PabloCruise
SILVER Star
We stock the purge valve and can likely help you sort the leak too. 15 minutes of pressure isn't exactly ideal in fact we test all of ours for zero loss (with occasional spins) over the course of an hour or so at 120 psi. Where did the ARB come from?
Having a "squirrel" moment when I read "square cross-section o-rings": Cruiser Outfitters
When I tried to rebuild a set of ASCO lock-outs, the dial used a square cross-section o-ring. Any chance you have those?
Sorry Ron...