Often asked: Toilet Flange In Concrete?

Does a toilet flange need to be flush with the floor?

5 Answers. The toilet flange needs to be on top of the finished floor. Meaning the bottom edge of the flange needs to be on the same plane as the toilet. So if your toilet sits on the tile, the flange needs to be on top of the tile too.

Does toilet flange go inside or outside pipe?

This toilet flange is designed to glue on the inside of the pipe or expand inside the pipe. Leave the old toilet flange right in place and glue on the new one at the right elevation for the floor, if it’s plastic. The flange should be sitting with the bottom edge flush with the top of the floor.

Does a toilet flange need to be glued?

This toilet flange is designed to glue on the inside of the pipe or expand inside the pipe. The bottom of the flange needs to be sitting flush with (or not more than 1/8″ above) the finished floor or else the toilet will rock. The flange should be fastened to the floor. Dry fit the toilet to make sure it doesn’t rock.

How high should a toilet flange be?

With the toilet removed, you can see the toilet flange and measure its height above the floor. Optimum flange height to aim for is 1/4 inch above the finished floor. This typically allows for almost any type of wax ring to be used and still ensure a good seal.

When should I replace toilet flange?

Do you have to replace the flange when you get a new toilet or can you just replace the wax ring? No, simply replace wax ring or seal (rubber gasket seals are becoming more popular). However if you notice damage to the floor, or flange, you may want to replace them depending on the severity of damage.

What if toilet flange is not level?

The toilet should sit on the floor over the flange and still have a little room above the flange for wax to make the seal – it must be shimmed to sit flat, if it rocks (before you install the wax ring). If the toilet sits ON the flange, you won’t be able to keep it sealed properly.

Can you use 2 wax rings when installing a toilet?

You can certainly install a toilet with multiple wax rings, in fact sometimes it is necessary to make sure you don’t have a leak. The most common case is when a homeowner will install a tile floor (or really any thick floor).

Can plunging a toilet damage the wax ring?

In an effort to dislodge whatever is clogging the toilet, many homeowners get overzealous and thrust too hard downward into the toilet with their plunger. A hard thrust downward can break the wax seal between the toilet and the floor, causing a leak. And a really hard thrust could even crack the bowl.

How do I know what size toilet flange I need?

One common standard toilet flange size is 4×3, and this is the measurement you will find beside most flanges available at your hardware or plumbing stores. The top side of the flange, which connects to the toilet, is 4 inches in diameter, while the bottom diameter of the pipe is 3 inches.

Can I use a 3 inch toilet flange?

The 3–Inch Flanges



Many flanges are simply 3 inches in diameter, which means the top and bottom are each 3 inches wide. These flanges must install on a 3–inch-diameter schedule 40 drain pipe or directly to a 3–inch closet bend. When installing this type of flange, make sure your piping is sized properly.

Can toilet be installed without flange?

2 Answers. The flange and accompanying bolts hold the toilet firmly to the floor and keeps the seal between the toilet and the floor. Without the flange or if it is broken, he would have to attach the toilet to the subfloor with wood screws, and if the floor is rotting out, those won’t last long.