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nate220 · Sep 10, 2008, 10:47 AM

I am thinking of moving the basement laundry room and putting in a new bathroom. From reading all of the posts, I think I have a decent handle on what needs to be done. I have attached my proposed layout.

Are there any problems with this?

My one concern is the floor drain. I need some way to drain water in case something happens to my HW heater per the local inspector. I could use a pan and pump for this, but its located 30' plus feet away and don't really want to run the pvc pipe.

I do have a 3/4" drain line for the condensation for the AC, would this line be large enough if I tapped into it? If not, how large should the drain pipe be for the indirect drain if I chose this way?

speedball1 · Sep 10, 2008, 11:30 AM

Hey Nate,
Check with your local Building Department about wet vents and using AAV's. I would much rather see a vent through the roof here.l

I do have a 3/4" drain line for the condensation for the AC, would this line be large enough if I tapped into it?

3/4" Pvc is what we use on heater pan drain lines. If you can't put bit of slope on the pan drain I'm afraid that the AC condensate will drain into the heater pan. You could install 3/4" check valve on the pan drain and be safe that way also. Good luck, Tom

ballengerb1 · Sep 10, 2008, 11:43 AM

If you are busting up the floor anyway I'd suggest that you make your washer stand pipe and drain line 3" which is what the 2009 code calls for. I'd also ask that inspector what he thinks about a HW pan with a condensate pump connected to it. Last but not least do you have a reason for running separate drain lines for the washer and the laundry tub, they can both be on that one new 3" pipe.

nate220 · Sep 10, 2008, 12:21 PM

There is only one drain line for washer and laundry sink. The other line is for the floor drain (if I use one). Could the floor drain come off from the washer line. I will upgrade the washer/laundry sink line to 3".

If I tapped the heater pan line into the AC condesation line, I was assuming I would be using a pump and therefore tie into the AC line from above.

[QUOTE=speedball1]Hey Nate,
Check with your local Building Department about wet vents and using AAV's. I would much rather see a vent through the roof here.l

I would too but I do not have any easy way to get to the attic. I am going to try to set at least the vanity sink vent up so that I can remove the AAV and run into the attic when I redo the bathroom up above

One more thing, if the washer laundry sink line is 3", should I keep 4" from the main past all the wyes then reduce to 3" before the toilet?

ballengerb1 · Sep 10, 2008, 12:36 PM

That's more of a rough in question up Tom's alley but I think 3" all the way to the main is fine, what do you think Tom?

speedball1 · Sep 10, 2008, 03:16 PM

I would run 4" all the way to the toilet, 3" from the laundry tray and washer and 2" from the lavatory. Good luck. Tom

ballengerb1 · Sep 10, 2008, 03:53 PM

So there you have it, from a professional plumber who has done rough ins for many years. Glad to see Tom recommends a 3" from the laundry tub.

nate220 · Sep 11, 2008, 06:01 AM

Thanks for the great help.

One last question
There is only one drain line for washer and laundry sink. The other line is for the floor drain (if I use one). Could the floor drain come off from the washer line or should it tie into the 4" line running to the toilet.

speedball1 · Sep 11, 2008, 06:29 AM

Originally Posted by nate220

Thanks for the great help.

One last question
There is only one drain line for washer and laundry sink. The other line is for the floor drain (if I use one). Could the floor drain come off from the washer line or should it tie into the 4" line running to the toilet.

I would connect the floor drain to the toilet branch. Less chance of a back up there because the toilet discharges by gravity while the washer discharges under great force. If the floor drain was on the washer line that would make it the lowest fixture and more subject to backups. Good luck, Tom

nate220 · Sep 19, 2008, 01:01 PM

I was thinking of just putting in a floor drain and eliminating the washer stand pipe, this would mimic my current situation. I would drain the laundry sink into the floor drain and the washer into the laundry sink. Are there any problems with this?
If I did this, can the floor drain be 3" or should it be 4".

If I kept the washer standpipe and drained the laundry sink into that line, should I be worried about the water in floor drain's trap evaporating since nothing is draining to it?

speedball1 · Sep 20, 2008, 07:41 AM

I was thinking of just putting in a floor drain and eliminating the washer stand pipe, this would mimic my current situation. I would drain the laundry sink into the floor drain and the washer into the laundry sink. Are there any problems with this?
If I did this, can the floor drain be 3" or should it be 4".

This is called a indirect waste and will be acceptable. I would make the floor drain 3 inch.

If I kept the washer standpipe and drained the laundry sink into that line, should I be worried about the water in floor drain's trap evaporating since nothing is draining to it?

Youb can cap off the washer stand pipe or pour a quart of cooking oil down the stand pipe and forget about evaporation. Good luck, Tom