Balboa / Gecko heater o-ring gasket seal to fit all Balboa M7 & non-M7 Heaters and many others including Gecko, AEware, 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.
One needed at each end of the heater, so two is required for a "set."
- 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
- Gecko Microspa, SSPA, MSPA and others
- Balboa GS, GL, EL, BP, Dominator and many others
Oring, o ring