basement bath remodel, need some under slab and vent help

[Dlarrivee]

hj is a washer considered a "major" fixture?

For example if a properly vented washing machine (2") tied into a 3" drain after the lav(2") but before the shower(2") and the w/c(3"), would this be considered a major over minor violation? The bathroom was originally set up to wet vent through the lav.

 

[Hackney plumbing]

hj is a washer considered a "major" fixture?

For example if a properly vented washing machine (2") tied into a 3" drain after the lav(2") but before the shower(2") and the w/c(3"), would this be considered a major over minor violation? The bathroom was originally set up to wet vent through the lav.

Correct you cant wet vent a toilet and shower with a washing machine upstream.

 

[Sponsor]

 

[Dlarrivee]

Correct you cant wet vent a toilet and shower with a washing machine upstream.

Increasing the diameter downstream of the connection wont make a difference code wise will it? About the only option is tying the washer downstream of the whole bathroom?

 

[Hackney plumbing]

Increasing the diameter downstream of the connection wont make a difference code wise will it? About the only option is tying the washer downstream of the whole bathroom?

Or have it vented...no wet vents. Now I'm speaking from my experiences,I cant speak about every code out there. Codes can vary from county to city with different ammendments etc etc...it can get to be a real mess.

Washing machines have special consideration because they have a pump and they produce suds.

 

[Dlarrivee]

I'm talking about retro-fitting a laundry drain into an existing system, trying to solve a debate between an acquaintance and myself.

I'd be most worried about it siphoning the shower trap dry, or having double-drainage issues if the toilet is used at the same time as the washer. Bumping up to 3" may solve this issue somewhat, but maybe not legally.

Talking about weird code issues though,

For example in Canada you're allowed to use a 3" p-trap to create an "emergency" floor drain without it's own vent, the piping downstream would obvously need to be 3"

 

[Hackney plumbing]

Plenty will work and work forever that doesn't meet code,from your posts,you know that. I found that out along time ago. If your asking me if a washing machine upstream of a toilet and shower wet vented through a horizontal 3" pipe .........then I would agree it would work. Its a combination waste and vent system basically. It would be better if the pipe could be 4".

 

[Kentd]

The other problem is if you make the toilet vent dry, it must be vertical. (no less than 45 degrees to the floor).

Your existing layout would be fine here, if you installed a separate vent for the shower.

Unfortunately, I can't see how to get to a wall for a separate vent for the shower.

 

[Kentd]

I can get rid of the existing wet vent and put in a dry vent that will be at 30 degrees. That might have to be good enough.

Kent

 

[hj]

quote; if the toilet tied in last, you wouldn't have major-over-minor, now would you?

Actually, that would ensure that EVERY unvented connection, such as that shower and maybe a floor drain, would violate the major over a minor rule. As far as the washer, it is "major" compared to tubs, showers, and sinks, but a "minor" to a toilet. So it cannot be connected above a lavatory or laundry sink, but here, they can be above the washer. Installing the "yellow" line vents the shower, and ALSO the toilet so the existing vent becomes superfluous and should be removed to eliminate the "flat vent" problem.

Or you can just turn the shower "Y" on its back, like the existing toilet vent, (you can roll it down towards the wall if you need the shower connection farther below the concrete), remove the toilet vent "Y", install a combo out of the "new Y" for the shower then reconnect the existing toilet vent to the combo. Much simpler and cleaner.

 

[hj]

Dlarvaree: HOW you do it will determine whether it will create problems. Before we can say anything we would have to know how you plan to do it, NOT what you want to do.

 

[Kentd]

Final revision?



Yellow shows the new drain line for the toilet and also the "Y" on its back that brings in the combined shower and lav drain.

Red shows the 'upper level' "Y" on its side for the shower branch and the rest of the shower branch. Also shown in red is the new lav drain line.

Blue shows where I want to bring in a bar sink drain from an adjoining room. I am showing a vertical santee connection below the bathroom lav santee.

Note: Existing "Y" on its back next to the toilet will be deleted.

Note: Toilet riser is 4", toilet drain line is 3".

Note: Bar sink drain branch and lav drain branch are 1 1/4".

Note: Everything else not listed above is 2".

And, finally, if I need the room, I can rotate the "Y" on its back either closer to the wall or closer to the shower drain. Is that right hj?

Thanks,
Kent

 

[hj]

quote; Note: Bar sink drain branch and lav drain branch are 1 1/4".

WHERE are you getting 1 1/4" pipe and drain fittings? I know they are made, but I have NEVER seen any. I would HATE to ever have to snake a 1 1/4" drain and do it properly. Correct, but it would be easier to rotate it towards the wall to make the shower connection easier, since it would give more room for it.

 

[Kentd]

quote; Note: Bar sink drain branch and lav drain branch are 1 1/4".

WHERE are you getting 1 1/4" pipe and drain fittings? I know they are made, but I have NEVER seen any. I would HATE to ever have to snake a 1 1/4" drain and do it properly.

Whoops! I meant 1 1/2".

Didn't mean to give you a heart attack on a Friday at 5 o'clock.

Thanks again for the advice. I truly appreciate it.

 

[hj]

quote; Didn't mean to give you a heart attack on a Friday at 5 o'clock.

It would not be me. It would be whoever had to snake the plugged up drain., and HE/she would be making a lot of comments about your ancestors.

 

[Kentd]

Is that bar sink drain connection allowed in the middle of this wet vented bathroom group?

 

[Kentd]

Here is the finished product. Any concerns?

 

[Kentd]

I must either be more awesome at this plumbing stuff than I thought! Everyone is speechless!

Either that or I am beyond all hope.

 

[Cacher_Chick]

The layout looks good. Might just be the photo, but the lav drain looks like it needs some pitch. You should have fun getting that all bedded in properly.