busa2003 Posted August 26, 2018 Report Share Posted August 26, 2018 Evening all, a quick question. How do you tell how low the pressure is getting in your dive cylinder? just want to see if it’s my full level to low in the dive or the inlet valve is stuck. Either way my Ultra isn’t filling. cheers Quote Link to comment Share on other sites More sharing options...
chrisjpainter Posted August 26, 2018 Report Share Posted August 26, 2018 (edited) Do you mean it won't fill at all, or it won't fill to full pressure? Empty the gun completely (down to 0 bar, not just lower than full power pressure) then fill as per usual. There will be air in it to get it up to some kind of pressure. If it's not filling at all, then it sounds like a stuck valve and the gun's just not accepting any air. Last time you filled it, was it uncharacteristically slow getting up to full pressure? That's an indicator that pressure is low in the dive bottle, as is filling a bit but not being able to get it up to whatever is your max working pressure. Edited August 26, 2018 by chrisjpainter Quote Link to comment Share on other sites More sharing options...
busa2003 Posted August 26, 2018 Author Report Share Posted August 26, 2018 Cheers Chris, sounds like it could be the valve then. Will have a fiddle. cheers Quote Link to comment Share on other sites More sharing options...
Seadog1408 Posted August 26, 2018 Report Share Posted August 26, 2018 Get a contents gauge. mike Quote Link to comment Share on other sites More sharing options...
chrisjpainter Posted August 26, 2018 Report Share Posted August 26, 2018 2 hours ago, busa2003 said: Cheers Chris, sounds like it could be the valve then. Will have a fiddle. cheers Should have said, check it's not the bottle. As long as the bottle is releasing air, you can discount that, so hold the connecting tube tight and release the tap slowly to make sure air is coming out. That'll rule out the bottle being at fault. Quote Link to comment Share on other sites More sharing options...
busa2003 Posted August 26, 2018 Author Report Share Posted August 26, 2018 Bottle is discharging violently!! Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted August 26, 2018 Report Share Posted August 26, 2018 13 minutes ago, busa2003 said: Bottle is discharging violently!! hello, take it to a dive centre A S A P for them to check it out, after all the air is released ? Quote Link to comment Share on other sites More sharing options...
bruno22rf Posted August 26, 2018 Report Share Posted August 26, 2018 Are you new to the rifle? If so then you might find a small grub screw inside the fill probe - supposed to prevent rapid filling but in fact is a pain - if it's there just remove it. Quote Link to comment Share on other sites More sharing options...
busa2003 Posted August 27, 2018 Author Report Share Posted August 27, 2018 Sorry I meant it is discharging at its usual fast pace Had a quick look and the locking ring around the inlet seems stuck so I’m presuming there is something wrong at that end Quote Link to comment Share on other sites More sharing options...
sportsbob Posted August 27, 2018 Report Share Posted August 27, 2018 Cap or plug the outlet from the filling hose and see what the gauge on the cylinder reads. If yo use one of the 8mm quick detach fittings you can buy a plug for a few £. Quote Link to comment Share on other sites More sharing options...
The Burpster Posted August 27, 2018 Report Share Posted August 27, 2018 Sportsbob beat me to it. If you are using Best fittings bits they make a quick connect plug that you can leave in the whip. Close off the bleed valve and open up the main valve and the bottle gauge will tell you what pressure you have remaining. From the symptoms in your OP I might suggest it’s the inlet valve of your PCP that is the issue but my guess is that you have now worked that out? Quote Link to comment Share on other sites More sharing options...
busa2003 Posted August 27, 2018 Author Report Share Posted August 27, 2018 Right, got the valve out. Out came the screw, spring and ball barring, the brass sleeve inside wasn’t and still isn’t going anywhere!! Guess that’s the problem, shopping time. thanks for the help everyone Quote Link to comment Share on other sites More sharing options...
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