Use cleanout for sink drain
I have a basement bathroom that lacks one thing...a sink.
Three options present themselves...
1. There is a cleanout. a 24"x18" vanity would cover it nicely, so I could open the cleanout and put a new PVC cleanout and some fittings for a 2" drain, and set the vanity over it. I would need to find a path for a vent stack. It might be hard to get all the way to the attic without demolition. There is a 2" cast iron pipe that seems to head toward the pipe chase where the soil stack is, might be a vent, but I don't know how hard it is to tap into that.
2. The soil stack is nearby, but it is cast iron. One plumber said that's a big job. I read a bit about it, and I am not so interested in that job.
3. There is a sink that replaces a toilet lid and you can wash your hands for free with the water that will refill the tank. People who were willing to try it seem to like it. The ad says it is easy to install.
The factors are:
1. a real vanity would add more value to the house - and that is the reason for wanting to do this now, for a refi.
(The cost to implement 1 or 3 would be similar, about $150), though I really would like any sink soon.
2. The tank-lid-replacement stunt probably does not require a permit. Getting a permit would add expense, and might just be enough to make me get a plumber.
3. If I open the cleanout to stub it up to a new cleanout, am I going to have a flood? This cleanout is probably as low in the house as anything else. (in other words, is a cleanout going to be full of water? under pressure?
4. Would I really need to have a new cleanout? Above the toilet in this same room is a PVC with a cleanout, but it is not directly on the pipe out to the street. There is one 90 degree to the main stack, and another to get to the street. A second floor-level cleanout is across the basement further from the street.
I appreciate your comments and insights