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Old 10-14-2011, 11:29 AM   #1
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Toilet install questions


Hey all,
I've just replaced the floor in my bathroom, new 3/4 plywood is down, with tile going in on top.

I had had cast iron pipe running up to the old toilet, which I cut off a couple feet below the floor in anticipation of installing a new section of PVC pipe up to the new closet flange.

I've never actually installed a closet flange before and I'm not sure if it's supposed to be flush with the new finished floor height?, what kind of flange to use? what size hole I need to cut in the floor? and if the actual flange needs to go in after my tile guy finishes??

Thanks in advance for any help. I'm quite handy with the rest of this stuff, just these toilet flanges have always been a little bit of a mystery to me Sam
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Old 10-14-2011, 06:04 PM   #2
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Toilet install questions


Toilet flange is set on top of the finished floor---that's code----However, I prefer to set the flange on top of the backer board and tile around the flange---there are times that a toilet will hit the flange ,when it's on top of the tile--

I've never had an inspector call foul on that method ---If you look at recent plumbing posts you will see how common it is for flanges to cause a rocking toilet when set on top of the finished floor.

Use the PVC flange with the stainless steel ring----Mike----
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Old 10-14-2011, 06:17 PM   #3
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Toilet install questions


I must of been lucky then. Had tile installer tile around hole in subfloor for closet flange. After he was done I installed a new vertical 3" PVC and set and secured the flange on the finished tile floor.

Toilet went back and is probably the most sturdy install of a toilet I've done as a DIYer
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Old 10-14-2011, 06:32 PM   #4
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Toilet install questions


I was wrong. I ended up going with a long sweep street 90(took me awhile to find a plumbing house that carried this) and installed the flange into that.

Attached are a few pics.

My install was a 1st floor bath where the basement is unfinished.

A few of the pics show a regular 3" 90 not the street 90 I went with.
Attached Thumbnails
Toilet install questions-100_6556.jpg   Toilet install questions-100_6557.jpg   Toilet install questions-100_6558.jpg   Toilet install questions-100_6559.jpg   Toilet install questions-100_6567.jpg  

Toilet install questions-100_6564.jpg  
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Old 10-14-2011, 06:44 PM   #5
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Toilet install questions


That looks like a nice clean installation----Most times the flange on the finished floor works just fine--

However in my experience there are some toilets--Italian for instance--that just miss---

Have that happen to you a couple of times and you will want that flange just a bit lower--Mike--
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Old 10-14-2011, 06:55 PM   #6
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Toilet install questions


Quote:
Originally Posted by oh'mike View Post
That looks like a nice clean installation
@ Oh'mike-----Thanks.

I was happy there was easy access from below. That helps alot for a DIYer. After seating the toilet which went "good" I figured putting the new 1/4 turn compression shut off on for the supply line would be 123. Guess since the flange install went w/out kinks the damn 1/4 turn would not stop leaking. Guess the plumbing gods werent gonna go down w/out a fight.
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Old 10-14-2011, 07:17 PM   #7
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Toilet install questions


A little secret about shut off valves----

Some are deep throats---more pipe sticking out past the brass compression ring than standard--

If you try to use the old nut and brass ring --and the old one was a 'deep throat' and the new one is not--it will leak---cut or file 1/8" off the pipe and the standard valve will stop leaking.

I have a tiny 'Imp' cutter--the Imperial Bantam---that is small enough to cut the tip of the pipe off.
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Old 10-21-2011, 05:49 PM   #8
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Toilet install questions


Thanks oh'mike...so I guess it's just a matter of cutting my PVC to the right height for the male flange??
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Old 10-21-2011, 06:05 PM   #9
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Toilet install questions


Yep--and make sure you use a flange that goes on the outside of the pipe---

Some toilets don't sit properly on the 3" flange that goes inside the pipe.---Mike---
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Old 10-21-2011, 06:30 PM   #10
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Toilet install questions


Hmmm...now you've got me confused..pics I was just looking at showed (I thought) male flange that would slip into the "bell" female end of the PVC. I was assuming I would use female end for the flange. Not a big deal, does the female flange seal onto the pipe with just PVC cement???....sorry for so many questions, but I sure appreciate the advice.
Sam
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Old 10-21-2011, 06:35 PM   #11
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I didn't mean to confuse you---if you are going directly into a fitting you are fine----

Sometimes a short section of pipe is used in the 90* then my advice stands--But if the flange is going into the 90* then all is good.

I'm hungry and I don't think clearly when the stomach is grumbling.
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Old 10-21-2011, 06:46 PM   #12
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Sweeet. Thanks again for the help. Go get dinner!!
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Old 03-30-2012, 11:37 AM   #13
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Toilet install questions


I suggest Johnny Shims to protect the toilet and finished tile floor. They tend to stay in place better than those squishy little square shims.

http://ezshim.com/products/johnnyshi...-a-toilet.html
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