Hi everyone - I'm redoing my bathroom and I'd be very grateful if you could let me know if I'm on the right track with the waste pipes. It was very manky before so I removed all the units and I've got the floor up now so this is a perfect chance to make sure it all works well.
Originally there were two basins and a shower feeding into one 40mm pipe (no drop!) which runs into the soil stack. I've plumbed out one basin and I want to add a bath. It's not feasible to give the outlet from the bath its own run -- it will have to join the same waste pipe as the shower and remaining basin.
From reading lots of threads here it seems like I'll need an anti-vac trap under the basin, and maybe an air valve by the shower trap (i can run a pipe from there up behind the false wall if necessary, as i understand it needs to be accessible and a certain height). A quick sketch of the plan is below. Does this look about right? Is there anything else I need to bear in mind to avoid smells / slow draining / water coming up through the drains?
---- thanks in advance for any help, this forum is a lifesaver.
Originally there were two basins and a shower feeding into one 40mm pipe (no drop!) which runs into the soil stack. I've plumbed out one basin and I want to add a bath. It's not feasible to give the outlet from the bath its own run -- it will have to join the same waste pipe as the shower and remaining basin.
From reading lots of threads here it seems like I'll need an anti-vac trap under the basin, and maybe an air valve by the shower trap (i can run a pipe from there up behind the false wall if necessary, as i understand it needs to be accessible and a certain height). A quick sketch of the plan is below. Does this look about right? Is there anything else I need to bear in mind to avoid smells / slow draining / water coming up through the drains?
---- thanks in advance for any help, this forum is a lifesaver.