CS4-I Portable PCP Air Compressor, 350W Powerful Motor,Max 5800Psi/40Mpa, Built-in Home Converter, Water and Fans Cooling, 5 Hours Continous Work, 12V Auto Stop Paintball Air Compressor

Buy from GX Pump via official sources with CONFIDENCE, they will stand behind their products. I have already ordered their new high pressure filter system because I trust them to do the right thing when a need arises.Pump works great had a small problem solved quickly by GX pump with a Control Board replacement.Pump builds pressure well, quiet in operation, slow fill rate does not over heat. I have worked on high pressure air and NITROX systems in and out of military. The number one enemy of compressors pumps longevity is excessive heat. This unit controls heat buildup well. Use this unit within its designed duty cycle and I am sure it will provide a long service life before rebuild.I ordered a pump on 27 March 2025 it arrived and would not run for a very long and shut down. It was tried with many options as per technical support via GX Pump. The unit-built pressure on deadhead tests just would not stay running. The failure mode did mode did not match the symptoms of the trouble shooting steps. This was an out of box failure and GX Pump thru its Amazon Official Sales Point replaced unit very quickly. I knew the reputation of these pumps were of high quality and like all factory-built items a poor example slipped thru. The replacement unit arrived quickly via Amazon 4 April 2025 I unboxed it and ran it. The unit had the same build date on tag as the first unit, still I had high hopes. No joy, same indications. Shutdowns happened running on 110 VAC and on 12 VDC. GX Pump Technical support tracked it down quickly to a Control Board (the only common failure point of both voltage modes.) This only affected one supplier Control Board and GX Pump sourced Control Boards that are another supplier (different design see pictures) and sent them out quickly. GX Pump also posted a video instruction on installation quickly.

Compressor was purchased about a month ago and has logged a little over 2 hours of runtime, mostly consisting of .35L bottle and 6.8L tank top offs, not running longer than 20 minutes each time.It developed an issue with the cooling fan, where the fan began running sluggish, and eventually stopped working. Reached out to the manufacturer via email and they quickly addressed the issue by sending out a replacement fan, which was received within 4 days. Very pleased with their customer service.The new fan has been installed and is working so far during a quick on/off test. Time will tell how durable this compressor is as I continue to use it, but I like it's comfortable noise level.

I bought this is an upgrade replacement to my failed CS4 I bought a year and a half ago the Piston went out of it and I didn't want to fix it right now so I ordered this. I am anticipating a long life to it it seems to be better built if you can be and I'm using it everyday probably about 10 times now the guns are high pressure guns and it takes pressure like this to do it we'll see

I bought this to fill my 6.8L air tank to 5200psi and my Karma Red Panda to 5000 psi. The listing says that it can produce 5800 psi. I thought that at the price listed, it would perform. No so.It took over an hour to top off my 6.8L tank from 4500psi to 5200psi.It too more than 40 minutes to fill my 1L tank on my Karma Red Panda from 1700 psi to 5000 psi.That is totally UNSATISFACTORY. No doubt about that!I email the seller for assistant but no response.Additionally it is difficult to set the desired pressure on the gauge.I am returning this.

I don't have s lot of hours on this, but very happy so far.

Works amazing & is very easy to use!

Wow! So quiet!I am coming from the standard GX CS-3, and this is just WILDLY quieter (and faster!) - the reviews here made me wonder if this was a big enough upgrade to be worth double the cost of my old compressor - and yes. yes it is. Far more than 'worth it' this is shockingly quiet in comparison, I would have been happy wtih it being a fair bit louder even.Also the recommendation from folks about the vibration meter to monitor runtime for greasing? genuis. Thank you!