Bathroom Vent Help...

[Anonymous]

I had a house built and the builder left an upstairs area unfinished so I could finish it later when I had the money. Now that I have the money I have a question.

There are water pipes and drain pipes already roughed in. (copper water pipes coming up through the floor for the sink, shower and toilet) and PVC pipes for drains for the sink, toilet (which is capped) and the shower.

My question is this. Do I need a to install a vent for the drains in this bathroom, and if so can I just install it in the drain for the sink which would make the job a snap as I could install a vent after the trap and go right up through the roof. The sink, shower and toilet drains are all within 6 feet of each other. And even though the pipe is now below the floor, I believe all drains connect to the large PVC drain for the toilet.

Thanks
Joe

[Wgoodrich]

With everything being within 6' then you could install a vent pipe in a tee in the wall behind the sink. When you vanity drain comes up in the wall just install tee one pipe going to the vanity drain then come out the top of that tee with a vent pipe going into your attic. If you existing vent going through your roof is nearby you may tap to that existing vent. If you have to go through the roof with a new vent then adapt to a 3" pipe going through the roof for freezing protection required where the vent enters to outside elements if you are in an area that freezes in the winter.

The above venting may serve the entire branch including your shower and toilet because you are only 6 feet apart. The drain pipe of the shower would be a wet vent pipe between the soil pipe and the tee used as both a drain and as a vent called a wet vent.

Hope this helps

wg