Balboa Gecko Spa Heater Gasket O-Ring Seal - Pair

Version: 2x OEM - Balboa Heater Gaskets - PAIR

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Balboa / Gecko heater o-ring gasket seal to fit all Balboa M7 & non-M7 Heaters and many others including GeckoAEware, Hydroquip, Aquatemp, RMF, and others.  May be black, white, or clear material. Should be replaced every few years, or when there has been a chemical balance problem. 

These have been White, Black, or Clear. All are interchangeable, but differ in price.

Two (2) are needed at each end of the heater.

Outside diameter: 74mm
Inside diameter: 53mm
Total Thickness: 6mm 
Square edged O-ring side - diameter of raised ring centre to centre: 63mm 

May Have Part Numbers: 711-4031, 21619, B-21619

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