation is recommended.
Frequently asked questions
Is a variable speed pump worth it?
Variable speed pumps draw dramatically less power at low speed because energy use falls far faster than flow does. Many jurisdictions now require variable speed for new and replacement residential pool pumps above a certain horsepower, so check local code before buying single-speed.
What is the part number for this pump?
Pentair lists this pump under part number 357149-3HP. Quote 357149-3HP when you cross-reference against your equipment manual, an existing part, or a parts diagram, so you are comparing the same revision.
How do I match a pump to my pool?
Work from the plumbing rather than the pool size: line diameter, total dynamic head and the flow your filter and heater can accept all cap the useful pump size. An oversized pump on undersized plumbing wastes power and can exceed the filter's rated flow.
How do I confirm this fits my equipment?
Match the part number stamped on the component you are replacing, or look it up in the parts list for your Pentair equipment. If your model or serial number is not named on this page, send it to us before you order and we will confirm the fit.
What do I need to check before installing this pump?
Confirm the voltage, the union or port sizes and the mounting footprint against your existing installation. Pump replacement usually involves electrical connections and may require a licensed electrician depending on local requirements.
Is there a warranty on this pump?
It carries the standard Pentair manufacturer warranty. The terms are set by Pentair, and on some equipment the coverage only applies when a licensed professional performs the installation. Keep the receipt and packaging until you have confirmed correct operation.