Pentair 35505-1246 index plate o-ring for Sta-Rite WC212-134 valvePentair Index Plate O-Ring, 35505-1246 In stock$1399
Pentair 35505-1246 index plate o-ring for Sta-Rite WC212-134 valve
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Pentair Index Plate O-Ring, 35505-1246

Ask a questionMPN 35505-1246
$1399
In stock
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Quick overview

  • Genuine Pentair Factory part 35505-1246, not a generic ring cut to a similar size.
  • Index plate seal Sits on the index plate of the valve, where a hardened ring lets water pass.
  • Sta-Rite WC212-134 Listed for the WC212-134 plastic push pull valve.
  • May suit other valves The source record notes it can fit other valve models, so match the old ring before ordering.
  • Cheap insurance Rubber goes flat and brittle with age, and a fresh ring costs far less than chasing a leak.
  • Change it with the service Worth replacing any time the valve is opened rather than reusing a set ring.
Full description and specifications ↓

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Product details

This is the Pentair 35505-1246 o-ring for the index plate inside a Sta-Rite WC212-134 plastic push pull filter valve. It is the genuine part, not a hardware store ring picked for a close size.

What goes wrong

The index plate ring spends its life squeezed between two surfaces with pool water on one side of it. Over the seasons the rubber takes a set, loses its spring and then hardens, and the seal that used to be tight starts letting water slip past the plate. The symptoms are usually water going where you did not send it, or a valve that never feels quite sealed no matter how it is set.

Fit

Our record lists it for the Sta-Rite WC212-134 plastic push pull valve and notes it may fit other valve models. Because it is sold by part number and not by measurement, compare it against the ring you pull out before you rebuild the valve.

Replace rubber whenever the valve is open. A ring that looks acceptable but is already several years old will usually be the reason you are back in the same valve next season.

Specifications
Brand Pentair
Manufacturer part number 35505-1246
UPC 788379778309
Type Index plate o-ring
Fits Sta-Rite WC212-134 plastic push pull valve
Note May fit other valve models
Shipping weight 0.01 lb
Ships Parcel

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Questions and answers

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

What does this o-ring seal?
The index plate inside the valve. When it flattens or hardens, water gets past the plate instead of following the port you selected.
Will it fit a valve other than the WC212-134?
Possibly. Our record lists it for the Sta-Rite WC212-134 and notes it may fit other valve models, so compare it against the ring you are replacing.
Is this a genuine part?
Yes. It is the OEM ring, part number 35505-1246.
Should I lubricate it on assembly?
A thin film of a pool rated silicone o-ring lubricant helps the ring seat without pinching. Petroleum grease attacks rubber, so avoid it.
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