Pentair 523375 BioShield union assembly for models 522935 to 522937Pentair BioShield Union Assembly for Models 522935 to 522937, 523375 In stock$5699
Pentair 523375 BioShield union assembly for models 522935 to 522937
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Pentair BioShield Union Assembly for Models 522935 to 522937, 523375

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$5699
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Quick overview

  • Genuine Pentair Factory part number 523375 for the BioShield.
  • Replaces 523122 Pentair lists this assembly as the replacement for the earlier 523122.
  • Fits 522935 to 522937 Listed for the BioShield models in that range.
  • Complete union assembly Supplied as an assembly rather than as separate union halves.
  • The plumbing connection The union is how the unit joins the pipework, and it is what you break loose for service.
  • Sealing surfaces wear A union that will not seal after retightening needs replacing, not more force.
Full description and specifications ↓

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Product details

The Pentair 523375 is the union assembly for the BioShield, listed for models 522935 through 522937. It is the genuine Pentair part, and it is the replacement for the earlier 523122.

What the union does

The union is the connection between the unit and the pipework. It is the joint you break loose whenever the unit has to come out for service, which means it gets handled far more than the rest of the plumbing and its sealing faces take the wear.

When to replace it

A union that still weeps or pulls air after it has been properly seated and retightened is done. Cranking harder on a tired union tends to crack the collar rather than seal it, so fitting a fresh assembly is the right call.

Specifications
Brand Pentair
Manufacturer part number 523375
Type Union assembly
Fits Pentair BioShield models 522935 to 522937
Replaces 523122
Ships Parcel

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Questions and answers

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

Which models does this fit?
Pentair lists it for BioShield models 522935 through 522937.
Is this the same as 523122?
It is the replacement for 523122. If you have been looking for that number, this is the current assembly.
What is included?
The union assembly, supplied as an assembly.
When should I replace the union?
When it drips or draws air after being properly retightened, or when the sealing face or threads are visibly damaged. Tightening harder on a worn union usually cracks it.
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