DWV Layout Bath & Laundry

Hackney plumbing · Jan 30, 2012

N0rm said:
Thank you guys for the input, Hackney even I can understand your visual aid. There's no doubt in my mind if you had professional drawings you could assemble it, box it and send installation instructions. Understand your major and minor for the laundry, and the revent or not if it will keep the code man happy, I will do it. The one thing I still don't have clear is venting the shower, someway I can tie it back into the three-inch stack with the cleanout or should I just vent it separately.

I stated in my first posting this site had become my favorite forum, It's all because of folks like you who will contribute your knowledge to a perfect stranger and contributors like Hackney Plumbing who says maybe the guy will understand if I go out in my yard and lay it out and take a photograph of the layout and posted it. May be it will help the retired old man do what he loves to do; work hard every day and stand back in the evening and looked at his accomplishments with help of others.
Thanks
Norm

Glad I could help! To vent the shower just install a wye between the connection to the main building drain and the P-trap for the shower. Part of this wye will be used to extend a vent to any wall and up.

The idea is to place the vent between the trap and the connection to the larger building drain. This will protect the p-trap from siphonage.

If this is not clear I will snap you another pic and show the shower. It can vent seperate or you could revent it back into the 3" stack....atleast 42" above the floor.

Hammerlane · Jan 30, 2012

To vent the shower just install a wye between the connection to the main building drain and the P-trap for the shower. Part of this wye will be used to extend a vent to any wall and up.

Like Hackney said if you revent have have to observe guidelines on the height you tie back into the main vent. Hackney said 42" above floor and I also believe at least 6" above the highest draining fixture on that stack.

Sponsor · 2022-01-29T12:20:58-0800

Hammerlane · Jan 30, 2012

Connecting vents below flood height of highest fixture

N0rm · Jan 30, 2012

Thanks again I think I'm good to go how I will post a drawing in a day or so.

Norm

N0rm · Jan 30, 2012

Posted are some drawings based on the recommendations I received to the best of my understanding. I would appreciate any input recommendations or opinions.

Thanks
Norm

Hackney plumbing · Jan 30, 2012

Connect your revented shower higher. It should be connected 42" or above. Looks good,now take that to the inspector with sizes and developed lenghts. Need a job?

Where the washer and the laundry sink connect to the vertical.....those are fixture fittings I assume. They look like combinations,that would not pass with me.

Dlarrivee · Jan 30, 2012

The first thing I noticed was the combos instead of sanitary tees on where you trap arms meet the stack.

Hammerlane · Jan 31, 2012

dlarrivee said:
The first thing I noticed was the combos instead of sanitary tees on where you trap arms meet the stack.

Yeah Norm. Double check with your inspector to make sure you can use those combos(circled in red) I think they should just be a Sanitary Tee.

But if you watch this youtube video by Protech plumbing he shows no trap siphonage using the combo.

http://www.youtube.com/watch?v=CNtf0LPtEL4&feature=mfu_in_order&list=UL

N0rm · Jan 31, 2012

Thanks again, those are combo fittings. I will look up Charlotte pipe specifications for sanitary tee and make some. There are a few fittings on the web, but I could not find any to the manufacturer’s size, layout specification. Which was very important trying to fit all of this within the confinement? How about the inverted combo fitting tie-in to the stack for the shower? I'll make some changes and add some dimension and be back.

Thanks
Norm

Hammerlane · Jan 31, 2012

N0rm said:
How about the inverted combo fitting tie-in to the stack for the shower? I'll make some changes and add some dimension and be back.

Thanks
Norm

That could also be a San-T(inverted because of being for vent). Don't know if its a problem being a combo since its for venting.

Dlarrivee · Jan 31, 2012

I don't really care if some random YouTube video disagrees...

We aren't here to debate, common practice is to use a san-tee, why you would INSIST on using anything else is beyond me. And the code books agree.

Hammerlane · Jan 31, 2012

dlarrivee said:
I don't really care if some random YouTube video disagrees...

why you would INSIST on using anything else is beyond me. And the code books agree.

Where did I insist on anything?

N0rm · Jan 31, 2012

Here is a combination of your advice. If there is anything please let me know otherwise I will buy some fittings and pipe and do a mockup for the inspector when he is here doing the rough-in electrical inspection.
Thanks. All of your input has helped me get to this point.
Norm

N0rm · Jan 31, 2012

Let's try a new font size.
Norm

Hammerlane · Jan 31, 2012

Since you're going to have walls open and what not would it be adviseable to put access to clean-out in the vertical drain that picks up the bath sink. This could also be used for any toilet clogs downstream of the combo if needed.

See what Hackney says.

Hammerlane · Jan 31, 2012

Norm....what program did you use to do your diagrams?? Is it free??

Cwhyu2 · Jan 31, 2012

Hammerlane said:
Norm....what program did you use to do your diagrams?? Is it free??

I would like to know too.
Your last isometric looks fine to me and if you add pipe sizes then it would be perfect.
Good job Norm.

N0rm · Jan 31, 2012

Hammerlane the present location of the cleanout is in the laundry room with the 18 inch clearance by code. The total sewer will run a little over 100 feet through the house. The inspector wanted the cleanout at the very start which is at the laundry room and would not require any additional cleanouts.

The program I use is Google's Sketchup 8 Pro but there is a Google sketchup 8 which is free for downloading. Very easy to use and very intuitive. Hi CWHYU2 I had put pipe sizing on the previous posted drawing and overlooked it on this latest one, I blame it on old age.

Thank you guys, Norm

Dlarrivee · Jan 31, 2012

Hammerlane said:
Where did I insist on anything?

The guy in the video is trying to prove a point.

He also uses a 2"x2"x2" with a 1.5" line feeding into it...

Dlarrivee · Jan 31, 2012

Also, how about a re-vent on the laundry standpipe, and everyone is okay with the flat vent on the shower below the floor?

DWV Layout Bath & Laundry

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