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Started By
Message
Adding new sewer drain concrete slab house
Posted on 4/29/24 at 6:42 pm
Posted on 4/29/24 at 6:42 pm
The house is old and adding 1/2 bath to portion of house that doesn’t have easy access to sewer drain. Thus we have to cut/bore a hole through slab to get to soil and then trench to existing sewer line outside.
Is there a standard practice for how this is done retroactively through foundation? Do you drill down and then horizontally out through beam that is approx level (higher with grading) with drain? How about connecting sink to toilet inside. Trench inside, pipe and pour new concrete?
I tried googling but hard to describe and not getting accurate results
ETA: requested to move boards. Forgot about home board
Is there a standard practice for how this is done retroactively through foundation? Do you drill down and then horizontally out through beam that is approx level (higher with grading) with drain? How about connecting sink to toilet inside. Trench inside, pipe and pour new concrete?
I tried googling but hard to describe and not getting accurate results
ETA: requested to move boards. Forgot about home board
This post was edited on 4/29/24 at 6:45 pm
6
Posted on 4/29/24 at 6:44 pm to TulaneUVA
Just wing it.
And above all else…Definitely get all of your advice from the OT.
And above all else…Definitely get all of your advice from the OT.
Posted on 4/29/24 at 6:45 pm to 0x15E
Sounds like I should just keep drilling!
Posted on 4/29/24 at 6:47 pm to TulaneUVA
Jack hammer.
Posted on 4/29/24 at 6:50 pm to TulaneUVA
Cut the slab, break out concrete and trench. Install pipe, backfill and replace concrete.
Posted on 4/29/24 at 6:56 pm to TulaneUVA
LINK
More or less the same applies to adding a drain. The further you are from the main drain line you’re trying to hit, the more cutting and hammering you have to do. It’d be ideal if it was on an exterior wall close to where your main drain heads towards sewer/septic. You could hammer just enough to get the new drain out of the slab and tie into the existing drain line out from under the slab.
More or less the same applies to adding a drain. The further you are from the main drain line you’re trying to hit, the more cutting and hammering you have to do. It’d be ideal if it was on an exterior wall close to where your main drain heads towards sewer/septic. You could hammer just enough to get the new drain out of the slab and tie into the existing drain line out from under the slab.
Posted on 4/29/24 at 7:17 pm to Frankenswine5150
I’m probably not describing it right.
The portion in yellow is what I have to drill and create.
The portion in yellow is what I have to drill and create.
This post was edited on 4/29/24 at 7:18 pm
Posted on 4/29/24 at 7:54 pm to TulaneUVA
cut it, break it, rough in the drain and tie in, have it inspected, pour it back
It’s done all the time
It’s done all the time
Posted on 4/29/24 at 8:27 pm to cgrand
Thats helpful. Think the key to what you said that makes me feel better is “pour it back ”. Thanks.
This post was edited on 4/29/24 at 8:28 pm
Posted on 4/29/24 at 9:26 pm to TulaneUVA
By your drawing, it’s pretty straightforward. But the simplest way is still going to be cut the concrete as close to the wall as you can cut it. Bearing in mind, you’re only cutting a notch that’s 7”-8”s wide. Then you can hammer out and down through the concrete. But you do want to be several inches below ground when you breakout of the slab. That way you avoid exposing the pipe when you backfill on the exterior.
Posted on 4/29/24 at 10:17 pm to TulaneUVA
quote:
Is there a standard practice for how this is done retroactively through foundation? Do you drill down and then horizontally out through beam that is approx level (higher with grading) with drain?
For me, lots of planning, layout, and area prep. Then I grab my SDS+ and SDS Max hammer drills, gas-powered concrete demo saw, and probably a pair of angle grinders with cutting/grinding wheels for both metal and concrete, some hand tools for digging/prying, then curse myself for the mess I am going to have to clean up. Plumbing in the water lines, sewer connection, clean out, and vent pipe, proper backfilling, then patching the concrete will be a lot of work too. Assuming with the older house you aren't dealing with post-tensioning but there might be rebar you could run into which is always fun.
Yeah, that's not a job I'd want to tackle unless I had a few days without interruption and some good beer waiting in the evenings.
Posted on 4/29/24 at 11:17 pm to TulaneUVA
I happen to have a buddy who owns a small directional drilling business mostly doing fiber optic cabling and stuff like that. My neighbor was bitchen to him about a similar project but his was due to old collapsed clay pipes. Dude brought his rig over and directionally drilled the new line so they basically just used the existing concrete hole. It kinda blew my mind. Used exactly the right depth and fall to make it work like new.
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