GX-PUMP Professional-Grade High Pressure PCP Air Compressor Filter

I shoot an AirForce Texan .457 LSS and a AirForce Condor 25 cal SS. I was not getting what I needed out of my long tube filter with cotton wads, desiccant, and activated charcoal there was moisture getting through. I purchased a 3.0 L tank to fill my air guns. Again moisture was gettin into tank. I finally purchased a GX water separator and was expecting it to keep the moisture out of my airguns and tank. It really worked. Not only did it work but it worked fantastic. The science behind the water removal is sound and it is a great water removal tool for any Airgun or tank. I work for JPL / NASA and the basic rules of keeping water out of places you do not want it are followed. At first I thought it was a little to expensive but after reading the way it removes water and oil from my guns and tanks was simple and sound so I had to try it. Glad I did. The unit is built solid and tough and the attaching magnets work great holding it vertically so it can do its job without having to find a permanent place on work bench to mount it. There is not much back pressure noted. There is a manual drain at bottom of extractor to dump the water it extracts. I already said this unit is solid but again this unit is built very well, good machining, and great materials shows pride of workmanship. It performs very good with no leaks or other issues. It comes with additional activated charcoal and cotton wads. I suggest using a small inline filter ahead of the GX water extractor to get most of water out before it gets to the GX extractor especially if you live a humid area. It works as advertised. Dr Dave, Payson Utah UPDATE: I have been using the GX Water Filter now for several months. It has worked flawlessly removing water from entering my AirForce Condor SS and Texan .457 LSS and Feinwerkbau Olympic Pistol. The filter has not been changed yet as most of the water gets vented periodically by opening water valve vent. Any water moisture gets picked up by the filter. I really like the filter keeping moisture out of my 3.0L and 6.8L air tanks and airgun tanks and internals to prolong life of my airguns. In my opinion, it is one of the best filters out there. Filters are not that costly as you get a lot of mileage on them and very comfortable to know moisture is not getting into my tanks and airguns. Update: Really have used this colescent filter a lot lately, and by far it is the BEST designed pcp filter out there that really works and keeps moisture out of the Airguns. And keeps expensive pcp airguns from being damaged. I do not live in a humid area but we get humid days occasionally and I have several pcp rifles and competition pistols and happy knowing my airguns are getting fresh DRY AIR to their tanks. BEST FILTER available and the cost is very reasonable that will keep your pneumatic pcp airguns from serious corrosion or corrodedparts

Purchased this filter for my GX-E-CS4-I Portable PCP Air Compressor to deliver clean dry air to my equipment. -Build quality is top notch. -Comes complete with extra filter elements, tools, magnets and a high quality hose and coupler. -The unit was easy to assemble, and attach to the side of my compressor. -Performed as expected and provides the peace of mind for quality dry filtered air.

The first thing that impressed me wasn't the filter itself—it was the packaging. It arrived securely packed in custom-cut foam, which immediately gave me confidence that some care had gone into the product. Once I picked it up, I was even more impressed. This thing is built like a tank. There's a lot of metal here, giving it a reassuring weight, and the machining, threading, and overall fit and finish are excellent. What I liked: * excellent machining and construction * heavy-duty all-metal design * quality packaging * effective moisture removal * convenient water drain * a significant upgrade over standard compressor filters I've been using it with a small PCP compressor to fill a 6.8L carbon fiber bottle. Filling a tank that size takes a long time with hobby-grade equipment, which actually made this a good test of the filter. At every cooling break, I'd drain the separator and was surprised by how much water it had collected. Seeing that amount of moisture removed from the air gave me a lot more confidence than relying on the simple inline "filters" that typically come with these compressors. I also prefer this style of filtration over units that rely only on charcoal and desiccant. Being able to physically remove condensed water during the fill just makes sense, especially when you're compressing air for extended periods. One feature I found interesting is the pre-pressurization design. I can't say whether it measurably improves filtration, but it's neat to watch the compressor gauge pause around 2,000 PSI before the air begins pressurizing the line to the tank. Whether that's simply part of the design or actually contributes to better performance, it certainly appears to be functioning as intended. The only question mark I have at this point is long-term serviceability. I haven't been able to find consistent information on whether the filter cartridges are intended to be rebuilt with new media or replaced as complete assemblies. Since the original filter is still performing well, I'm not about to sacrifice one just to satisfy my curiosity. Overall, this has been an excellent addition to my PCP filling setup. The build quality is outstanding, the moisture separation appears to work very well, and it inspires far more confidence than the basic filtration included with most small compressors. If you're serious about keeping moisture out of your airguns or storage tanks, I think this is money well spent.

Well made filter. Does the job where it was made for. Exellent!

