I'm asking if it is possible to add a laundry sink in my garage. The laundry room is inside the house across the hall, so there are no laundry fixtures in the garage.

What I have is a hot water tank on a platform about 18" above the garage slab. There is a clean-out plug coming out of the wall next to the tank. The laundry sink would need to set on the slab. There is no drain hole in the garage slab.

Can this be done? If so, please describe the installation. I'm in Washington State.

Ed

You can easily get both your hot and cold supply from the water heater. That leaves a vent and a drain. The vent could be an AAV on the lateral pipe just after the trap or you could run a vebt stack up the wall and through the roof, I'd go AAV. Now for the drain, you said clean out plug, is this a drain or current stack and how high off the floor? Is your home a slab or is there a basement or crawl?

Drain access / location is the starting point. Put sink close to another plumbing fixture. You can always bring water to it, that's no problem.

The garage has no fixtures - just a hot water tank. The garage is on a slab and the house has a crawl space.

I don't know if the plug next to the tank is a drain or a vent, but it is black and 3.5" in diameter.

The wood platform that holds the tank and gas furnace above the floor has a hole where an installer added a T and extended the gas line down and over into the kitchen when I converted from electric to gas range. So it looks like another hole added nearby would gain access to the crawl space. The closest drain then would be the laundry room about 16 feet away.

With a laundry tub on the slab, its possible (with having measured) that the drain may have to go up, over, then down into the crawl space. I assume a pump is needed in this case?

Ed

Is the water heater installed against the wall that has the raised foundation ?

PNWguy:

You want to see if you have access from the crawlspace to bring a pipe over to the wall in the garage. That pipe will need to pitch at 1/4" per foot and it should end up at 15-18" off the garage floor IF this is going to work using the waste pipe from the house.

Otherwise, let us know if that 3.5" cap is in the wall or in the floor? A picture would really help here.....

Finally, if waste piping turns out to be a problem you could always install a LAUNDRY PUMP system without having to bust up any concrete.. ;)

Check out www.saniflo.com for more info. On laundry pump.

Let us know all you can.

MARK

To answer questions:

The black 3.5" plug is flush with the wall about 2' above the raised platform holding the water tank.

The water tank is next to a wall that separates the house from the garage slab. The crawl space begins below that wall.

After re-thinking my needs, I really don't need a laundry tub. What I need is a sink to wash my hands, as I'm always running into the kitchen to clean up and messing it up.

A bathroom style wash basin could be mounted on the wall next to the water tank. This would elevate the drain much better than a tub sitting lower on the garage slab. The sink drain can go down through a hole in the raised platform and connect in the crawlspace. Then I guess a AAV would work for a vent.

You said it: you can run new drain into crawl space where there is many places to connect. Same with water supplies.

Let us know if you need any other help during installation...

You can easily get your hot/cold supplies right at the water heater rather than down in the crawl.