Pressure testing

Hum

Well it looks the same but it has taken a couple of re-runs to get the whole complex pipework to hold pressure fully. The initial installation changed from 4 to 1 bar in a couple of days, but after some joint re-making and two pipe replacements (the seals are rubber o-rings onto the pipes, so a scratch on the pipe can cause leakage) we seem to be holding >3 bar for 24 hours. The Ice Energy book well describes the test procedures but does not quite give criteria for a 'pass'! Since the final circuit is not significantly pressurised I think we are now OK.

However I fear that we have now lost our builders to another job for a while - I wonder who is paying for the hired machinery?