Small Leak ?

[n8do99]

looking at the veloscity nut,, on the left side of the marker therre is a little pin hole in my x-valve. when i gas the marker up it slow leaks out of the hole until my tank pressure drops below 2000. i am running 825-850 to the gun and the marker has a LVx in it. Any suggestions?
thanks

[Snipcod]

How do you control and know how much pressure is going to the gun?

[n8do99]

the out put gage on the reg of my tank

[athomas]

Remove the regulator piston assembly from the back of the valve. Clean it and the valve back. Replace the o-ring around the piston assembly. Add a couple of drops of oil. Replace the parts and gas up the gun.