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colesy 03-23-2013 08:00 AM

Floor Drain Question
Hello all, first post here. I used to frequent another forum for this type of thing, but it recently shutdown. I am hoping to be become a contributor here, both asking questions, and offering help when I can.

My question has to do with installing a floor drain in my main floor laundry room. What size of floor drain, and trap/pipe would a typical floor drain use? I will need to buy the floor drain, trap, and a length of pipe. For more information about the project read below.

We are doing some renovations in the laundry room, and I have always thought a floor drain would be a good idea in there. That thought was further confirmed when my wife accidentally overfilled the laundry tub a few months ago.

Currently we have hardwood in the laundry room and throughout the main floor. The laundry room is where we come in from the garage, so tiling seems like a better option. So I plan on pulling up the hardwood in the laundry room, and replacing it with tile. We just purchased the ditra, tile, thinset, and grout yesterday.

I need to figure out the best way to do the drain. I have access in the basement and a main drain pipe not far from where I would put the new floor drain. There should be lots of room to make sure pipe is sloped properly.


joecaption 03-23-2013 08:06 AM

#1 Please go back and add your location to your profile.
Go to Quick links to edit.
#2 Post some pictures so we can see what your seeing.

colesy 03-23-2013 08:48 AM

I will take pictures, but all you are going to see is a hardwood floor, so I'm not sure how helpful that would be. This is a new install, not replacing existing. I don't really need help on installing it, more just the proper size of pipe. I know codes are different everywhere. From what I understand of my local code, if I can manage a 3" pipe and it doesn't exceed 12' and I am tieing into a main stack, I don't need to vent it.

Javiles 03-23-2013 08:58 AM

Not familiar with Canadian plumbing code but this is basic plumbing. will need to be vented will need to have a trap primer, and 2 or 3 inches is ok depending on what you have in the ground.

joecaption 03-23-2013 09:05 AM

Was looking for a picture below the floor not above it to see how to run the line.

TheEplumber 03-23-2013 09:50 AM

199 Attachment(s)
What's the main purpose of the drain? Might be cheaper/easier to put the washer into a pan.

joecaption 03-23-2013 10:16 AM

colesy 03-23-2013 11:34 AM


Originally Posted by TheEplumber (Post 1143707)
What's the main purpose of the drain? Might be cheaper/easier to put the washer into a pan.

The washer already has its own drain. This is a peace of mind drain only. Most laundry rooms that aren't in the basement have floor drains, around here anyway.. Actually, I see a lot of floor drains in basement laundry rooms as well. Just in case something overflows, which happened to us when my wife forgot she turned on the laundry tub water. In that case the damage was minimal anyway, because we caught it pretty quick, but it could have been way worse, and avoided had there been a floor drain.

jagans 03-23-2013 06:24 PM

You might want to think about an overflow tube in the drain of the laundry tub instead of a plug. Not to disuade you from your project, but I think I would put in a wet set tile floor if I was going to install a drain in it, or if I was installing a floor that was going to get really wet. I guess thinset is OK for walls, not so sure about floors that are going to be flooded. Im sure the tile pros will be along soon, though.

cleveman 03-23-2013 07:46 PM

You can put in a floor drain, no problem. I think you mentioned a 3" drain. Most are installed with a 2" drain.

Sure, it is great to have a floor drain, but how will the water get there? I mean if your floor is level, it will be just as likely to flood your entire main floor.

Alan 03-24-2013 12:02 AM

If you put in a trap, you'll need a trap primer installed in the wall as well to keep the trap from drying out.

By UPC standards if you tie into a vented line within 6 feet of the floor drain you won't need to worry about venting the floor drain.

jagans 03-24-2013 05:07 AM

With a wet set you can put in slope to drain, but then what about the height at the threshold? Great idea, but a littel difficult to execute properly. Who in the heck puts hardwood in a laundry room ? Martha Stewart?

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