Thanks for the advice. Just one other thing: I'm wanting to replace a durgo valve that was put in many years ago, because it sometimes doesn't close properly. I see that they range in price from about £15 to £40. Should I opt for the more expensive one, do you think? Is it a question of 'you...
Thanks for your response, stonemason. You've thrown me a bit though, by talking about bushes. I'm planning on locating the stack and valve indoors as I understand that's where it is intended to go. Do people put them outside then?
Can anyone tell me it it's OK to box in a durgo valve? I know some folks do it but I'm a bit concerned that boxing-in might affect the in-flow of air. Are there any rules about this?
Many thanks