Pentair 355187Z Challenger impeller, 3/4 HP full rated and 1 HP up rated high pressurePentair Challenger Impeller, 3/4 HP Full Rated / 1 HP Up Rated, High Pressure, 355187Z In stock$5599
Pentair 355187Z Challenger impeller, 3/4 HP full rated and 1 HP up rated high pressure

Pentair Challenger Impeller, 3/4 HP Full Rated / 1 HP Up Rated, High Pressure, 355187Z

Ask a questionMPN 355187Z
$5599
In stock

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Quick overview

  • Genuine Pentair Factory impeller 355187Z, also listed as 355187.
  • High pressure models The impeller for the high pressure version of the Challenger, not the standard one.
  • Horsepower matched 3/4 HP full rated and 1 HP up rated, the pairing this impeller is cut for.
  • Sets the pump curve The impeller is what decides how much flow and head the pump makes.
  • Common wear part Impellers clog with debris and wear at the vanes, and both show up as weak returns.
  • Rebuild together Pentair lists the matching diffuser, the impeller locking screw and a pump rebuild kit as separate parts.
Full description and specifications ↓

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Subtotal

Product details

The Pentair 355187Z is the impeller for the Challenger high pressure pump at 3/4 HP full rated and 1 HP up rated. It also appears under the number 355187, and it is the genuine Pentair part.

What the impeller decides

The impeller is the piece that actually moves the water. Its size and vane shape are what set the flow and the head the pump can produce, which is why impellers are matched to a specific horsepower rating rather than to the pump body. Fitting one that is not cut for your motor gives you a pump that either underperforms or works the motor harder than it should.

When to change it

Two things go wrong. Debris packs into the vanes and strangles flow, which is fixable by cleaning it out. Or the vanes wear down and break, which is not. If the basket is full of water, the filter is clean and the returns are still weak, pull the impeller and look at it.

Do it once

Pentair lists the matching high pressure diffuser, the impeller locking screw, the mechanical seal and a full pump rebuild kit as separate items. Since the pump is already open, it is worth changing the seal and the diffuser at the same time.

Specifications
Brand Pentair
Manufacturer part number 355187Z
Also listed as 355187
UPC 788379658588
Type Impeller
Part type Pool pump part
Horsepower 3/4 HP full rated, 1 HP up rated
Model group High pressure models
Fits Pentair Challenger 3/4 HP full rated to 1 HP up rated high pressure pump
Shipping weight 0.35 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Which pump does this fit?
The Pentair Challenger high pressure pump at 3/4 HP full rated to 1 HP up rated. The horsepower rating on the motor label is what to match, not the pump body alone.
Is 355187 the same part?
Yes. This impeller appears as both 355187 and 355187Z.
Does the diffuser come with it?
No. The matching diffuser is a separate Pentair part, as is the impeller locking screw.
How do I know the impeller is the problem?
Weak returns with a clean filter and a full basket of water usually means the impeller. Check for debris packed into the vanes first, and if the vanes are worn or broken, replace it.
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