I am relocating washer and dryer in a garage that was remodeled by the original owners to have two bedrooms and a craft room. This remodel is very dated and disjointed and we are wanting to add a bathroom in this very large craft room, but it is on the other side of the house from the main bathrooms and the rest of the home was JUST refloored. Very near the remodeled area though is the outdoor clean out that then connects to the main house. It is close enough the cleanout couldn’t be more than a foot top to bottom below the surface. As I am unsure where the waste lines are located I feel it would be more reasonable to tie in between the clean out and the rest of the plumbing (just outside of the house) and have a separate vent stack for the bathroom addition and washer.

We currently have a concrete slab throughout and an ugly linoleum in the area for the bathroom addition. The closest drain I could tie into otherwise is a kitchen sink which would likely be undersized for my overall purposes.

Any reason why I shouldn’t proceed with the addition this way?

I’ve attached an image of the layout with approximations if he plumbing. I would rather not destroy expensive brand new floor if I could instead go through the linoleum located in the garage area and two adjoining bedrooms. enter image description here

  • I mean to ask, if my property’s lateral line has a cleanout four feet from the front of the house that then runs to the main waste lines within the house that branch northward, could I not install essentially a new line between the cleanout and the house with 4” pipe creating a y that leads to my new fixtures southward fifteen feet away with their own vent stack? The new fixtures will be much closer to this cleanout than the existing fixtures so the ability to produce at least minimum slope to the cleanout area is better than if I were trying to meet the old plumbing.
    – Uggymunkey
    Commented Oct 31, 2017 at 21:15

1 Answer 1


Allow me to recommend you call a licensed and reputable plumber to come and look at your house and make recommendations. Surely you can find someone who for $150.00 will come and tell you what you can do. You could go the sly route and request a quote, you could offer to pay for it, and then ask a lot of questions. Make sure to ask for and get, with your quote a simple drawing and piping lay out. Good Luck.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.