
Quick overview
- Fits all residential models Pentair lists this kit for the residential BioShield UV sterilizer across all models.
- Genuine Pentair Factory part 523031, matched to the sealing surfaces in the BioShield body.
- Service the seals together A kit rather than single rings, so every seal disturbed during a service goes back new.
- Do it with the lamp change The sensible time to fit fresh o-rings is when the sleeve or lamp is already out.
- Protects the electrics The o-rings are what keep pool water out of the lamp end of the sterilizer.
- Consumable part Rubber hardens with heat and time, so seals are a scheduled item rather than a failure item.
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Product details
The Pentair 523031 is the o-ring service kit for the residential BioShield UV sterilizer. Pentair lists it for all residential BioShield models.
What it covers
A UV sterilizer seals pool water around a quartz sleeve with the lamp running dry inside it. The o-rings are the only thing keeping those two worlds apart, and they take heat every hour the system runs. Supplying them as a kit means every seal you disturb during a service goes back new instead of being reused because it looked fine.
When to use it
Fit the kit whenever the sleeve or lamp comes out. Reusing hardened o-rings after a lamp change is the most common reason a BioShield weeps afterwards. The lamp and the quartz sleeve themselves are separate Pentair parts.
| Brand | Pentair |
|---|---|
| Manufacturer part number | 523031 |
| UPC | 788379875862 |
| Type | O-ring service kit |
| Application | UV sterilizer seal kit |
| Fits | Pentair residential BioShield UV sterilizer, all models |
| Shipping weight | 0.6 lb |
| Ships | Parcel |
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