Pentair 357099Z square ring for the seal plate on Max-E-Pro and IntelliPro pumpsPentair Square Ring, Seal Plate, Max-E-Pro / IntelliPro, 357099Z In stock$1999
Pentair 357099Z square ring for the seal plate on Max-E-Pro and IntelliPro pumps
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Pentair Square Ring, Seal Plate, Max-E-Pro / IntelliPro, 357099Z

Ask a questionMPN 357099Z
$1999
In stock
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Quick overview

  • Seal plate square ring Seals the joint at the seal plate rather than a round o-ring groove.
  • Max-E-Pro and IntelliPro Listed for both pump families.
  • Two part numbers Sold as Pentair 357099Z and also listed as replacement part U9-228A.
  • Square section A square ring seats flat in its groove and does not roll the way a round ring can.
  • Cheap insurance A hardened ring is a common source of a weep at the seal plate joint.
  • Fit it during a reseal The seal plate has to come off for a shaft seal change, so the ring is worth doing at the same time.
Full description and specifications ↓

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Product details

The Pentair 357099Z is the square ring that seals at the seal plate on Max-E-Pro and IntelliPro pumps. Pentair also lists it under replacement part number U9-228A.

What a square ring does

A square section ring seats flat in its groove and holds its position under clamping load. That gives a wide, even contact face at the seal plate joint. Over seasons the rubber hardens and takes a set, and the joint starts to weep. A fresh ring restores the seal.

When to fit it

The seal plate has to be separated from the volute to reach the shaft seal, so a pump that is already apart for a seal change is the natural moment to renew this ring rather than reuse a compressed one.

Specifications
Brand Pentair
Manufacturer part number 357099Z
UPC 788379507282
Alternate part number U9-228A
Type Square ring, seal plate
Fits Pentair Max-E-Pro and IntelliPro pumps
Shipping weight 0.12 lb
Ships Parcel

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Questions and answers

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

Which pumps use this ring?
It is listed for the Max-E-Pro and IntelliPro pump families.
Is U9-228A the same part?
It is given as the replacement part number for 357099Z, so the two are cross referenced to each other.
Why square and not round?
A square section ring sits flat in its groove and stays put. Fitting a round o-ring in its place can leave the joint sealing on a smaller contact area.
Should I replace anything else while I am in there?
The seal plate comes off for a shaft seal change, so if the pump is apart for a seal, the diffuser and the pump lid o-ring are the usual companions.
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