fill air tanks

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   The Gun City pump (GX CS2) is OK, but air cooled and heats up quick. Heat kills those wee pumps.
Be prepared to pump for maybe 10 minutes, and allow to cool. Pump for another 10 minutes. Can get tedious.
The next step up is the CS3 which has a fully enclosed case but the same guts as the CS2...so not much better at all.
Better of the lot is the CS4. It's water cooled (has a built in radiator). I sold mine recently for $1000 to give you an example. They are rated to 5½ hours continuous running.
I sold mine to get the Hill Evo-310, and pleased that I did. Only use it for gun filling, and it will outlast me I reckon.
For the GX CS2/3/4 etc you get a better price by buying direct from Alibaba (not Aliexpress). The Aliexpress sellers are sometimes selling a clone...and they have no shame.
For the money that GC want I'd be looking at a genuine Yong Heng (water cooled). Needs a bucket of water to pump from for cooling. Needs regular maintenance (yearly probably)...seals, grease, etc.
Yeah, sod the scuba tank filling guys. Damn dear per fill, plus the yearly test, and the 5 year test, etc.

Edited by Grey Kiwi - 2 hours 54 minutes ago at 12:06pm

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Grey Kiwi Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 09 Jan 2022 Location: Richmond Status: Offline Posts: 50	Post Options Post Reply Quote Grey Kiwi Report Post Thanks(0) Quote Reply Topic: fill air tanks Posted: 3 hours 12 minutes ago at 11:48am
	The Gun City pump (GX CS2) is OK, but air cooled and heats up quick. Heat kills those wee pumps. Be prepared to pump for maybe 10 minutes, and allow to cool. Pump for another 10 minutes. Can get tedious. The next step up is the CS3 which has a fully enclosed case but the same guts as the CS2...so not much better at all. Better of the lot is the CS4. It's water cooled (has a built in radiator). I sold mine recently for $1000 to give you an example. They are rated to 5½ hours continuous running. I sold mine to get the Hill Evo-310, and pleased that I did. Only use it for gun filling, and it will outlast me I reckon. For the GX CS2/3/4 etc you get a better price by buying direct from Alibaba (not Aliexpress). The Aliexpress sellers are sometimes selling a clone...and they have no shame. For the money that GC want I'd be looking at a genuine Yong Heng (water cooled). Needs a bucket of water to pump from for cooling. Needs regular maintenance (yearly probably)...seals, grease, etc. Yeah, sod the scuba tank filling guys. Damn dear per fill, plus the yearly test, and the 5 year test, etc. Edited by Grey Kiwi - 2 hours 54 minutes ago at 12:06pm

J-S Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Senior Member Joined: 20 Oct 2014 Location: Auckland Status: Offline Posts: 464	Post Options Post Reply Quote J-S Report Post Thanks(0) Quote Reply Posted: 3 hours 58 minutes ago at 11:02am
	PPCP
	J S Airguns Air Arms TX200('s) Theoben Sirocco HW77 FWB 300s Webley Patriot One or two others... Current projects: Too many..

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1587	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 15 Aug 2025 at 11:11pm
	Gday metallicsting, I would suggest you look at a compressor. A decent one will completely fill your gun each time, where a dive tank will loose headpressure after each fill and then of course need a trip to the dive shop to get filled. Then there is the testing fo rthe tank that will happen every year that costs around $70 -$90. Some people think you don't need a test if it's not for breathing use, but it does need to be in test to be legally filled. Get a compressor that works on 12 v and it means you can fill it in the field off your car battery. I have a GX CS4. Paid around $900 landed, but I see Hunting and Fishing might be selling them under Gamo label with their new PPCP (plastic precharged Pneumatic) I also have an earlier Airbow compressor as a backup, and haven't used my dive tank for a few years now.

metallicsting Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 15 Aug 2025 Location: Wellington Status: Offline Posts: 1	Post Options Post Reply Quote metallicsting Report Post Thanks(0) Quote Reply Posted: 15 Aug 2025 at 10:17pm
	How did you get on with getting a tank? I see gun city now sell them for an extortionate $1,199 , and they also sell an air compressor for $799. What did you end up doing? I'm interested in purchasing an FX Impact M4 and am looking at the filling situation also. Most annoying thing is most dive shops don't put how many bar the tank has.

