Pentair 35505-1318 piston assembly O-ring for Sta-Rite push pull valvesPentair Piston Assembly O-Ring, 35505-1318 In stock$1599
Pentair 35505-1318 piston assembly O-ring for Sta-Rite push pull valves
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Pentair Piston Assembly O-Ring, 35505-1318

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$1599
In stock
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Quick overview

  • Fits the WC212-134 piston Made for the piston of the Sta-Rite WC212-134 push pull valve.
  • 2-1/2 inch inside diameter Measure the old ring before ordering if you are unsure which valve you have.
  • May suit other Sta-Rite valves The same ring can fit other Sta-Rite valves, so the inside diameter is the check that matters.
  • Original part number Listed under 35505-1318.
  • The usual cause of a leaking slide valve A hardened or nicked piston O-ring lets water past the piston instead of sealing it.
  • Cheap part, big effect Renewing the piston O-ring is the first thing to try before replacing a whole valve.
Full description and specifications ↓

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Product details

The Pentair 35505-1318 is the piston assembly O-ring for the Sta-Rite WC212-134 push pull valve. It has a 2-1/2 inch inside diameter and may also fit other Sta-Rite valves.

What it fixes

A push pull valve seals by sliding a piston through a bore, and it is the O-rings on that piston that make the seal. When one hardens, flattens or picks up a nick, water bypasses the piston, and the symptom is a valve that no longer isolates properly in one or both positions.

Fitting it

Measure the inside diameter of the old ring against the 2-1/2 inch figure to confirm the match. A silicone based O-ring lubricant on assembly helps the ring seat cleanly and stops it tearing as the piston goes home.

Specifications
Brand Pentair
Manufacturer part number 35505-1318
UPC 788379830328
Type Piston assembly O-ring
Inside diameter 2-1/2 in.
Fits Sta-Rite WC212-134 push pull valve, may fit other Sta-Rite valves
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 valve is this for?
It is designed to fit the piston of the Sta-Rite WC212-134 push pull valve, and it may fit other Sta-Rite valves.
What size is it?
The inside diameter is 2-1/2 inches.
How do I know this is the ring I need?
Pull the piston and measure the inside diameter of the old ring. At 2-1/2 inches inside diameter this is the match.
Should I lubricate it on assembly?
A silicone based O-ring lubricant on installation helps the ring seat and slide without tearing, which is what usually kills a new one early.
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