Leaderboard

That would work. As long as air can get to the vertically falling slug of water then vacuum deficit would be taken care of. No probs with that arrangement, as long as the branch is a Y with a 45 in it to rectify back to 90o. Essentially your then sending the 'products of nourishment' from pan 2 towards the corner branch, rather than stalling at a regular branch and then relying on the fall ( from the vent ) to direct the flow.

A bit of modification to bring the conduit forward!

Tooling ... basically to injection mould that you need one of the branches to be smooth as you need to eject the moulding hence the design.

Fack knows Check out this bad boy. Come out of this with two M&F bends to rectify back to horizontal and then you'll have no issues with what Joe mentioned ( which is with merit I assure you ).

You mean a corner branch ? http://m.ebay.co.uk/itm/111911500778?_mwBanner=1

Also remember to switch off your MVHR if doing dust generating work post move-in. We've been reinforcing the stairwell and have been cutting out the old PB and vacuum sanding back the new work. Also, if you have ground level intake / extract vents (like us) its a good idea to switch off if doing dusty external work, like cutting slabs etc.

A lot of the new builds I see, I see money being "wasted" by inefficient layouts and a lot of wasted corridor space or over larger entrance halls etc. That was a "failing" in our current house. I always said the large entrance hall and galleried staircase was a waste of space. I was told it gives the house a "wow factor" Shame none of the few people that have viewed the house have been wowed by it. The new one is a lot more eficcient on floor space with the hall and landing being much more modest, and my rather quirky combining of the utility room with the downstairs toilet. Having just built a house with a vaulted warm roof and now see how something as simple as moving the insulation from the upstairs ceiling, to the roof line can so dramatically improve a building, I would not advocate deliberately making "cold" parts of the house. I am actually staggered how little I have spent on insulation for my whole house, so the savings would be quite small to make one bit a less well insulated space.

Terry It's not necessarily the case that all mvhr pipework is "within the warm environment" I have recently wired a new house, where the mvhr unit, and a lot of the distribution. pipework is up in the cold, ventilated loft space. Without lagging that would be a condensation nightmare (it might still be so) If I could give just ONE recommendation on modern house design, it would be DO NOT have an old fashioned, ventilated cold roof space where you rely on insulation at ceiling level. Even if you are not doing "room in roof" it is SO much better to have a warm roof design where the insulation is at eaves level. SO much easier to detail to get an air tight house etc etc. This new house I just wired, the builder was so smug about how well insulated and sealed (he thought) the house is, but i still noticed if you remove a light switch on a windy day, you could feel the cold air coming out of the hole, no doubt leaking somehow from that cold loft space into the service void behind the plasterboard.