I want to add a full bathroom to my house in the basement and I want to do it
right (i.e. meet all the codes, avoid future headaches that short cuts tend to
cause, etc.). Where do I go to find out the requirements I need to meet? For
example, I was told that I need to run a trench in the existing cement floor
for the sanitary line and the shower drain which would mean jack hammering the
floor. Obviously I don't want to do that unless I HAVE to.
And a concrete saw. I would recommend renting a wet saw to cut down on the
dust it will create. Putting a concrete blade on a circular saw will be
time consuming, very dusty, and put a LOT of load on your saw, possibly
destroying it. Then again, it might be a good excuse to go out and buy a
contractor grade saw.
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You could go with a sewage ejection pump but I wouldn't recommend. They're
noisy and need to be replaced/cleaned every so often.
Bite the bullet and hire a plumber to do the nitty-gritty work of stubbing out
and installing the waste lines. Depending on the location of the supply pipes
and the DWV it could be as little as $600-800. The plumbing work on my
basement bathroom (which includes a W/D area) ran about that. Of course I was
only 4 feet from the main drain for the toilet and six for the shower. I'm in
NoVA, and the prices here aren't very cheap. Of course the guy who did it was
a buddy and I worked around his schedule (i.e., let him do it at his
convenience), paid him cash and pulled the permits myself, all ways of cutting
The finish work is where you'll save money by DIY'ing, especially if you're not
skilled in plumbing (as your questions imply)
Dug a channel in the concrete. Had to dig it pretty deep to preserve the 1:12
slope since we were only going 4 ft from the main waste pipe. Would've gone 6
feet had it not been for the fact that placing the sink in the corner and the
commode in the middle would have looked odd.
Used an electric jackhammer after outlining the channel with a concrete saw.
To be fair, we're on a lot that sits a good 7 ft. above the street on the front
corner, and the waste pipe slopes steeply from the back corner of the house.
I'm not certain what the OP's situation is but if you've got enough fall from
the waste pipe to the main sewer and you can tap in under/in the slab you
should be OK.
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