Pentair 350013Z pump lid o-ring, 5-3/4 in. inside diameterPentair Lid O-Ring, 5-3/4" ID, 350013Z In stock$599
Pentair 350013Z pump lid o-ring, 5-3/4 in. inside diameter
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Pentair Lid O-Ring, 5-3/4" ID, 350013Z

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$599
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Quick overview

  • Genuine Pentair the OEM 350013Z o-ring, not an aftermarket cross reference.
  • Sized for the lid 5-3/4 in. inside diameter with a 1/4 in. cord thickness.
  • Fits four pump families Challenger, WhisperFlo new style, IntelliFlo and select EQ Series commercial pumps.
  • Stops air leaks a flattened or cracked lid o-ring is the usual reason a pump pulls air and loses prime at the strainer.
  • Quick swap lift the lid, pull the old ring out of its groove, seat the new one and close the lid back down.
  • Lube it first a thin film of silicone based o-ring lubricant keeps the ring pliable and helps it seal.
Full description and specifications ↓

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Product details

The Pentair 350013Z is the strainer lid o-ring for the Challenger, the newer style WhisperFlo, the IntelliFlo and select EQ Series commercial pumps. It measures 5-3/4 in. across the inside with a 1/4 in. cord, and it is the genuine Pentair part rather than a generic ring cut to a nearby size.

Why it matters

The lid o-ring is the only thing keeping air out at the top of the strainer pot. When it hardens, flattens or splits, the pump pulls air past the lid, the basket fills with bubbles and the pump loses prime or runs noisy. It is one of the cheapest parts on the pad and one of the most common causes of a pump that will not hold water.

Replacing it

Turn the pump off, open the lid, lift the old ring out of its groove and clean the groove. Coat the new ring lightly with a silicone based o-ring lubricant, seat it evenly and close the lid. If the pump still draws air afterward, look at the suction side unions and the drain plugs next.

Specifications
Brand Pentair
Manufacturer part number 350013Z
UPC 788379657710
Type Pump strainer lid o-ring
Inside diameter 5-3/4 in.
Cord thickness 1/4 in.
Fits Pentair Challenger, WhisperFlo (new style), IntelliFlo, select EQ Series pumps
Shipping weight 0.05 lb
Ships Parcel

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Questions and answers

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

Which Pentair pumps use this o-ring?
The Challenger, the newer style WhisperFlo, the IntelliFlo and select EQ Series commercial pumps. Measure your old ring if you are unsure: it should be about 5-3/4 in. across the inside with a 1/4 in. thick cord.
Does it fit the older WhisperFlo lid?
It is listed for the new style WhisperFlo lid. If your WhisperFlo has the older lid design, check the inside diameter and cord thickness against 5-3/4 in. and 1/4 in. before ordering.
My pump is losing prime. Is this the fix?
Often. When the strainer lid o-ring hardens, flattens or cracks, air gets pulled in at the lid and the pump struggles to hold prime. If you see bubbles in the strainer pot with the lid tight, this ring is the first thing to replace.
Should I lubricate it?
Yes. A light coat of a silicone based o-ring lubricant helps the ring seat, keeps it from pinching and makes the lid easier to open next time. Do not use petroleum based grease.
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