Pentair 400010Z Whisperflo XF 3HP pump diffuserPentair Whisperflo XF 3HP Diffuser, 400010Z In stock$8899
Pentair 400010Z Whisperflo XF 3HP pump diffuser
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Pentair Whisperflo XF 3HP Diffuser, 400010Z

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$8899
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Quick overview

  • Genuine Pentair part The factory 400010Z diffuser for the XF series wet end.
  • Fits three pump families Listed for WhisperFloXF, IntelliFloXF variable speed and Sta-Rite 2 and 3 HP pumps.
  • Directs flow to the impeller The diffuser is what turns impeller velocity into usable pressure at the discharge.
  • A quiet cause of lost flow A cracked or worn diffuser lets water recirculate inside the volute instead of leaving the pump.
  • Serviced with the seal Getting to the diffuser means opening the wet end, so the shaft seal and o-rings are worth checking at the same time.
  • Direct replacement Drops into the existing wet end in place of the original diffuser.
Full description and specifications ↓

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Product details

The Pentair 400010Z is the XF series pump diffuser, listed for the WhisperFloXF and IntelliFloXF variable speed pumps and for Sta-Rite 2 and 3 HP pumps. It is the genuine Pentair replacement.

What the diffuser does

The impeller throws water outward at speed. The diffuser sits over it and converts that velocity into pressure, funneling flow into the volute and out the discharge. It also sets the close running clearance around the impeller eye. When that clearance opens up, or the diffuser body cracks, water simply circulates inside the pump instead of leaving it, and the pump loses head while still sounding perfectly normal.

Fitting

Reaching the diffuser means opening the wet end, which is the right moment to look at everything else in there. Check the diffuser o-ring, the shaft seal and the impeller for wear before reassembly, and replace anything questionable while the pump is apart.

From Pool School

How to Prime a Pool PumpFrom the breaker to a full pot, each manufacturer's time limit, and what to check when it won't catch prime. Read Replace the Pool Pump Motor or the Whole Pump?The manufacturers' tests first, what each repair replaces, and the federal motor rule. Read
Specifications
Brand Pentair
Manufacturer part number 400010Z
UPC 788379807672
Type Pump diffuser
Series XF series
Rating 3 HP
Fits Pentair WhisperFloXF, Pentair IntelliFloXF variable speed, Sta-Rite 2 and 3 HP pumps
Shipping weight 0.9 lb
Ships Parcel

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Questions and answers

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

Which pumps take this diffuser?
It is the Pentair XF series diffuser, listed for WhisperFloXF, IntelliFloXF variable speed and Sta-Rite 2 and 3 HP pumps.
Is this a genuine Pentair part?
Yes. It is Pentair part number 400010Z, the factory diffuser.
How do I know the diffuser is the problem?
A pump that primes and runs but moves less water than it used to, with no clogged basket and no suction leak, often has a cracked diffuser or a worn diffuser to impeller fit.
What else should I replace while I am in there?
The wet end has to come apart to reach the diffuser, so inspect the diffuser o-ring, the shaft seal and the impeller before you close it up.
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