Hi Everyone
I'm a newbie and have a Familia GT320, trying to change gas bottle but wondered if you need a special spanner to tighten connection? Tightened it with fingers but can hear gas escaping and don't want to overtighten, any suggestions?

You do need a spanner to tighten the nut, however a lot of folks change the standard pigtail for a hand tighten version. (About £20 in caravan shops). Gives you peace of mind.

Thank you, much appreciated