Hayward SX200G manual air relief cap for side mount sand filtersHayward Manual Air Relief Cap, SX200G In stock$1799
Hayward SX200G manual air relief cap for side mount sand filters
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Hayward Manual Air Relief Cap, SX200G

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$1799
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Quick overview

  • Genuine Hayward Part SX200G, also listed as the air relief knob.
  • Bleeds trapped air Opening the cap lets air out of the filter tank after priming or servicing.
  • O-ring not included The sealing o-ring is a separate purchase, so add one if yours is flat or cracked.
  • Side mount sand filters Fits the Hayward S-200 and S-240 and the Pro Series side mount range.
  • Pro Series Plus too Also listed for the S-311SX, S-311SXV and S-360SX filters.
  • Cheap fix for a wet tank top A cracked or cross threaded cap weeps at the top of the filter and takes minutes to swap.
Full description and specifications ↓

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Product details

The Hayward SX200G is the manual air relief cap, also listed as the air relief knob, for Hayward side mount sand filters. It is the knob you open to bleed trapped air out of the filter tank.

Why you bleed the filter

Air collects at the top of the tank whenever the pump has been opened, primed or run dry. Trapped air cuts flow and can make the tank knock. Opening the relief cap with the pump running lets the air out until water comes through, and then it is closed again.

Order the o-ring with it

The sealing o-ring is not included and has to be bought separately. If the cap has been weeping, the o-ring is almost always flat or cracked too, so it is worth having both in hand before you start.

Fitment

The cap covers the Hayward S-200 and S-240 sand filters along with the Pro Series and Pro Series Plus side mount range.

Specifications
Brand Hayward
Manufacturer part number SX200G
UPC 610377054706
Type Manual air relief cap
Part type Pool filter part
Included Cap only, o-ring sold separately
Fits Hayward S-200, S-240; Pro Series side mount S-210S, S-220S, S-244S, S-310S, S-360S; Pro Series Plus S-311SX, S-311SXV, S-360SX
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.

Is the o-ring included?
No. The o-ring is not included and must be bought separately.
Which filters does this cap fit?
The Hayward S-200 and S-240 sand filters, the Pro Series side mount S-210S, S-220S, S-244S, S-310S and S-360S, and the Pro Series Plus S-311SX, S-311SXV and S-360SX.
Is this the same as the air relief knob?
Yes. Hayward SX200G is listed both as the manual air relief cap and as the air relief knob.
How do I use it?
With the pump running, open the cap until the trapped air hisses out and water appears, then close it again.
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