Is my rough-in diargam correct?

wkendwarier · #1 Sep 1, 2009, 01:07 PM

I am preparing to install some drains in a concrete slab and wondering if my attached diagram looks correct. This is a single story home and I am converting the utility room. I am ready to start but I was hoping someone with more knowledge than myself could please verify that everything does look correct. I appreciate any assistance on this.

Milo Dolezal · Sep 1, 2009, 01:16 PM

I work under UPC. Under UPC it would be incorrect ( Not enough vents ). Pipe sizes seem to be OK. However, let's wait for our Experts who work under different Codes to offer their opinions. Thank You.

wkendwarier · Sep 1, 2009, 01:34 PM

Thank you for the prompt reply. There is another vent. Where the drawing leaves off, it ties to the main which is also vented. This is a single story house so I'm not sure if you still call it a stack.

Milo Dolezal · Sep 1, 2009, 03:32 PM

Nicely drawn and explained Mark ! Wanted to leave positive feedback for you - but got the usual message..... Milo

wkendwarier · Sep 1, 2009, 04:46 PM

Hi Massplumber

You just about nailed it. The only difference, in my scenario, there is an existing vent right in the middle of your long sweep elbow. The existing pipe is steel which I will disconnect and replace with PVC. The new lavatory will be centered in front of the vent so I was going to put a T facing out and just borrow the hole in the ceiling and redo the vent in PVC. The toilet sits about seven feet from the vent.

Thanks for the drawing!!! This really helps a lot. The vents are making more sense now. I can easily add a vent for the shower and I will post another drawing tomorrow. So the sinks need thier own vents because they sit higher and the shower and toilet can be "wet vented" if they are close enough to another vent?

So a "dandy cleanout" is a wye at the trap with a plug on the inside of the room?

I have attached another drawing to give a better idea of the layout. I left the kitchen sink off this drawing but it sits about 8 feet to the right of the lavatory. The existing vent in the bathroom penetrates the roof so I'm wondering if I can tie all of the vents together including the kitchen sink and use just one roof penetration or does the kitchen sink require its own? Also, you mentioned the vents tie togther 48" off the floor, they can be higher, right? I would like to run the horizontal pipe through the attic.

Heres the drawing

How about this for a layout? I have modified the pipe runs so the washer connects closer to the toilet. I have already laid the horizontal pipe and stopped at the long sweep elbows. I just want to verify that my venting is correct before I start cutting holes in my roof. I have been reading other posts that say you can vent the entire bathroom group off the lav, however in my case the lav is downstream of everything else but the vent is already there. I would have to cut through the roof for the vent for the washer. The main pipe run is 3" and everything else is 2". Washer and shower will both have 2" traps. I have no problem running these vents I just don't want to create more work for myself than necessary. Thank you.

I am not sure I am using the site properly because I have added to my post but have not gotten a response. FAQ says you should click "edit" to edit your post but I don't see the edit button so I don't know if I posted correctly or not.

The original post is here:
http://www.askmehelpdesk.com/plumbin...ct-392534.html

The only relavent drawing is the very last one and the only relavent paragraph is also the last one. Can someone please tell me if my drawing is correct?

I am a newbie to posting, thank you.

wkendwarier · Oct 26, 2009, 04:00 PM

Hi Mark,

Thanks a lot for the advice. I can easily add a vent for the toilet and dandy cleanouts as well, this makes perfect sense. This advice is exactly what I needed as I would rather have the job done CORRECT the first time. And besides I did not wait long at all. I just posted my revised drawing the other day. Thanks again for steering a weekend warrier in the right direction.

Derek



At Ask Me Help Desk you can ask questions in any topic and have them answered for free by our experts. To ask questions or participate in answering them you must register for a free account. By registering you will be able to: Get free answers from experts in any of our 300+ topics. Accept money for answers that you provide. Communicate privately with other members (PM). See fewer ads. Sign Up!