I would like to move my laundry room to an adjacent room and combine it with a (new)full bath. The current laundry plumbing and waste is on an outide wall and the room has a floor drain in center about 6' in. The kitchen plumbing and waste is 10' away on the same outside wall. The waste line exits the other end of the house after picking up the first and second floor bathrooms at that end. Construction is slab on grade and the house was built by a very reputable contractor in 1965.

Where should I try to find adequate waste capacity, at the floor drain, or by digging under the foundation from the outside to see where the washer or sink ties in? I am sure that the existing Laundry room is at the end of the waste line that passes under the foundation.

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Originally Posted by Michael Schumacher

I would like to move my laundry room to an adjacent room and combine it with a (new)full bath. The current laundry plumbing and waste is on an outide wall and the room has a floor drain in center about 6' in. The kitchen plumbing and waste is 10' away on the same outside wall. The waste line exits the other end of the house after picking up the first and second floor bathrooms at that end. Construction is slab on grade and the house was built by a very reputable contractor in 1965.

Where should I try to find adequate waste capacity, at the floor drain, or by digging under the foundation from the outside to see where the washer or sink ties in? I am sure that the existing Laundry room is at the end of the waste line that passes under the foundation.

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Hi Michael,

You might use the floor drain line to pick up the lavatory or shower but to rough in your toilet you're going to have to run a 4" branch to the 4"sewer main. I live in Florida where all our homes are on slabs. Face it my friend, you're going to hafta jackhammer up some cement to install your bathroom.
More questions? I'm as close as a click. Regards, Tom

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Originally Posted by speedball1

Hi Michael,

You might use the floor drain line to pick up the lavatory or shower but to rough in your toilet you're going to have to run a 4" branch to the 4"sewer main. I live in Florida where all our homes are on slabs. Face it my friend, you're gonna hafta jackhammer up some cement to install your bathroom.
More questions? I'm as close as a click. Regards, Tom

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Speedball1
I have no problem busting up concrete, I just want to try to start in the proper spot. Shouldn't the 4" sewer line come to that end of the house since it is picking up 2 floor drains, 2 sinks, DW, and washing machine? Is there a way to detect where it might be?

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Originally Posted by Michael Schumacher

Speedball1
I have no problem busting up concrete, I just want to try to start in the proper spot. Shouldn't the 4" sewer line come to that end of the house since it is picking up 2 floor drains, 2 sinks, DW, and washing machine? Is there a way to detect where it might be?

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If we don't have a set of plans to go by we start at the house cleanout and work from there. We look at all the fixtures and lay the job out in our head. Since we all work according to code we can come pretty close to what's under the slab.
You ask," Shouldn't the 4" sewer line come to that end of the house since it is picking up 2 floor drains, 2 sinks, DW, and washing machine?"
That would make sense to me. Regards, Tom