12hrs later the cylinder gauge had dropped 10 bar.
Assuming that this is definitely not normal so will turn on the cylinder later today and see if I can see any leaks on the reg using Starsan.
Pressure last night:

Pressure this morning:

I got slapped the last time I suggested thatorlando wrote:Try a little soapy water round every connection.
Nifty! Where did you get them from?chris172 wrote:Mine leaked too and couldn't find the culprit so bought non return valves... they stop liquid coming back up the lines too or so it says in the blurb.