Scubapro chrome plated brass regulators...

[rsingler]

Nice videos. Am going to put some thoughts together, shortly.

In the meantime, even though all seems tight (no pressure drop with tanks off x hours), how about buttoning up all the ports and pressurizing it and holding the reg and tank neck in the sink for a bit to check for micro leaks? You'll have to depressurize by unscrewing a port, but since it is stable so far, there should be minimal risk.

Then, as @couv suggested above, put an IP gauge directly on a port, with no hose or second stage and see what IP does.

 

[Open Ocean Diver]

Nice videos. Am going to put some thoughts together, shortly.

In the meantime, even though all seems tight (no pressure drop with tanks off x hours), how about buttoning up all the ports and pressurizing it and holding the reg and tank neck in the sink for a bit to check for micro leaks? You'll have to depressurize by unscrewing a port, but since it is stable so far, there should be minimal risk.

Then, as @couv suggested above, put an IP gauge directly on a port, with no hose or second stage and see what IP does.

OK I’ll do both as suggested. Thanks

 

[Open Ocean Diver]

Nice videos. Am going to put some thoughts together, shortly.

In the meantime, even though all seems tight (no pressure drop with tanks off x hours), how about buttoning up all the ports and pressurizing it and holding the reg and tank neck in the sink for a bit to check for micro leaks? You'll have to depressurize by unscrewing a port, but since it is stable so far, there should be minimal risk.

Then, as @couv suggested above, put an IP gauge directly on a port, with no hose or second stage and see what IP does.

Ready to go, A little nervous I've never plugged up a regulator without an OPV before. Yikes

 

[Open Ocean Diver]

Nice videos. Am going to put some thoughts together, shortly.

In the meantime, even though all seems tight (no pressure drop with tanks off x hours), how about buttoning up all the ports and pressurizing it and holding the reg and tank neck in the sink for a bit to check for micro leaks? You'll have to depressurize by unscrewing a port, but since it is stable so far, there should be minimal risk.

Then, as @couv suggested above, put an IP gauge directly on a port, with no hose or second stage and see what IP does.

10 min in the water no bubbles.

 

[Open Ocean Diver]

25 min no leaks.

With the IP test I don’t have the fittings to directly connect to the port without a hose, I thought I did.

 

[Open Ocean Diver]

25 min no leaks.

With the IP test I don’t have the fittings to directly connect to the port without a hose, I thought I did.

Ip test on a short inflater hose 137 steady, all other ports plugged.

 

[saxman242]

Those machined Ti yoke connectors are so ridiculously over-designed. Ha!

 

[Open Ocean Diver]

Those machined Ti yoke connectors are so ridiculously over-designed. Ha!

You gotta love the curves.

 

[saxman242]

You gotta love the curves.

I don't think I could resist the temptation to anodize the outside of it, just to make those curves pop.

 

[rsingler]

With no leaks underwater, your piston shaft HP seal is good, and your piston ring (LP) is good.

With a steady IP, your HP seat and the knife edge is good.

So to me, the first stage is fine.

Next thing I'd try is to change the amounts of suction pump rpm and air bleed, and see if that eliminates the resonance. From your video, it sounded like you could try both higher and lower rpms on the pump. I don't know if you have similar latitude in your flowmeter.