I would like to add a sink in the finished part of my basement. The picture below is of the unfinished side which has the plumbing exposed. The sink will be opposite side of the sink shown. The pipes drain to the right. The 90 degree fitting at the left goes to the finished side and then up to the master bathroom. The basement has an exposed french drain on the perimeter. (the finished part of the basement is an addition - that is why you see the exposed french drain there. The horizontal main pipe is 24" above the floor.
1 - You can see a cast iron pipe/cleanout that feeds from the open french drain and under the concrete. Is this some sort of air vent for under the floor? Wouldn't this back sewage to under the floor if something downstream plugged?
2 - I known water goes downhill, but how much higher than the main horizontal pipe should be sink drain be to keep the master bath drain from filling into the sink? And I would want the sink drain to no go down the vent pipe.
The sink is just for occasional use so it can be higher than normal. Or I'm ok with putting a pump in if that is better.
Jim
1 - You can see a cast iron pipe/cleanout that feeds from the open french drain and under the concrete. Is this some sort of air vent for under the floor? Wouldn't this back sewage to under the floor if something downstream plugged?
2 - I known water goes downhill, but how much higher than the main horizontal pipe should be sink drain be to keep the master bath drain from filling into the sink? And I would want the sink drain to no go down the vent pipe.
The sink is just for occasional use so it can be higher than normal. Or I'm ok with putting a pump in if that is better.
Jim
