Hayward DEX2400Z3A air relief valve stem o-ring set of 3Hayward O-Ring for Air Relief Valve Stem, Set of 3, DEX2400Z3A In stock$1899
Hayward DEX2400Z3A air relief valve stem o-ring set of 3
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Hayward O-Ring for Air Relief Valve Stem, Set of 3, DEX2400Z3A

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$1899
In stock
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Quick overview

  • Set of three Supplied as a set, so the stem is fully resealed in one repair.
  • Genuine Hayward Factory part DEX2400Z3A, cut to the original stem grooves.
  • Wide filter coverage Listed for Pro Series side mount sand, Super Star Clear cartridge and Micro Clear DE filters.
  • Stops a spraying air relief Water spitting from the relief valve while the pump runs is normally worn stem o-rings.
  • Cheap fix, common failure The relief valve is opened every time the filter is serviced, and those o-rings take the wear.
  • Filter part A pool filter part that services the air relief valve assembly rather than the filter tank itself.
Full description and specifications ↓

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Product details

Hayward DEX2400Z3A is the o-ring set for the air relief valve stem, supplied as a set of 3. It is the genuine Hayward part.

The failure it fixes

The air relief valve is opened and closed every time the filter is serviced, and the stem o-rings take that wear along with heat and chlorinated water. When they harden or split, the valve leaks with the handle closed. Water spits or sprays from the top of the filter while the pump runs, which owners often mistake for a cracked manifold or a failing tank.

Wide coverage

Hayward uses the same stem seal across several filter families: the Pro Series side mount sand filters, the Super Star Clear cartridge filters in both standard and stainless housings, and the Micro Clear DE filters. That is why the same small o-ring set turns up as the answer on so many different filters.

Before you start

Shut the system down and relieve the pressure before removing the stem. A filter under pressure will not let go of the assembly safely.

Specifications
Brand Hayward
Manufacturer part number DEX2400Z3A
UPC 610377021128
Type Air relief valve stem o-ring
Quantity Set of 3
Part type Pool Filter Part
Fits Hayward Pro Series side mount S-311SX, S-311SXV, S-360SX sand filters
Also fits Hayward Super Star Clear C-2000, C-3000, C-4000, C-4500, C-5000, C-5500 cartridge filters
Also fits, stainless Hayward Super Star Clear stainless C3000S, C4000S
Also fits, DE Hayward Micro Clear DE filters, including stainless steel models
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.

How many o-rings come in this?
It is supplied as a set of 3.
Which filters does it fit?
Hayward Pro Series side mount sand filters S-311SX, S-311SXV and S-360SX, Super Star Clear cartridge filters C-2000 through C-5500, the stainless C3000S and C4000S, and Micro Clear DE filters including the stainless models.
Water sprays out of my air relief valve, is this the part?
Usually. When the relief valve leaks with the handle closed and the pump running, the stem o-rings have hardened or split.
Do I need to drain the filter to change them?
The system has to be shut off and the pressure relieved before the stem comes out. Follow the shutdown steps for your filter before opening anything.
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