joesloppy
New Member
I am adding a bathroom in my basement complete with toilet, tub,
shower, and sink. I believe I have the drainage system down but I
don't quite have the venting figured out. I bought a book with about
10 full color pages on how to vent plumbing properly but I still am
having trouble figuring out what I need to do exactly. If you open the
pdf or jpeg at http://www.kcengineer.com/piping.jpg or
http://www.kcengineer.com/piping.pdf you will see my current layout. I
have added letters to the pipes to aid in telling me where to come off
for vents. If I understand correctly, I would only need to add a vent
to the pipe labeled C which is between the shower trap and wye for the
tub. Doing that I assume would allow the shower, tub, and toilet to
pull air from that vent and not suck water out of a traps. The sink
will have a mechanical vent you can buy for about $5, so this I assume would take care of both sides of the 4x4x2 double wye. Then again, maybe
I don't need any vents as I did run 4 inch all the way to the toilet
and 2 inch all the way to each fixture so the pipe may just vent itself
because the top half would never be full. I am confused as what to do;
this is my only option for layout of piping because of space
restriction. By the way, the longest pipe is D, about 7' long. The
rest are all 3' or less sections. Thanks for any advice! Oh, by the way, I looked at the toilet, tub and sink drain lines on the first floor to see how it was vented but I didn't notice any vents, probably because all run directly to the vertical stack by themselves and are vented by the stack which runs to the roof.
shower, and sink. I believe I have the drainage system down but I
don't quite have the venting figured out. I bought a book with about
10 full color pages on how to vent plumbing properly but I still am
having trouble figuring out what I need to do exactly. If you open the
pdf or jpeg at http://www.kcengineer.com/piping.jpg or
http://www.kcengineer.com/piping.pdf you will see my current layout. I
have added letters to the pipes to aid in telling me where to come off
for vents. If I understand correctly, I would only need to add a vent
to the pipe labeled C which is between the shower trap and wye for the
tub. Doing that I assume would allow the shower, tub, and toilet to
pull air from that vent and not suck water out of a traps. The sink
will have a mechanical vent you can buy for about $5, so this I assume would take care of both sides of the 4x4x2 double wye. Then again, maybe
I don't need any vents as I did run 4 inch all the way to the toilet
and 2 inch all the way to each fixture so the pipe may just vent itself
because the top half would never be full. I am confused as what to do;
this is my only option for layout of piping because of space
restriction. By the way, the longest pipe is D, about 7' long. The
rest are all 3' or less sections. Thanks for any advice! Oh, by the way, I looked at the toilet, tub and sink drain lines on the first floor to see how it was vented but I didn't notice any vents, probably because all run directly to the vertical stack by themselves and are vented by the stack which runs to the roof.