Heater Coupling Gasket 2" 21619

Heater Coupling Gasket, 2". This is the gasket needed on either side of the flow through spa heater to keep water from leaking into the spa cabinet.  When replacing the spa heater, also replace the 2 heater gaskets.

This gasket fits the two inch heater tailpiece with an indentation to accommodate this seal/gasket.

Get replacement heaters, heater parts and gaskets from Hot Tub Outpost.

This gasket has ridges on both sides.

One side has a larger ridge

The other side has a smaller integrated o-ring.  Very popular heater gasket for 2 inch flow through heaters.

See more heater gaskets and o-rings.

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We also offer heater tailpieces like 2 inch buttress thread x 2 inch slip 417-5040.

Or tailpiece 2 inch buttress x 2 inch spigot/1 1/2 inch slip 417-5160

Or the tailpiece 2 inch buttress thread x 1 1/2 inch slip for split nut 417-2090.  A heater split nut would be 0121108020.

This is a very popular heater gasket used in a wide variety of spas including Clearwater Spas and Divine hot tubs.