Any plumbers out there?
A typical toilet install has the toilet drain down and back into the wall with a (sani?) Tee where the drain goes down and the vent goes up. Can you plumb a toilet where the Tee is upside down directly under the toilet where the waste runs in one direction some distance before it turns down and the vent runs the other direction some distance before it turns upwards? I would think so, but I have never seen it done and “testbooks” seem to always show the first description.
Yes the drain and vent must slope slightly through the roughly horizontal stretch I discribe.
Thanks to all the helpful friendlys.
Replies
Hey DoRight, I am curious to see what the plumbers here may say about this. I can't imagine it's acceptable because you are providing 2 roughly horizontal paths for the waste to travel instead of one vertical. I could see a clog on the vent side happening and being very difficult to deal with because it wouldn't see a lot of water to clear it out. This sounds like a tough set up to me. What is causing you to avoid the standard method?
I was under the impression that the tee goes IN the toilet.
The situation is ...
There is obviously a wall rising up behind teh toilet, but no wll directly below that wall. therefore, you could run teh ven t line back and up but the drain wold have to go elsewhere. And the distance from the tolilet until the drain can go vertically downward is greater than the 3 feet allowed until a vent is required. Make sense? YOu have to ahe a vent within 3 feet fo the trap.
I hear you as to teh problem of cleaning a clog even if the T is a sani (with sweep).
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WOW missed more letters than is even ususal for me!
sorry.
Getting the vent close enough.
Run the pipe (let's say 3" back from the toilet to the cleanout. Immediately behind the T for the toilet put a 3" x 2" sanitary T and a street 90 You could also use a 3" x 2" Y and a 45. As I said this T must be turned up no less than 45 degrees. Run the 2" pipe horizontally to where you want the vent. Then turn up for the vent. If you put the vent T straight up you can turn the 90 in any direction. Remember that there is a vent 90 that is smaller than a medium sweep 90. It can only be used in vents. See my other post.
Yes, with some caveats.
You can do this if on the vent end of the T you do not reduce the pipe size. Run the full size pipe back to where you want the vent to be. 1. At that spot use a sanitary T pointed up for the vent. Continue the horizontal run in the full pipe size and provide a clean out where you can. OR. 2. Where the vent turns up use a full size 90 turned up to a cleanout T in the wall and then reduce the pipe to vent size. Make sure your vent is close enough to the toilet. I don't remember the requirements for that off hand.
You cannot terminate a horizontal run of pipe in a reduced size although it can have branches in a reduced size. If you use a sanitary T for a vent in a horizontal run of pipe, it must be turned up no less than 45 degrees. Remember to keep 1/4" per foot fall for 3" pipe or 1/8" for 4" pipe.
I am not sure what current code is but my master bath has the shower at the end of a 3", a couple feet later a T for the 3" vent, then the toilet on a T a couple feet after that. It has been working fine since the Kenndey administration.
Inspectors interpretations always rule.
"If this job is to be inspected, don't do anything until you clear it with the inspector, who may not be willing to consider any option except his own interpretation of the code he works with."
You're dead right on with that one.
Makes sense that it should not matter if the vent is 7 or 9 feet down the line from the toilet. That would work for me, I just was pretty sure code required teh vent to be 6 feet or closer to toilet. I like that is on a 3 inch drain. hmm? I wonder if a 4 inch drain would be code compliant up to ten feet or so.
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Thanks.
not so fast?
I just looked at some notes I made some time ago. It says a vent within 10 feet on a 4 inch drain, BUT within 4 feet of a toilet.
Hmm?????