GX PUMP GX-E-CS4 PCP Air Compressor, 350W Powerful Motor,Max 5800Psi/40Mpa

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 !!!

I'm absolutely thrilled with my new GX-E-CS4 pcp air compressor. As an avid air gunner, I was in the market for a reliable, high-performance pump that could handle my needs, and this one has exceeded my expectations. One of the standout features for me is the ability to pump up to 400 bar. I own a Huben GK1 air pistol that is rated for up to 350 bar, so having that extra headroom is fantastic. I can now fill my pistol to its max capacity without any issues. The compressor handles the task with ease, and I'm impressed by how quickly it can fill even my larger air cylinders. Another feature I really love is the water cooling system. I've had troubles in the past with other pumps overheating when filling larger volumes, but the GX-E-CS4 stays cool and composed even when I'm filling my 6 liter bottle. It's so convenient to be able to top up my air reserves without having to worry about the pump conking out. The price of this compressor is also amazing considering all the functionality and performance it offers. I was a bit hesitant at first, but after using it extensively, I can say with confidence that it's worth every penny. Finally, I have to mention the stellar customer service I received. I had a minor issue pop up, and the company was quick to diagnose the problem and send me a replacement part. Their responsiveness and willingness to stand behind their product is refreshing. Overall, I highly recommend the GX-E-CS4 to any PCP air gun enthusiast. It's a game-changer!

I really like this compressor. It a set the pressure stop, turn it on and forget about it. I was worried at first and didn't trust the automatic stop, but after a hundred or so fill ups, it works perfect. Its accurate too. I have it set at 3k psi and it matches the small handful of PCP airguns gauges. Fill time is plenty quick in my opinion and the decibel level is bearable enough to run inside the house. It's quieter than my shop compressor by a wide margin. I bought Amazons extended warranty which makes it the best insured value for a compact compressor on the market. If I was to have one complaint, its that the external power inverter doesn't have an on/off switch. I continuously have to plug and unplug it in for use. I'll be buying a switched power strip to solve the annoyance. But other than that, this compressor is great. I'm glad I invested in it for my hobby and would do it over again without hesitation. If you're on the fence abut such a large purchase, if you commit, you'll be happy you did. It's made filling my tanks and PCP's so easy.

Used this compressor a couple of times to fill my PCP and, wow. Great quality, worked right out of the box, no leaks, no problems. Haven’t used long term yet, but so far so good. Some stuff no one has mentioned/ details: 1) The instructions are pretty good, and state that the air coming out of it is dry and suitable for breathing purposes. I wouldn’t, but that is what it says. It gives detailed instructions for first time and then repeat startup procedures, and is written in readable English. It also has a full exploded parts diagram and parts list. 2) I went with a no-compromises set up, with an additional oil-water separator and an additional in-line drier and they *don’t seem to be necessary*. The compressor has a built in oil-water separator that works quite well! After filling, the bleed on my extra external oil-water separator was bone dry, and the bleed on the compressor itself spat out water as expected. I cautiously say you don’t really need an additional moisture solution if you live in dry or semi-dry climate. 3) The air hose it comes with are standard air rifle Foster type quick-connects on both ends 4) It wasn’t clear but the water cooling is actually a small very good functioning radiator and water pump. I was worried it might have just been a water jacket for the thermal mass, but that is not the case. The instructions say over and over to fill the water first before turning it on. Mine actually came with the water reservoir about half full of water already, so even if you were dumb and didn’t fill it, it probably wouldn’t have ruined the water pump outright. 5) The AC-DC converter appears to be of good quality and works well so far. 6) Comes with a quick-connect plug for the air line, and instructions that with the plug in place you should get 250 bar in 38 seconds or so. I confirmed this. 7) Took about 10 minutes to fill my ~600 mL bottle from 100 to 250 bar, including the extra volume of the external oil-water separator and big drier. It would probably be a lot faster without the extra volume, as stated above in point #2. Since I have them, though, I will continue to use them. 8) The automatic shut off with double-redundancy is, in my opinion, a critical safety feature. I couldn’t imagine filling a potentially dangerous high-pressure air device without one. 9) Manual states it can be used vertically or horizontally, in case that matters to you.

I bought this in early 2024 and have used it almost every two weeks since the purchase. I wanted to give it time since I've had several similar pumps fail within a year's time frame or within a couple of months. This unit although it was a little bit more expensive was well worth the money. This thing is Rock Solid so far and shows no signs of failures and has been extremely quiet and efficient. I would highly recommend this to anybody looking for this type of equipment.

Ive only had the pump for a few days. I was tires of the down time and everything else involved in filling bottles. My main use of my PCP is target shooting and pest control on my property. Filling my PCP directly from the pump seemed much easier. So for I've very happy. Its quck and easy to use and it meets all my expectations. Setup and use the first time was a little intimidating but its very straight forward and I highly recommend the setup.

Received a unit that was probably returned but it works. It requires coolant before starting, mine was completely empty when I received it. It doesn't or didn't come with any manual. Just a single page introduction guide. It is very quiet compared to the Yong heng compressors. It fills slightly slower but not that much. The running rpms are much slower so it should last alot longer than the YH. There seems to be less heat generated so no exterior cooling water is needed. I do not like the external transformer which seems like a hazard with exposed connections. The service line is too short and current quick disconnect fitting will not service BRK rifles and too short for FX rifles.(gets stuck) other than that it performs well. I also purchased the Asurion extended warranty which is a must. Late entry after 48 hrs of run time. Noticed it was having problems pumping pass 220 bar. I thought maybe piston going bad. But after checking, found service line connections were leaking. Changed out some o-rings and back in business. This pump is very durable compared to the cheap Y.H compressors I use to purchase. I later purchased the higher model without the transformer and keep this for back up. I'm a daily shooter and I put alot of stress on my compressors but I think these will keep me going for years.(New one even quieter).

Strong quiet and fast

Excellent product. It achieves effortlessly 300 Bar, needed for my PCP gun. I had some questions and the producer promptly answered everything. Top post-sale support. The compressor works on 12V and on 220V as well. It is rather heavy and seems professionally built and for heavy duty work.

I needed 350 bar for my air gun it this compressor reaches that easily with 50 bar to spare so it shouldn’t ever have to work to it’s maximum which must be a good thing. It appears to be well built and everyone that leaves a review is very pleased with them. £60 off at the moment is a bonus. It’s is very quiet compared to my general purpose compressor so I am very pleased with my purchase.

Excelente compresor. Bien acabado, sencillo de usar, rápido y compacto. Se puede usar con la batería del coche Carga 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