GX PUMP CS3/CS3-I safety valve kit Replacement
only available in USA
I took my time coming from my target board to the pump. It had stopped a minute or two after filling my rifle to 4k.
I heard a “whoooosh” sound and it dumped all the inline pressure built up. I then tried to fill again and it would not build pressure. Thought maybe a burst disc went but no… it was the safety valve. Tried tightening (helped a little) and then took apart and did not see anything wrong. Was dealing with the slower fill until i saw GX had replacement valves. Bought 2, replaced mine and it works again.