Pentair 355094 diffuser for Challenger High Flow pumpsPentair Challenger Diffuser, 2 HP Full Rated, 2-1/2 HP Up Rated, High Flow, 355094 In stock$5199
Pentair 355094 diffuser for Challenger High Flow pumps
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Pentair Challenger Diffuser, 2 HP Full Rated, 2-1/2 HP Up Rated, High Flow, 355094

Ask a questionMPN 355094
$5199
In stock
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Quick overview

  • Genuine Pentair part Factory diffuser 355094, matched to the impeller it works with.
  • Horsepower specific Fits the 2 HP full rated and 2-1/2 HP up rated builds, not the whole Challenger range.
  • High Flow models Listed for the Pentair Challenger High Flow pump.
  • Directs flow off the impeller The diffuser turns impeller velocity into pressure, which is where a pump gets its head.
  • A worn diffuser costs performance Cracks or a worn throat let water recirculate instead of moving through the system.
  • Change it with the impeller If the impeller is being replaced for wear, the diffuser has usually seen the same hours.
Full description and specifications ↓

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Product details

The Pentair 355094 is the diffuser for Challenger High Flow pumps in the 2 HP full rated and 2-1/2 HP up rated builds. It is the genuine Pentair part.

What the diffuser does

The diffuser sits directly over the impeller. Water leaving the impeller vanes is moving fast but carries little pressure, and the diffuser is the shaped passage that converts that speed into the head the pump is rated for. It is not a cosmetic housing piece, it is half of how a centrifugal pump works.

Match the rating, not the family name

Diffusers are cut to suit a specific impeller, so the Challenger name alone is not enough. This one covers the 2 HP full rated and 2-1/2 HP up rated High Flow builds. Read the rating off the motor label before you order.

Signs of a worn diffuser

A cracked diffuser or one with a worn throat lets water slip back around the impeller instead of moving on through the system. The pump keeps running and sounds normal, but flow and pressure fall away. If you are already in the wet end replacing an impeller, do the diffuser at the same time.

Specifications
Brand Pentair
Manufacturer part number 355094
UPC 788379699864
Part type Pool pump part
Type Diffuser
Horsepower 2 HP full rated, 2-1/2 HP up rated
Fits Pentair Challenger High Flow pumps
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 horsepower does this diffuser cover?
The 2 HP full rated and the 2-1/2 HP up rated builds.
Will it fit any Challenger pump?
It is listed for the Challenger High Flow models at those horsepower ratings. Diffusers are matched to the impeller, so check the rating on the motor label before ordering.
What does a diffuser actually do?
It sits over the impeller and converts the speed of the water leaving the vanes into pressure. Without it the impeller spins water around instead of pushing it through the system.
Should I replace the impeller at the same time?
If the impeller is worn enough to warrant changing, the diffuser has run the same hours and is usually worth doing together. The hex head screw for the diffuser is a separate part.
Ask your own question