[325_man]

Hi all,

It is my understanding that toilet flange needs to be installed during the rough-in inspection. Do you know why?

Here is my issue. I plan to use tiles in my basement. Upon talking to several people, I learn that I should not mount the tiles directly on concrete because the tiles will come loose with moisture. There are several suggestion (e.g. moisture seal the concrete floor, put backer board under the tiles, etc.)

At this state, I have not make up my mind on the flooring so I am not sure how thick of flooring I will have. :icon_cheesygrin:

During the rough-in inspection, does the flange need to be glued and bolted down to the concrete?
Since I don't know how thick of flooring will be, I potentially will have to put spacers below the flange. I want the ability to adjust the flange height. Any suggestion on how I can go around this requirement?

Thanks!

 

[joecaption]

Need to start talking to someone that knows how to tile, not someone that knows someone that's done it or some DIY that did it wrong.
If a moisture issue is so bad in that basement your worryed about it, that needs to be addressed before any flooring goes in.
Laying tile directly over a slab (if it's in good shape and not full of cracks) is the best way to lay tile.
Tile board should never be laid over a slab!
Any place I've worked there going to want to see the plumbing in place but not back filled and covered up for a rough plumbing inspection in a basement.
Mount the flange so it's in direct contact with the slab and you'll be fine.
Then you tile up to the edge of the flange.

 

[TheEplumber]

The flange is usually installed prior to final rough inspection. I use the type with a temp (knock-out) cap. They make air or water testing easier. I also use a 1/2" plastic spacer under the flange and secure both with anchors to the floor. Using tile- this will give you a good finished flange height.
The inspector wants to see approved fittings installed- he cannot see the flange if you don't put it in.

 

[Ghostmaker]

My tile floor on concrete is now 10 years old. Haven't had one loosen yet.

 

[ben's plumbing]

we install flange on rough in ..as mentioned has a knock out cap used for testing.....if in concrete we test as an underground leaving pipes extend 36" above floor fill with water..after test drain and just leave 4" pipe sticking up where flange will be after finish floor in done ..tile, vinly ..we install flange..:yes:

 

[Javiles]

we usually stub up with a test cap for ground rough, i prefer to wait until the tile is down or what ever type of flooring is to be installed, then i install the flange been doing it this way 40 years, unless it was cast iron back in the day. when gluing plastic pipe was only a pipe dream.