Hi and thanks for providing such a helpful forum.
I'm working on a vented CH system (S plan). I've read on a couple of sites that the vent pipe should be a size up from the feed pipe. I'm sinking both the vent pipe and feed into a stone wall and would really like to use 15mm for both if possible.
Would using 15mm for both cause a problem or is it important to use 22mm for the vent (and if so, why)?
cheers,
I'm working on a vented CH system (S plan). I've read on a couple of sites that the vent pipe should be a size up from the feed pipe. I'm sinking both the vent pipe and feed into a stone wall and would really like to use 15mm for both if possible.
Would using 15mm for both cause a problem or is it important to use 22mm for the vent (and if so, why)?
cheers,