I think it is unvented, yes - they have given me a quote to to the following work 're-pipe airing cupboard to include and auto air vent and to replace teh 2 port valve for a spring return type'. They had a devil of a job refilling the system with water after it had be drained due to the fact that it's unvented.
As for pressure testing the system - they have gone up to 2.5 - 3 bar testing with water, but I was told that they only went to 1 bar when pressure testing with gas.
I have taken some photos of the airing cupboard upstairs with the 3 tanks if that's any use! Thank you all so much for taking time to talk about this - I am really grateful.
As for pressure testing the system - they have gone up to 2.5 - 3 bar testing with water, but I was told that they only went to 1 bar when pressure testing with gas.
I have taken some photos of the airing cupboard upstairs with the 3 tanks if that's any use! Thank you all so much for taking time to talk about this - I am really grateful.