jfb Posted March 5, 2020 Share Posted March 5, 2020 I have a small shower room in a small outbuilding/office with waste plumbing as in the drawing. It goes to a sewage treatment plant and this is vented at the end of the run through the roof of a barn conversion about 25m upstream of the shower room/office. In the interest of the toilet not sucking water out of basin/shower traps is my best option: 1. fit anti syphon traps to both shower and basin 2. fit an AAV - if so where should it go? can it go where I indicate on the drawing or should it be closer to the toilet (upstream of the shower and basin) 3. Fit all the above. 4. Don't bother with any of them - it will all be fine! Link to comment Share on other sites More sharing options...
Gone West Posted March 5, 2020 Share Posted March 5, 2020 2 hours ago, jfb said: 2. fit an AAV - if so where should it go? can it go where I indicate on the drawing or should it be closer to the toilet (upstream of the shower and basin) I would fit one where you have indicated. Link to comment Share on other sites More sharing options...
ProDave Posted March 5, 2020 Share Posted March 5, 2020 I would extend the pipe up above the WC and fit the AAV there. There is a risk of sucking the water out of the basin trap when you flush the WC. 3 Link to comment Share on other sites More sharing options...
jfb Posted March 6, 2020 Author Share Posted March 6, 2020 16 hours ago, ProDave said: I would extend the pipe up above the WC and fit the AAV there. There is a risk of sucking the water out of the basin trap when you flush the WC. Could I just go for a basin trap with built in AAV as I will have some issues getting an AAV behind the toilet? I think I hadn't quite clicked that an anti syphon trap is essentially an AAV. Link to comment Share on other sites More sharing options...
Russell griffiths Posted March 6, 2020 Share Posted March 6, 2020 Does that toilet not go out through the wall?? if it does how about a small stack outside. Link to comment Share on other sites More sharing options...
Mike Posted March 6, 2020 Share Posted March 6, 2020 Building Regs Part H would be a good place to start. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now