Soil pipe to vent or not to vent. Or to AA, or nothing

[RayPlumb]

Attached is a picture of some new plumbing. Do yoyu have to vent at the top of the 4" pipe or is the stack pipe further along from chamber sufficiant
Thanks
Ray

 

[Mike Jackson]

I'd be inclined to vent to prevent back pressure shortening the life of the macerators. I may be wrong but I thought macerators had to have their own individual connection to a soil stack.

 

[TBServices]

Depending on the length of the run there should also be an AAV on the blue pipe run at the highest point.


Sent from my iPad using Tapatalk HD

 

[RayPlumb]

Macerator instructions says macerator has its own vent and pipe run of 7m heigh and 110m horizontal or a combination of lesser. The pipe run are 2.6meters up from macerator then 8meters accross room at ceiling height, then dropping into soil pipe 2 meters down to chamber.