I previously posted this on the filter, pump section not knowing that there was an "everything else" section that includes heaters....I apologize for the re-post.
I have a hayward h400 ed1 and the on/off/pilot knob is broken. It has a Robert Shaw gas valve and the closest part that I have come that matches what I have is:
My knob doesn't have the screw, it's held in place on a semi-circle prong coming from the gas valve which matches what's on the other side of the knob, sort of like a knob on a stove. I hope I'm making sense....I can't find it anywhere on the Internet, does anybody have any ideas where I can get one?