Sta-Rite Posi-Flo II PTM 135 cartridge filter tank o-ringSta-Rite Posi-Flo II PTM 135 Cartridge Filter Tank O-Ring, 25230-0010S$3199
Sta-Rite Posi-Flo II PTM 135 cartridge filter tank o-ring
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Sta-Rite Posi-Flo II PTM 135 Cartridge Filter Tank O-Ring, 25230-0010S

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$3199
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Quick overview

  • For the Posi-Flo II PTM 135 The tank o-ring used on this Sta-Rite cartridge filter.
  • Stops a weeping tank A hardened or split o-ring is the usual reason a filter drips at the tank joint under pressure.
  • A service item The tank seal gets disturbed every time the filter is opened for a cartridge clean.
  • Sold on its own Supplied as the o-ring alone, not as part of a larger tank kit.
  • Lubricate on assembly O-rings in a filter tank last longer when they go back in clean and lightly lubricated.
  • Inspect at every opening It costs nothing to look at the seal while the tank is apart, and a lot of time to chase a leak later.
Full description and specifications ↓

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Product details

This is the replacement tank o-ring for the Sta-Rite Posi-Flo II PTM 135 cartridge filter, the seal at the joint where the filter tank comes apart.

What it fixes

A filter that weeps or sprays at the tank joint once the pump comes on is almost always telling you the tank o-ring has gone. The rubber flattens, hardens and eventually splits, and no amount of tightening the clamp will make a dead seal hold.

Fitting

Put the new o-ring in clean and lightly lubricated, and seat it fully before closing the tank. It is worth inspecting the seal every time the filter is opened for a cartridge clean.

Specifications
Brand Sta-Rite
Type Tank o-ring
Fits Sta-Rite Posi-Flo II PTM 135 cartridge filter
Application Filter tank seal
Sold as Single o-ring
Shipping weight 0.02 lb
Ships Parcel

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Questions and answers

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

Which filter does this fit?
The Sta-Rite Posi-Flo II PTM 135 cartridge filter.
My filter drips where the tank comes apart. Is this the fix?
That is the classic symptom of a failed tank o-ring, so yes, this is the part to start with.
Do I get anything else with it?
No. This is the o-ring on its own.
How often should it be replaced?
There is no fixed interval. Inspect it each time the filter is opened and replace it as soon as it looks flattened, cracked or hardened.
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