Waterway 711-4030 2 inch heater o-ring gasketWaterway 2" Heater O-Ring/Gasket, 711-4030 In stock$499
Waterway 711-4030 2 inch heater o-ring gasket
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Waterway 2" Heater O-Ring/Gasket, 711-4030

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$499
In stock
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Quick overview

  • Waterway part 711-4030 The factory 2 inch heater o-ring gasket, ordered by number rather than by eye.
  • Ribbed profile The ring carries a rib, so its total thickness is greater than the flat section on its own.
  • Outside diameter 2-15/16 in. Check the old ring against this figure before ordering.
  • Inside diameter 2-1/8 in. Sized to sit on a 2 inch connection.
  • Flat section 3/32 in. The flat part of the ring measures 3/32 inch thick.
  • Total thickness 3/16 in. Measured across the ring including the o-ring extension.
Full description and specifications ↓

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Product details

The Waterway 711-4030 is the 2 inch heater o-ring gasket. It measures 2-15/16 inch across the outside and 2-1/8 inch across the inside.

The two thickness figures

This ring is made with a rib rather than as a plain flat gasket, which is why the specification carries two thicknesses. The flat section is 3/32 inch. Measured across the whole ring, including the o-ring extension, it is 3/16 inch. If you are comparing against a ring you already have in hand, measure the flat part to make the match.

When to change it

A union gasket is cheap and the leak it causes is not. Once the old ring has taken a set, gone hard or split, it will not seal again no matter how much the union is tightened, so it is worth replacing whenever the connection is opened.

Specifications
Brand Waterway
Manufacturer part number 711-4030
UPC 806105124593
Type 2" heater o-ring/gasket
Profile With rib
Outside diameter 2-15/16"
Inside diameter 2-1/8"
Thickness, flat section 3/32"
Thickness, total including o-ring extension 3/16"
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.

What size is this gasket?
2-15/16 inch outside diameter, 2-1/8 inch inside diameter. The flat section is 3/32 inch thick and the total thickness including the o-ring extension is 3/16 inch.
Why are two thicknesses listed?
The ring is ribbed. One figure is the flat section on its own, the other is the full thickness with the o-ring extension included.
Is this a genuine Waterway part?
Yes, it is Waterway 711-4030.
When should it be replaced?
Any time the union is opened, and immediately if the old ring is flattened, cracked or hard, since that is what starts a drip at the connection.
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