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1587	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 16 Nov 2019 at 5:06am
	Good point Mike, If the gun is regulated at say 120 bar, filling to 250 bar will only give you more shots, otherwise no advantage apart from a greater safety margin in the tank pressure. You would only know the difference if you filled it to max, and shot a string, then filled it to dive tank limit and compared shot count.

dvlnme Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 31 May 2017 Location: taranaki Status: Offline Posts: 519	Post Options Post Reply Quote dvlnme Report Post Thanks(0) Quote Reply Posted: 16 Nov 2019 at 4:45am
	you right there paul,using 250 bar tank to fill 250 bar rifle does mean only getting few fills at full 250 bar etc,personally cant see point in 250 bar guns unless you have capablity to constantly fill them to 250 bar,and that means having your own compressor or pump you guts out with hand pump and am getting too old for that sh*t eh!!if rifle is regulated it will run perfectly fine at lower fill pressures the shot count will just be lower,but will still be a decent shot count,very likely higher than many other rifles,it just comes down to bassically how many shots will suit you i guess,i perfectly happy with 25/30 shots per fill,as thats 3 mags worth for my rifles,plenty for a day or nights hunting,i dont know what you shot count is from full 250 bar fill but imagine its significantly more the 30 shots,there fore using a lower fill pressure should still give you more than the 30 shots i am used to.evan if you do get your bulk bottle filled you will only get a very few fills at the full 250 bar anyway,possibly only one or two fills at 250 bar,it is what it is eh!!just find a comprimise and enjoy your rifle mate. cheers mike

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1587	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 15 Nov 2019 at 12:54pm
	The other option is to fill up with your dive tank, and top off with a hand pump. Samba, I know we have talked already, but I believe the dive shop in Island Bay might do those generouus fills. But of course you're always going down hill pressure wise.

nunga Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Admin Joined: 09 Mar 2013 Location: Pukekohe Status: Offline Posts: 1050	Post Options Post Reply Quote nunga Report Post Thanks(0) Quote Reply Posted: 14 Nov 2019 at 4:41am
	Yeah the only time you really need that higher PSI is for the big bore stuff
	2nd place HP springer - WFTF World Championships 2014

dvlnme Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 31 May 2017 Location: taranaki Status: Offline Posts: 519	Post Options Post Reply Quote dvlnme Report Post Thanks(0) Quote Reply Posted: 14 Nov 2019 at 3:58am
	250 bar tanks going be prob for some time as is testing of them to get filled etc,dont believe this will change much unlees commercal divers start using 250 bar tanks,as the demand for dive shops to upgrade their systems for 250 bar isnt currently there,local dive shop in new plymouth bit closer than alex and owner does fill 250 bar tanks,tho not sure if he can test them as well,he does test metal bottles up to 220bar tho,prob being that all pcp rifles now require a firearms licence this has significantly affected sales of pcp rifles as well as use of them,so less are now sold etc,this in turn has proberly had an effect on clubs prepared to spend the significant outlay in buying compressors for club members as well,fact is there are not as many 250 bar pcp rifles out there as the lower fill pressure rifles using lower fill pressure hpa bottles etc,its just a question of numbers as far as dive shops and club fill stations go,personally cant see the point in having a 250 bar gun if cant fill it eh!!as 250 bar guns are really mostly bout getting higher shot counts not bout getting more power,as said previously a regulated gun will work just fine at 200/220 bar,but just give less shots per fill,yet still give a very decent shot count,so its not actually that necessary to actually fill to 250 bar on many rifles for them to still very practical rifles,they just need to be filled more often than at 250 bar. there must be some one in your area who can fill your hpa bottles,just be matter of finding them. dont want seen negitive on this one but just trying be practical as i cant see things changing ant time soon with 250 bar fill pressures,the other choice is to buy your own small compressor on line,they can be got for approx $500 but can be lets say problomatic,a local club member has one and its given no probs for several years no,but does require freqent maintanace.i guess at this price you definatly get what you pay for,but if looked after an maintained not abused will work for years,it will depend for sure how much use it get i guess,the other option is to visit placemakers a see if you can buy one new hpa nail gun compressors they sell,i believe they do sell these compressors separatly from the nail gun,at approx $ 900 i heard. cheers mike

nunga Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Admin Joined: 09 Mar 2013 Location: Pukekohe Status: Offline Posts: 1050	Post Options Post Reply Quote nunga Report Post Thanks(0) Quote Reply Posted: 13 Nov 2019 at 4:11pm
	Im pretty sure Alex can full up to 250 bar but he is no where near you
	2nd place HP springer - WFTF World Championships 2014