Another Basement Plumbing Q
I have a home with a walkout basement and a septic system. All the drains in the basement are gravity fed. The basement was plumbed for a bathroom with two 2" drains and a 4" drain. What information do you need from me to explain how to vent this setup? I believe that the drain that is setup for a shower is going to be used by two sinks and the drain setup for the sink isn't going to get used at all... it's only going to be a half bath. Now supposedly according to what I've read here the shower drain should have a P trap underneath the concrete but when I pour water into either of the 2" drains, the water all just drains away and I never see any standing water in the pipe. So I guess I have two questions here, How do I vent this bath and whats up with the shower drain not having a P trap?
The basement toilet flows out to the septic tank and I believe the rest of my houses two main 4" drains coming from each side of the house tie into this one.
Thanks,
Brad