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Old 02-21-2013, 09:30 PM   #31
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Venting


There are multiple reasons for the size of a vent but weather a toilet is affected by a larger or smaller vent is not the case.

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Old 02-21-2013, 09:38 PM   #32
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Venting


So you firmly disagree with that ASTM stuff up above. Thanks
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Old 02-21-2013, 09:46 PM   #33
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Can having an oversize vent effect the way a low flow toilet flushes? One story condo built in 1955 in North Carolina. If this is the case can I try closing off half or a third or the vent on the roof to see if it makes the toilets flush better.

I replaced two toilets that are back to back but they never flushed right. The association said it was problem with my toilets I bought but how can two toilets be bad at the same time,,,, I think it might be the venting.

this is what you asked and venting may be an issue but not because the vents are too big.

why toilets flush bad ? there could be a bunch of reasons.
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Old 02-21-2013, 10:01 PM   #34
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Venting


What other possible venting reasons could there be? This is the second time I am replacing the toilets in 4 years and they never work right.

The bucket of water trick is great! Never saw a plumber do that guess because they wouldn't make as much money if they didn't take everything apart run up on the roof and down to the basement to check for a clog when all they have to do is pour a bucket of water in the bowl.
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Old 02-21-2013, 10:14 PM   #35
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1 brand of toilet
2 style, one piece or two piece,
3 place purchased at, plumbing supply house or Homedepot type store
4 water level in tank
5 toilets installed correctly/ level, flange. wax,

without me personally looking and troubleshooting them it hard to say
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Old 02-21-2013, 10:31 PM   #36
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Somewhere in the thread above there was a hint to an astm specification for venting but I could not fully understand what they wrote, sounded like 3" was too big.
This thread is all over the place....
Your plumbing stack is a typical application. I think you can rule out a vent issue
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Old 02-22-2013, 07:24 AM   #37
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Could these narrow vents be the likely cause of continuous plunging requirements on the other 2 toilets ? Is the venting more significant since I have upgraded to low flush?
I suspect the problem with the two toilets is because they ARE vented and should not be. As described above, venting prevents water from being sucked out of the p-traps. Well, a toilet is basically a large p-trap that's SUPPOSED to be sucked out. Venting it makes it suck less.

I have two low-flush toilets in my house. Both are about 15 feet from the main stack and neither is separately vented. Both work just fine.

I should point out that my house was plumbed per IRC 2003. The UPC, as I understand it, addresses venting very differently. So you may get some input that is contradictory to mine.
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Old 02-22-2013, 09:27 PM   #38
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Venting


You can not tie in a vent to the stack if there is other fixture draining into the stack above where you want to connect vent so be safe and bring vents to highest point of stack above where the last drain connection is probably easier in attic. A wet vent is a drain that also serves as a vent on the same floor level hope you understand you also cannot wet vent thru a kitchen sink. Nestor what part of country do you live in where no vent required for toilet? In Ma everything has to be vented and an island sink can have a bow vent those automatic vents only if plumbing inspector allows it
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Old 02-22-2013, 09:36 PM   #39
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What the f--k are you talking about venting a toilet makes it flush poorly are you insane it's the pipe after the toilet that you are venting your codes in wherever your from are a joke you should learn plumbing theory before you say stupid things
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Old 02-23-2013, 07:57 AM   #40
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What the f--k are you talking about venting a toilet makes it flush poorly are you insane it's the pipe after the toilet that you are venting your codes in wherever your from are a joke you should learn plumbing theory before you say stupid things
Its OK Joe calm down calm down Joe,,,,, remember we need folf like that so we can go back and fix it right.. for a reasonable charge of course
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Old 02-23-2013, 10:02 AM   #41
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What the f--k are you talking about venting a toilet makes it flush poorly are you insane it's the pipe after the toilet that you are venting your codes in wherever your from are a joke you should learn plumbing theory before you say stupid things
Struck a nerve, did I? Far be it from me to argue with your Exalted Eminence of Plumbingdom, but I can't help what the code is where I live (Eastern WV). All I know is that my house is plumbed in accordance with it, passed inspection, and everything has worked fine for almost five years now.

Have you ever even read the IRC section on plumbing? It is quite different from the UPC, especially regarding venting.

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Old 02-23-2013, 10:37 PM   #42
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Originally Posted by md2lgyk View Post
I suspect the problem with the two toilets is because they ARE vented and should not be. As described above, venting prevents water from being sucked out of the p-traps. Well, a toilet is basically a large p-trap that's SUPPOSED to be sucked out. Venting it makes it suck less.

I have two low-flush toilets in my house. Both are about 15 feet from the main stack and neither is separately vented. Both work just fine.

I should point out that my house was plumbed per IRC 2003. The UPC, as I understand it, addresses venting very differently. So you may get some input that is contradictory to mine.
P3101.2.1 Venting required. Every trap and trapped fixture shall be vented in accordance with one of the venting methods specified in this chapter.

This the IRC...what you read and how you interpret are two different things. a inexperienced person usually interprets incorrectly.

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