Waterway 865-1000 spa skimmer weir foam for the weir doorWaterway Weir Foam, Spa Skimmer, 865-1000 In stock$1099
Waterway 865-1000 spa skimmer weir foam for the weir door
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Waterway Weir Foam, Spa Skimmer, 865-1000

Ask a questionMPN 865-1000
$1099
In stock
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Quick overview

  • Waterway 865-1000 The factory weir foam for a Waterway spa skimmer weir door.
  • It is the float The foam is what gives the weir door its buoyancy so it tracks the water level.
  • Measured size 5.5" x 2.35" x .85", so it can be checked against the foam you are pulling out.
  • Common wear item Skimmer foam waterlogs and compresses over time, and a flat weir stops skimming properly.
  • Foam only This is the foam insert, not the whole weir door assembly.
  • Quick swap The old foam comes out of the door and the new one goes in, no plumbing involved.
Full description and specifications ↓

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Product details

The Waterway 865-1000 is the weir foam for a spa skimmer. It is the block of closed foam that sits inside the weir door and gives it the buoyancy to ride on the water line.

Why a flat weir stops skimming

The weir door is what concentrates the flow at the surface, so the skimmer skims a thin layer of water instead of drawing from deeper in the spa. That only works while the door floats. Once the foam waterlogs or compresses, the door drops, the surface film stays where it is, and the skimmer can start pulling air.

What you are buying

The foam on its own, measured at 5.5" x 2.35" x .85". Compare it to the piece you take out before fitting, and if the door itself is cracked or the hinge tabs have broken, the door is a separate part.

Specifications
Brand Waterway
Manufacturer part number 865-1000
UPC 806105137869
Type Weir foam
Application Spa skimmer weir door
Dimensions 5.5" x 2.35" x .85"
Shipping weight 0.25 lb
Ships Parcel

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Questions and answers

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

What does the foam actually do?
It floats the weir door. The buoyancy holds the top of the door at the surface so the skimmer keeps pulling the film off the water as the level moves.
How do I know mine is worn?
Waterlogged or crushed foam stops floating the door. If the weir sits low, stays down, or the skimmer draws air and debris, look at the foam first.
Does this include the weir door?
No. This is the foam insert alone, Waterway part 865-1000.
What size is it?
5.5 inches by 2.35 inches by .85 inches, which is worth measuring against the piece you are replacing.
Ask your own question