New bottle gauge
New bottle gauge
I have acquired a 4ltr dumpy MDS bottle from a friend who has given up shooting, unfortunately (and I don't know why) it hasn't got a gauge on it. It is a 300bar in test til 2021 in almost new condition. So I need a gauge, 2 questions, there appears to be 2 sizes, I'm thinking its a rear fitting 1/8 thread. Anyone know if this is correct, and after phoning MDS (talking to a salesman, not a tech) he was unable to answer my question satifactually. He also said fitting of a new gauge (by me) could incur injury, death or worse. It looks like a straightforward parallel thread, how hard can fitting be ?. Anyone who's fitting one before, a few pointers would be great. Thanks.
Air Arms S510 30th Anniversary .177
Air Arms S410 Carbine .177
Air Arms S410 Carbine .177
- TenMetrePeter
- Posts: 1043
- Joined: Wed Jun 29, 2016 5:40 pm
- Location: Luton Beds UK
Re: New bottle gauge
If fitted with an airgun fill valve they are usually rear mount 1/8 bsp taper with ptfe tape. If there's a machined face to screw it up to then parallel with a dowty washer may be needed.
Best fittings do them for about £25.
Post a photo in imgur or flickr and post it here if not sure.
Best fittings do them for about £25.
Post a photo in imgur or flickr and post it here if not sure.
- TenMetrePeter
- Posts: 1043
- Joined: Wed Jun 29, 2016 5:40 pm
- Location: Luton Beds UK
Re: New bottle gauge

If it looks like this it should be a taper thread so you finish up with it the right way up.
Re: New bottle gauge
Thanks for your help, it is exactly like the one in the pic you've posted.
Air Arms S510 30th Anniversary .177
Air Arms S410 Carbine .177
Air Arms S410 Carbine .177
- TenMetrePeter
- Posts: 1043
- Joined: Wed Jun 29, 2016 5:40 pm
- Location: Luton Beds UK
Re: New bottle gauge
Right. 1/8 taper and use ptfe tape and a SPANNER. Dont wind it in with the gauge body. They are delicate. Mine was flattened by the scuba shop as they (presumably) chucked em in the van. Divers tanks don't have delicate bits on like ours. Didnt notice til I got home!
- Blackbaronfish
- Posts: 3691
- Joined: Sun Feb 15, 2015 6:20 pm
- Location: Nuneaton
Re: New bottle gauge
wind the tape on clock wise whist the thread is facing you. This helps to stop it unavailing as you screw on.
BBF
BBF
Did I mention that I'm the only one to have attended EVERY meet since we started
Re: New bottle gauge
Thanks everyone for your advise, much appreciated.
Air Arms S510 30th Anniversary .177
Air Arms S410 Carbine .177
Air Arms S410 Carbine .177
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