OldHousePlumbing
New Member
Hi, I am gutting and re-doing a 2nd floor TINY bath in a very old house. I have mapped out the Drain/vent system for the 3 fixtures (shower, toilet, sink) all dumping into the common 6" cast iron waste stack.
Here is the proposed sketch:
https://www.dropbox.com/s/alc8312138fcg6d/IMG_1111.JPG?dl=0
Previously, the entire bathroom was wet-vented using only the waste stack. My concern is that the way it was plumbed, the WC was NOT the last fixture entering the stream. I can not change that, but my questions are:
-will the addition of the sink dry vent be enough to prevent syphoning of the p-traps by a toilet flush in the sink and shower? (see sketch)
-If so, will the wet vent section of 2" be sufficient for the shower? This is a TINY bathroom and any size savings on pipes is a plus!
-If you see any glaring problems with my plan, please let me know.
JS
Here is the proposed sketch:
https://www.dropbox.com/s/alc8312138fcg6d/IMG_1111.JPG?dl=0
Previously, the entire bathroom was wet-vented using only the waste stack. My concern is that the way it was plumbed, the WC was NOT the last fixture entering the stream. I can not change that, but my questions are:
-will the addition of the sink dry vent be enough to prevent syphoning of the p-traps by a toilet flush in the sink and shower? (see sketch)
-If so, will the wet vent section of 2" be sufficient for the shower? This is a TINY bathroom and any size savings on pipes is a plus!
-If you see any glaring problems with my plan, please let me know.
JS
