I need to add soil and waste connections for two new bathrooms. The sketch below shows what I intend to do. Does this look OK?
Note that all the pipework except the red ones, are on the outside wall of the side of my house. The red pipes are my attempt to show the pipe runs that are inside.
All the pipework will be ring seal PVC-U. The soil is all 110mm, all waste is 40mm except the run from the basin which at 4m long I thought would be best if in 50mm - I have also included an AAV for good measure on this run.
All the soil 110 pipes will have 18mm/m fall, could get more if this is better?
All the waste pipes will have 40mm/m fall, could get more or less if this is better.
I have included the short vertical pipe drops (shaded blue) mainly to ensure that the falls on the waste pipes are not too steep but also to ensure that there is separation between waste connections on the stack. That said, none of the connections are at opposite sides of the stack, they are all either on the same side or at 90 degrees from each other so perhaps I don't need any height separation.
I think I may need some access bends on my short vertical pipe drops ?
The distances from the backs of the toilets to the soil pipe connection outside are all pretty short. Toilets 2 and 3 are less than 20cm, toilet 3 is a bit longer at around 1m.
I'm not sure if the conventional open vent just above the roof is the best way to go for venting, was thinking perhaps running with an external rated AAV instead?
Not sure about the exact type of AAV for the basin, any recommendations welcome?
View media item 39924
Note that all the pipework except the red ones, are on the outside wall of the side of my house. The red pipes are my attempt to show the pipe runs that are inside.
All the pipework will be ring seal PVC-U. The soil is all 110mm, all waste is 40mm except the run from the basin which at 4m long I thought would be best if in 50mm - I have also included an AAV for good measure on this run.
All the soil 110 pipes will have 18mm/m fall, could get more if this is better?
All the waste pipes will have 40mm/m fall, could get more or less if this is better.
I have included the short vertical pipe drops (shaded blue) mainly to ensure that the falls on the waste pipes are not too steep but also to ensure that there is separation between waste connections on the stack. That said, none of the connections are at opposite sides of the stack, they are all either on the same side or at 90 degrees from each other so perhaps I don't need any height separation.
I think I may need some access bends on my short vertical pipe drops ?
The distances from the backs of the toilets to the soil pipe connection outside are all pretty short. Toilets 2 and 3 are less than 20cm, toilet 3 is a bit longer at around 1m.
I'm not sure if the conventional open vent just above the roof is the best way to go for venting, was thinking perhaps running with an external rated AAV instead?
Not sure about the exact type of AAV for the basin, any recommendations welcome?
View media item 39924