GX PUMP GX-E-CS4 Portable PCP Air Compressor, 350W Powerful Motor

⭐ 5/5 Stars — Excellent pump, just needs clearer instructions AND make sure to buy the external water and oil filter by the same brand, to ensure trouble free fills.I found the GXCS-4 really straightforward to set up overall — but there’s one important thing the manual doesn’t make clear enough: it must be oriented upright and topped up with water before you first use it. That guidance really should be front-and-centre in the instructions, so I’d love to see that improved in future versions.Other than that, it’s an absolute pleasure to use. Very simple to operate — you dial in exactly the pressure you want, and it cuts off perfectly and reliably every single time. Build quality feels solid and premium, and it fills my PCP air pistol extremely quickly.Really impressed and highly satisfied — would absolutely recommend. ✅

This was not my cheapest purchase but I have to say that I am impressed with the engineering and build quality. This compressor is without doubt a big step up from the traditional "shoe box" style compressors which can burn themselves out in a very short time. The CS4 being water cooled runs very cool and I have found performs very well when topping up my 7Lt dive bottle, taking it from 200 bar to 300 bar in only 39 minutes and never exceeding 37 deg C. It is early days but I get the impression that this machine will last for many years.

I only used once! Works very well

What can I say... nothing short of brilliant.Very quiet indeed. Easy to operate and straightforward controls. I like the double check on the pressure setting device. I just checked it with an external pressure gauge - 230bar - spot on.Filling is easy, I've opted for deionised water and a drop of antifreeze which has anti-corrosion properties - just to be extra careful.Filled my 280cc bottles from empty in no time - used to take me ages by hand.

Very well made product!!

Great air compressor, not sure if its its all but i read a few people including myself the guage reads wrong, mine for example reads 30bar higher than it actually is, kind of a pain but you can work around it.

I got fed up with stirrup pumps instantly. I got fed up with the oxygen tank after a few years of having to keep on refilling it. I ordered this, and it’s great. I can fill my three rifles in a matter of minutes, and get the exact pressure I want. No more bottles and pumps for me.

While it works ok the instructions are useless , there is no customer service and no instructions on how to top up grease or what grease to use once it's empty ! Also so it.says you can tip the divers bottle up ....but again no information on what's needed or how to do it safely ! Filling my divers bottle is why I purchased this ! Knowing what I know now I would of stuck to divers bottle and saved a load of money !

I was looking for a better replacement for my Yong Heng compressor and purchased a GX water separator filter and noticed the filter to be well thought out and built like a tank. I was impressed so much with the filter build and performance I decided to purchase a GX GS4 compressor. Upon opening the packing crate I removed the compressor and read the instruction sheet. Imagine an instruction sheet with a compressor. (Some do-not. have one). I live in Utah wher winters get cold. My compressor would be in my shop so used a 70/30 mix of green antifreeze with distilled water and had a 7 ph factor. I bought the compressor to mainly fill my 6.7 L tank. I started the fill procedure as per directions such as opening the vent to let compressor start then closing vent to prevent the compressor from starting under pressure. 3.4 hours later my carbon fiber 6.7L tank was full at 4350 psi. I shut of compressor but let the coolant flow through the compressor to cool it down. Over the time filling the tank it never got really hot as the coolant radiator and fan worked great to keep it cool. It has a pressure shut off and a back up shut off for safety. The compressor is fairly quiet in its operation. The quality of the build is amazing. It is really built strong and for reliability. It does not struggle to fill the 6.7L tank. Most of the other tanks need a cool down period filling tanks that size. I am not only impressed with its capability, but also the machining, and quality of the unit. The unit will compress air to 5800 psi and has safety devices to keep excess pressures from causing issues. This is a PORTABLE unit and weighs 29 lbs and can run on 12 volts or 110v. It uses 345 watts with compressor on. I tried to save money on lesser quality compressors but they did not perform well or died within a few months. This GX compressor is not that more expensive. It truly is a well made compressor of quality workmanship and design with safety systems and pressure back up switch (2) to keep you safe. I appreciate the safety as well as the unit. NOTE: If you have any high pressure compressors look into the GX Drain Filter as it by far is the best strongest oil and water pcp filter out there. I am not affiliated with GX but after buying the compressor and filter I am and will be a GX customer. Dr.Dave. Utah. UPDATE…. I have been using this compressor filling my AirForce Texan LSS .457 an AirForce Condor SS and Air Venturi Avenger and a SCUBA tank to fill my other pcp airguns out in the field. I have had no problems with the Compressor. I did add a timer to know when I should change oil in the compressor. I would buy this compressor again as it is a workhorse and is quieter than most and coolant cooled so no overheating issues. VERY HAPPY with purchase. Update: This compressor works just like it did when new.. No, Problems or even small issues. Has already outlasted my Yong Heng compressor. I do use the GX Coalescent filter that really stops water from getting into gun or fill tank. I added a battery operated timer to it. That filter is really innovated and works GREAT !!!

Très bon produit à voir dans le temps mais pour l'instant tout fonctionne bien

Excelente compresor. Bien acabado, sencillo de usar, rápido y compacto. Se puede usar con la batería del cocheCarga las botellas de 7l. Sin tener que parar. Poco ruido. Muy contento. No es el más barato pero es muy bueno.

Vlotte levering. Vulde luchtfles 7,5L op 200bar naar 300 bar in Specht 29mim. De Pcp geweren zo in een oogwenk opgeladen,

ottimo compressore adatto sia per rabboccare serbatoi che bombole spedizione rapida