My GFs family wanted me to do some plumbing for a sump pump system and also run a drain for a washer. Both are in the basement. No big deal there.
There is one main 3" drain stack in the basement which disappears into the ground. There is 1 2" trunk that is only about 8" then reduces to 1.5" piping so the majority of this trunk is 1.5". There are 3 1.5" brances coming off this one trunk that is also 1.5". I find this very bad and im about to replace the truck and make it a full 2" with 1.5" branches. Their sump pump was originally plumbed into this truck so thats where I left it. I find that when the pump kicks on, it seems to create a vacuum and sucks the water out of the sink trap and you then hear a bunch of gurgling noises.
Now, my question is this. According to the math it seems I should only have 2 1.5" pipes on a 2" pipe correct? So I was thinking of making TWO 2 inch trunks of the main stack and have 2 1.5" branches off each trunk. Should I do it this way or should I have all 4 go into the 2"?
The 1.5" drains are, bathroom shower and sink(one pipe), kitchen sink, sump pump and washer drain.
Typing this out I think I just answered my own question.
My next question is this. I don't know who did the plumbing before but its really messed up. There is also no vent in the plumbing system anywhere. How important is a vent?
There is one main 3" drain stack in the basement which disappears into the ground. There is 1 2" trunk that is only about 8" then reduces to 1.5" piping so the majority of this trunk is 1.5". There are 3 1.5" brances coming off this one trunk that is also 1.5". I find this very bad and im about to replace the truck and make it a full 2" with 1.5" branches. Their sump pump was originally plumbed into this truck so thats where I left it. I find that when the pump kicks on, it seems to create a vacuum and sucks the water out of the sink trap and you then hear a bunch of gurgling noises.
Now, my question is this. According to the math it seems I should only have 2 1.5" pipes on a 2" pipe correct? So I was thinking of making TWO 2 inch trunks of the main stack and have 2 1.5" branches off each trunk. Should I do it this way or should I have all 4 go into the 2"?
The 1.5" drains are, bathroom shower and sink(one pipe), kitchen sink, sump pump and washer drain.
Typing this out I think I just answered my own question.
My next question is this. I don't know who did the plumbing before but its really messed up. There is also no vent in the plumbing system anywhere. How important is a vent?