Installing PVC for Vent and Waste

[jeffrey262]

I am building out my basement. I am installing a full bathroom. The rough plumbing was completed when the house was built. Now I am ready to tackle the job of building a full size bathroom. Ejector Pump already completed.

There are 3 PVC pipes coming up from the ground. One waste and 2 Vent. I assume One is for the shower while the other one is for the sink.

With all the studs in place and the 2 vent pipes protruding up through the sole plate (about 4 feet), what do I do?

I have not run the copper yet? What size pvc piping can I run for the sink waste -- 1 1/2". Do I have to drill 2" holes through each 2x4 to get to the ejector pumb or do I tie into the shower pea trap? How do I tie the vent pipe in to the sink? Does the waste pipe tie into the vent pipe then into the pea trap?

Any advice would be helpful.
Thank you,
--jeff

[chandler]

Jeff: first, look up. Is there a pipe protruding from the floor above the piping in the floor? Some contractors take into consideration the future finishing of the basement bath and install the vent during rough in. It will be capped. It will also be full of water. If you are lucky enough to have this, then your venting is simple. 1 1/2" pvc for the sink drain, and yep 2" holes would help installation.
Let us know about the vent pipe.

[jeffrey262]

Yes there is. It looks like it is coming from one of the other bathrooms. Do I run both vents from the basement floor into the above floor? But how do I tie the vent into the sink? Do I tie the sink waste into the same vent that is going back upstairs?