I’m working on a brick home built in the 1950’s. The walls are plaster on cinder block with brick on the outside. The kitchen cabinets are going to be replaced soon and I would like to take the opportunity to update the drain plumbing. Currently the home has 1″ galvanized plumbing in the kitchen. I have already replaced all but the kitchen drain section with ABS.
From the trap the galvanized piping runs at an angle to a void in the wall where it T’s up to the roof vent and down for the drain. Near the bottom of the wall the cabinet is cut out to allow the drain line to go around the foundation and into the basement.
I have come up with three options to update the plumbing.
1. Replace the drain and vent lines with 1.5″ ABS exactly as they are installed now.
2. Cap off the T and run a new drain line straight down under the sink through the floor. Under the floor tie in the new drain and use the old line for a vent. (This may be considered a broken vent).
3. Run a new drain line through the floor up to a sanitary T. Run a new vent line from the top of the T over to the existing void in the wall.
I want to make sure the drain is as efficient as possible and doesn’t make the cabinet installation too difficult. Due to the type of construction it’s not possible to hide the drain line in the wall.
Your opinions are appreciated!
Replies
if it were me i would run a new 2 inch drain with a clean out and install a in line vent . elimenate existing vent and re roof or cap vent on roof so no rain will get in
Do you mean one of those one way valve type vents? I've heard different names for them, AAV and Sturder Vent come to mind.
yes that is what i mean