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- over 500,000 plumbing related posts
- The popular plumbing tips and advice forum and blog. Ask any toilet, sink, faucet, pump, water quality and plumbing related questions.
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Author:
cvcman
I had 2 plumbers look at changing my soil pipe, they bothe want to remove the ci and use pvc and chg it from 4" off the toilet to 3"...ANy reason to do or not to do that ?
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Author:
Paul48 (CT)
Did they notice there wasn't a vent stack?
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Author:
hj
quote; Did they notice there wasn't a vent stack?
Do you have a crystal ball or are you clairvoyant, because I have NOT seen anything which would indicate whether the is, or is not, a vent stack. They want to do it that way because it is the only way they know how to do it.
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Author:
Paul48 (CT)
I'm clairvoyant, I don't need a crystal ball.
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Author:
Paul48 (CT)
Wait a minute...something else is coming to me. All the houses in his neighborhood are built that way!
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Author:
Paul48 (CT)
I don't know what's more tiring, using my powers, or the constant BS.
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Author:
waukeshaplumbing (WI)
a toilet doesnt need 4"
when i repipe older houses with 4" drains i always repipe to 3"...4" fittings cost a lot more and i only stock a few of each on my truck....there's no reason for it and they want to give you a good price...4" is over kill if i understand things correctly
the trap in your toilet is only 1 1/2 to 1 3/4"
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Author:
cvcman
Now im not sure where you came up with no vent stack but I do and so does every house in my neighborhood have one...I do however only have 1 vent stack as do all the houses in my neighborhood and it comes off my bath sink 2" drain, and BOTH licensed plumbers looked at the whole plumbing system and see NO problems. But im sure they are probably not as professional as yourself and they dont have a crystal ball either.
Hj, the one guy said he could IF I wanted replace the ci 90 with another but he prefered to do it with pvc and at that time he would tie my bath,sinks, and washer drains in different...but again would changing it from 4" to 3" be an issue either good or bad ?
Edited 1 times.
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Author:
cvcman
wauke, thx for the info, pretty much what they both said. I just assumed that IF I keep my exsisting ( old) toilet 4" would be better...
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Author:
joe plumber (NE)
Makes no difference ,either way you can use your old toilet
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Author:
Paul48 (CT)
cvcman....that wasn't directed at you.Your house is not vented like most homes.Anything that will go down a toilet will go through 3" pvc. There was a long discussion about the venting for your house, and the bottom line was "it works".My point is, will it work as well with 3"? Basically for the same reason you can have a toilet farther from the stack when 4" is used.
Edited 1 times.
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Author:
cvcman
Paul, ok thx
I realize newer homes are vented different than mine but you are correct, mine works..There are older 1800 houses in the village that have no vent, at least not visable...so I guess 3" is as good as 4", thx again guys 
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Author:
hj
He is in the middle of a "section" so he does not have neighbor's according to my crystal ball, and it has just had its 10,000 prediction check up.
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Author:
hj
Neutral. Even when I use 3" I connect the toilets to a 4x3 closet bend. It makes the final connection a lot easier.
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Author:
cvcman
so if I understand this I MAY be better off staying with 4" seeing as i only have the one vent stack and its only 1-1/2" ?? Or am i misunderstanding
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Author:
waukeshaplumbing (WI)
i have had very old toilets that wouldnt fit into a 3" collar (once)
odds are it will fit...they sell 3x4 90's that are legal also
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Author:
cvcman
really ! I thought the flange was the same size just a smaller hole ??? My toilet is a Mansfiels but the tnk is date stamped 1957
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Author:
hj
That has absolutely nothing to do with the pipe size. HOW the piping is installed determines how many vents you need, NOT the pipe size. He must mean the outlet was too big for the opening in the 3" collar.
Edited 1 times.
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Author:
cvcman
hj , ?????
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Author:
joe plumber (NE)
The outlet of the stool cvcman
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Author:
hj
What I mean is that the size of the pipe has little, if anything, to do with the number of vents or how they are connnected. Therefore, you install the size of pipe comensurate with the fixtures being connected to it, THEN you work out the required venting.
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Author:
hj
quote; You guys have to admit it , my posts draw the most attention
But not for the right reasons. You do NOT get it, do you. The 4" pipe was NOT used because of any venting issues. At one time that was the only size we used. I just have a problem with going from 4" at the toilet, which is what I would use, to a short 3" section, and then back to 4". BUT, is a personal decision, not a code issue. There is such a small cost difference, if any because of the required reducers, that I would not even consider using 3".
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Author:
hj
quote; Thx for your help, I hope you live forever
My wife says I can't retire because she could not stand having me around 24/7. What would she do it I was around "forever"?
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