The filter seems to be well built and high quality. It doesn't actually start putting air into the tank until the internal pressure reaches like 175bar then is goes down to 120 and remains there until you're done filling up whatever thank you're using. I'm using it to fill up 1L and 4L mini scuba tanks for shallow dives. Been using it inside my room in FL so as to not have to fight so much moisture

This filter is quite different from all the others I've seen at this price point.My setup runs as follows:GX-PUMP CS4-I pump (higher power than most compressors - so don't buy cheap 300 bar stuff. It puts out 5800 PSI / 400 BAR / 40 MPa) - and this thing can run constantly for 5 hours!!! GX-PUMP PCP Compressor FilterHill Compressor Dry-Pac Pro - Air Dryer Filter (4500-001)3L tanks or straight to the gun.Your goal here is to get dry, clean compressed air. Moisture and oil will destroy your guns. GX claims you can use this filter for diving—and some people do—but they don't provide certifications, plus there is no carbon monoxide filter in the chain, so let's take that as an "interesting" claim and stick to airguns.How the System Works:When you start the compressor, it builds up pressure in the line between the pump and the GX filter. The CS4-I has a basic moisture trap built-in, which is a good start. Then the GX-PUMP filter does its thing.This is the most important part to understand, and I envision it as a three-stage process. The GX filter features a built-in Pressure Maintaining Valve (PMV). This valve won't open to let air pass through to your guns/tanks until the line pressure hits roughly 1,800–2,000 PSI. Because the air enters and forces the pressure to build rapidly inside the filter chamber, the condensation not cleared by the CS4-I's built-in trap drops straight to the bottom of the cylinder.Once that high threshold pressure is achieved, the valve opens, and the air streams through the GX-PUMP’s own proprietary filter material. This media uses a dual-layer mix of molecular sieve and activated carbon to strip out the bulk of the remaining moisture and aerosolized compressor oil.From there, the air flows into the Hill filter, which utilizes its own specialized, multi-stage desiccant media to catch any micro-moisture that somehow sneaked past the first two traps.Why Running Both in Series is a Game Changer:Running the GX-PUMP filter and the Hill Dry-Pac Pro in series might look like overkill, but here is the technical reality of why it works so well:Progressive Moisture Dropping: Air drying is all about stages. Your CS4-I drops the heavy, liquid condensation. The GX-PUMP filter uses high pressure to squeeze out the secondary moisture and uses its internal volume to absorb the brunt of the oil vapor. By the time the air reaches the Hill filter, it is already "clean," meaning the expensive Hill media isn't getting choked with raw oil. It can do its actual job: polishing the air to absolute desert-dryness.Media Longevity: If you ran the Hill filter alone with a high-output pump like the CS4-I, you would saturate the desiccant media in no time. By using the GX filter as a sacrificial first line of defense, you exponentially extend the life of your pricey Hill refills.The Verdict:Ultimately, this setup gives you a redundant, multi-layered insurance policy for your rifles. You are using mechanical separation, molecular filtration, and final desiccant polishing in one continuous chain.Is the GX-PUMP filter a certified diving setup? Absolutely not—don't risk your lungs. But for filling a 3L tank or going straight to a high-end PCP gun where a single drop of moisture means internal corrosion and ruined regulators? This filter is the missing link that makes a high-power DIY filling station actually safe for your gear. Highly recommended if you are serious about air quality.

Works great but very slow bleeding pressure off

WOW! Clean air Well designed Goes anywhere Fits any compressor tanks after a couple/few months are still dry as a bone. I love the thought that went into them including extra check valve to protect the compressor. Fits large and small compressors. Thanks for the ideas Mark Bobolz

Excelente filtro, atrapa la humedad de manera muy efectiva.

Appairage parfait avec compresseur gx cs4-i , ultra efficace, aucune humidité ressentie dans l'air en sortie

So far working as advertised. Excellent device.

Ich habe gerade einen zweiten Luftkompressor für meine PCPs bekommen. Er ist wassergekühlt und viel besser und schneller als mein erster luftgekühlter Kompressor. Ich habe nach einem neuen Filter dafür gesucht, um sicherzustellen, dass die Luft trocken und ölfrei ist. Ich habe dieses Modell von GX PUMP bei Amazon mit anderen günstigeren Modellen aus Fernost verglichen. Dieses Modell schneidet in allen Kategorien besser ab und der Preis ist sehr ähnlich zu den anderen chinesischen Modellen von eher fragwürdiger Qualität. Highlights: + Erstaunliche Qualität und wunderschön verarbeitet! + Sehr solide Konstruktion + Tolle Funktionen wie die magnetische Befestigung am Kompressor + Ein Ersatzsatz Filtermedien ist im Lieferumfang enthalten Was mich wirklich von diesem Filtermodell überzeugt hat (es handelt sich eigentlich um einen Koaleszenz-Wasser- und Ölabscheider und einen Filter in einem Gerät), war ein YouTube-Video des Produktdesigners, in dem er die Funktionsweise erklärte (er schickte seinen Entwurf an GX, die das Gerät herstellen). Die Tatsache, dass sich der Wasserabscheider erst bei 2000 psi öffnet, bedeutet, dass Wasserdampf buchstäblich keine Möglichkeit hat, durch den Filter zu gelangen. (Da Wasserdampf bei diesem Druck nicht existieren kann.) Ich habe dieses Modell mit dem günstigeren chinesischen Modell verglichen, das ich an meinem ersten Kompressor habe, und es gibt wirklich keinen Vergleich – dieses Produkt ist in jeder Hinsicht weit überlegen. Ich werde es nun für alle zukünftigen Füllungen verwenden, und es wird auch dazu beitragen, jegliche Feuchtigkeit zu entfernen, die bisher in meine PCPs gelangt sein könnte. Ich kann diesen Filter von GX nur wärmstens empfehlen und würde ihm mehr Sterne geben, wenn ich könnte. 100 % Empfehlung.

Excellente filtre perfect