Review on 🔝 Optimized GX H-4 PCP Hand Pump with Oil-Moisture Filter, Enhanced 3.5 Stage High Pressure 30Mpa/4500Psi Air Rifle Filling Stirrup Pump, Stainless Steel Body for Paintball, PCP & Scuba Diving by Tommy Hilmy

I've had cheaper pumps and this one isn't one of them. This is upgraded equipment. I actually used it to inflate a 1.5 liter pony bottle. I wouldn't normally recommend this - it's a real workout. You should really use this to fill the gutter yourself. Suffice it to say, you can get to 4500 psi faster than you might think. Requires significant clamping force. Probably in the 150-180 lb range. The desiccant works and helps reduce water vapor in the system. However, I cannot underestimate the need to periodically pause and stop the pump and even relieve the pressure with a relief valve. Understand that going to 4500 psi means the ambient air is being compressed at a 300:1 ratio. No matter how little water is in it, such pressure displaces water. All this is arranged in such a way that water collects in the lower chamber next to the safety valve. Periodic opening is necessary for its forcing. When pumping, care must be taken not to overheat. Especially when you hit your target print. A lot of energy is wasted! Once at the top I like to take a few minutes break every 100 strokes. end of the filling.