Therm Products 3 O-Ring Heater Gasket RMG-02-674

3 inch-Inch O-Ring Gasket is a Therm Products heater gasket part. This part is now white, black is no longer available.

3", (2-11/16"ID x 3-5/16"OD x 1/4"Thick)

Outside Diameter    3-5/16"
Inside Diameter    2-11/16"

This heater tailpiece gasket fit the 3" stainless steel heater tubes. This is a combination flat gasket and o-ring that has an actual diameter of 3 1/4" outside and has 2 3/4" oring section inside diameter.

This item is about 1/4" thick but the flat section is about 3/32" thick.

Note this is not a standard 2 inch plumbing oring (which measures about 2 7/8" outer diameter). Plumbing sizes refer to INNER diameter of hose/pipe or heater tube, not the diameter measurement of the gasket itself.

711-4030 is the standard 2 inch heater gasket used with many 2 inch Inner Diameter flow through type spa heaters.

Note since Therm Products is out of business, you may receive an equivalent, same size gasket in white that has the same function and fit as the discontinued gasket.