Regulator question - sanity check...

[packersrule729]

Hey all

Working on a CCM reg that has a slighttttt leak down the 3/16th reg adjustment set screw. We're talking 1k PSI leak every 8 hrs, but enough to piss me off.

Brand new internals from CCM, new o-rings, applied grease to the piston seat o-ring (113), yet still having the leak.

It HAS to be the piston seat that would cause a leak in the lower housing via the set screw, right?

The other hypothesis I've heard as well is the inner wall of the actual lower housing itself is grooved/damaged, allowing a slight air leakage.

I think my next step is to try a larger o-ring on the piston seat (114 vs. standard 113), but wanted to get input from the brains here first.

Thanks in advance.

[Chuck E Ducky]

Is the bore scored or pitted?

This is the one you just got with the fancy Ano?

Your using grease right? Try some Dow 55 on it.

[packersrule729]

To the naked eye, no—no scouring or pitting I can visibly see.

I’ve been using Dow 33 but will try Dow 55

[Chuck E Ducky]

55 swells the oring a lil bit I use it on stuff I can’t get to seal up

[packersrule729]

Makes sense. I’ll try it