Over 700,000 strictly plumbing related posts
Welcome to Plbg.com (also known as PlumbingForum.com) where plumbing advice, education, information, help and suggestions are provided by some of the most experienced plumbers and plumbing contractors anywhere who all wish to "give back" to society. Since 1996 we have been free without popup or other invasive ads and known to be the best online STRICTLY PLUMBING advice site. If you have questions about plumbing, toilets, sinks, faucets, drains, sewers, water filters, venting, water heating, showers, pumps, and other strictly PLUMBING related issues then you've come to the right place. Please refrain from asking or discussing legal questions, or pricing, or where to find and/or purchase products, or any business issues, or for contractor referrals, or any other questions or issues not specifically related to plumbing. Keep all posts positive and absolutely no advertising. Our site is completely free, without ads or pop-ups and we don't track you. We absolutely do not sell your personal information. We are made possible by:
Author:
bobby40 (FL)
Hello all. I have undertaken a difficult job (for me), replacing my homes entire cast iron dwv system with pvc. I am attempting to do this myself and at this point have the first bathroom roughed in. I am at the point of bring ready to back fill but want to have someone check my work before it gets buried. It is a horizontal wet vented system serving 2 lav sinks , 1 shower and 1 water closet. All horizontal pipe runs are at 1/4" per foot drop. The shower arm is in 2", the lavs//vent are in 3 and water closet is in 4".
My chief concerns are:
1. The shower trap arm measures 67" in developed length. I have seen codes that state 60"and 96" are maximum lengths. (different plumbing codes)
2. The shower tailpiece will probably end up at 20" in length (vertical) from the drain to the p trap weir. I believe this meets code but seems a bit long to me.
3. The shower trap arm has 2 horizontal 45 degree turns which should not be a problem but I would prefer not to have them in the pipe run.
Are any of these concerns valid?
Many thanks!
[i.postimg.cc]
Edited 1 times.
|
Post Reply
|
Author:
packy (MA)
what you describe meets my code. (MA)
a picture or a rough drawing would help enormously.
the fact that you have 20 inches of height for the piping helps alot.
l
hint... if you have a 2 foot level, tape a small 1/2 inch block onto one end. use this with the block on the downhill side of the pipes and if it reads level, you have a perfect 1/4 inch pitch.
|
Post Reply
|
Author:
packy (MA)
the shower trap needs a vent.
you can cut in a "Y" down where the copper tubing crosses the shower drain.
look the "Y" straight up and put a 45 in it to come to vertical. go up about a foot and put a long sweep 90 facing to a wall. if you can use that new 2" vent as a lav drain, you will have a true wet vent.
the toilet flushing by the shower drain is apt to suck the seal out of the trap.
|
Post Reply
|
Author:
bobby40 (FL)
I will see about placing a vent line on the shower arm. Do you see any issues with having those 45 bends? Seems like a snake should be able to make it past those pretty easy. Any concern with the tailpiece length? I think this may cause some noisy drain/dripping sounds after the shower is turned off, but I can live with that. Thanks for the advice.
|
Post Reply
|
Author:
sum (FL)
As Packy stated your shower is not vented and it needs to be.
It would help to see where your lav drain and toilet is so the pros can see how they are connected. A picture showing the walls where the lav is and the toilet in relation to the shower will be useful in determining that. is the lav the fixture that has the vent through the roof?
I wouldn't worry about the offset (two 45s) in terms of easy of snaking. If your main line is clogged you will not go through your shower drain. If the shower drain itself is clogged you will use a small snake to clear it and it will have a harder time passing through the p-trap's U-bend then the two 45s downstream of it.
|
Post Reply
|
Author:
bobby40 (FL)
I have added a vent to the shower as recommended here and removed those 45 bends while I was at it. Hopefully I have this correct now. Thanks for your help with this. Here is a drawing of the layout.
[i.postimg.cc]
Edited 1 times.
|
Post Reply
|
Please note:
- Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
- Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
- Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
- Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.
Search for plumbing parts on our sponsor's site:
Special thanks to our sponsor:
|