I have a Raypak heater that is leaking at the point where the PVC pipes from the pool attach to the heater. The pipes are secured with two screw-on collars obviously meant to be hand tightened, but if they were King Kong did the installation.
I think this is a simple matter of unscrewing the collar, replacing the seal, and maybe liberal application of some Teflon tape. However, I can't budge the collars. The pipes are big, maybe 3", and that is bigger than my largest pipe wrench, channel locks, etc.
How the heck do you get these things loose? Is there a special tool I should look for?