I mostly use them for getting oil pressure readings on simi-hermetic compressors.
The depressor lets me open the valve after connecting the gauge, and close it before removing it, so there is almost no mess made.
I did not know these thumb screw depressors existed. I think I may have to get a few. Any common suppliers carrying them or are they only online?
You need to put the phone down and get back to work!
On the thumb screw ones release the pressure on your hose connection otherwise your oring blows out
Originally Posted by PMARS2345
C & D makes them.
Originally Posted by 76olds
I get them at Johnstone supply.
And watch when you remove them, as already mentioned, the little o-ring can blow out real easy (they include spares).
The ones I linked in my previous post don't have the o-ring blowout issue, because the valve can be back seated.
After disconnecting, you can crack the valve open slightly to slowly release the pressure held in the tube/hose.
They are not the same ones 76olds gave a Johnstone part number for.