Pentair 355617Z diffuser for SuperFlo and SuperMax pumps, 1/2 HP through 1 HPPentair SuperFlo Diffuser, 1/2 HP Thru 1 HP, 355617Z In stock$8899
Pentair 355617Z diffuser for SuperFlo and SuperMax pumps, 1/2 HP through 1 HP
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Pentair SuperFlo Diffuser, 1/2 HP Thru 1 HP, 355617Z

Ask a questionMPN 355617Z
$8899
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Quick overview

  • Genuine Pentair The factory 355617Z diffuser, not a generic substitute.
  • Covers three pump families Listed for the SuperFlo, the SuperMax and the Pinnacle High Flow inground pump.
  • Directs the flow The diffuser channels water off the impeller into the volute, and a cracked one bleeds pressure back around itself.
  • Rating range Fitted to 1/2 HP full rated through 3/4 HP full rated and 1 HP up rated pumps.
  • Bigger pumps differ Pumps above this range take the 1-1/2 HP through 2 HP diffuser instead, so read the motor plate.
  • O-ring and screw The diffuser o-ring and the hex head screw that holds it are separate parts and are worth refreshing together.
Full description and specifications ↓

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Product details

The Pentair 355617Z is the diffuser for SuperFlo and SuperMax pool and spa inground pumps and the Pinnacle High Flow inground pump, in the smaller horsepower range. It is the genuine Pentair part.

What a diffuser does

The diffuser sits over the impeller and shapes the water leaving it, converting the speed the impeller creates into usable pressure as the flow enters the volute. When the diffuser cracks or its sealing face wears, water recirculates inside the wet end instead of going out to the filter, and the pump loses performance without any obvious noise.

Match your pump rating

This part covers the smaller end of the range. The listing title gives 1/2 HP through 1 HP, and the detail line reads 1/2 HP full rated through 3/4 HP full rated plus the 1 HP up rated pump. Check the motor plate against both. Pumps rated above this range take the separate 1-1/2 HP through 2 HP diffuser.

Do the small parts too

The diffuser o-ring and the hex head screw that holds the diffuser in place are separate items. Both are cheap, both are already exposed once the wet end is open, and a hardened o-ring will leak past a brand new diffuser.

Specifications
Brand Pentair
Manufacturer part number 355617Z
UPC 788379658953
Type Diffuser
Horsepower range 1/2 HP full rated through 3/4 HP full rated, and 1 HP up rated
Fits Pentair SuperFlo, SuperMax, and Pinnacle High Flow inground pumps
Also listed for Sta-Rite SuperMax pumps
Part type Pool pump part
Shipping weight 0.4 lb
Ships Parcel

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Questions and answers

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

Which pumps does this diffuser fit?
It is listed for the Pentair SuperFlo and SuperMax pool and spa inground pumps and the Pinnacle High Flow inground pump.
What horsepower range does it cover?
The listing title gives 1/2 HP through 1 HP. The detail line reads 1/2 HP full rated through 3/4 HP full rated, plus the 1 HP up rated pump. Check your motor plate against both readings.
My pump is bigger than that. What do I need?
Pentair lists a separate SuperFlo and SuperMax diffuser for the 1-1/2 HP through 2 HP pumps.
Should I replace the o-ring at the same time?
Yes. The diffuser o-ring and the hex head screw that retains the diffuser are sold separately, and a tired o-ring will undo the benefit of a new diffuser.
Ask your own question