toilet flange bolts
Sarah Martinez
Updated on May 17, 2026
Does a toilet flange need to be screwed or bolted to the floor? Yes, you have to screw or bolt the toilet flange to the floor. If you do not, you risk not securing the toilet enough to prevent rocking that may damage the wax seal, the drainage pipe, or the floor.
Do toilets come with flange bolts?
When you purchase a new toilet, it should come with most of the parts that you’ll need. Check the box and make sure it includes brass closet bolts (to connect the toilet to the flange), and a gasket for connecting the tank to the base, a wax ring, a fill valve, flush valve and flapper.
How do you bolt down a toilet flange?
Replace the Toilet
Place the toilet bowl atop the new flange, aligning the bolt holes in the base of the bowl with the flange bolts. Lower the bowl down and apply pressure to set the seal. Replace the washers and nuts on each toilet bowl bolt and evenly tighten the nuts onto the bolts.
What size threads are toilet bolts?
A set of replacement toilet caps typically includes two different sets of threaded adapters: 1/4 inch and 5/16 inch. The 1/4-inch size is the more standard.
What size socket are toilet bolts?
Dual Socket Wrench for Toilet Installation, 9/16″ x 1/2″
Does toilet flange go on top of tile or flush?
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. The spacing of the toilet exit “horn” and sealing surface is designed for this height.
Should the toilet flange be flush with tile?
For a correct installation, you should always place the toilet flange on top of the tile. The flange’s optimum height is about ¼ inches on top of the finished floor. Installing the flange on the subfloor or flush with the tile may result in incorrect sealing and lead to a wobbly and leaky toilet.
Why does my toilet rock when I sit?
Toilets usually rock because they are not resting flush against the floor. Underneath the toilet base is a round toilet flange that connects the toilet to the drain pipe. If the flange is a little higher than the surrounding flooring, the toilet becomes raised slightly in the center, allowing it to rock to either side.
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.
How do you put caps on a toilet bolt?
The washers are supplied with the toilet bolts. Screw one of the nuts that are provided onto each bolt and tighten it with a wrench. Cut the bolt with a hacksaw or, if it has an indentation along the threads, break it with pliers. Set the cap on the base and push down until it snaps and locks.
Are toilet bolts universal?
Are Toilet Tank Bolts Sizes Standard? Toilet tank bolts help to seal your toilet tank such that it does not leak. They are durable and often in the same sizes and lengths. More often, toilet tank bolts are standard and will fit most types of toilet tanks.
What screws do you use for a toilet flange?
Use Tapcon anchors or a similar type of masonry/concrete screw to fasten the toilet flange to the concrete slab. If using a plastic flange ring, be careful not to crack the ring by screwing the anchors in too far.
What size anchors for toilet flange?
1 1/2 inch screws or longer is usually a safer bet if you are screwing into thicker boards. If the board is more shallow, then 1-inch screws will probably do the job for you.
How far apart are toilet flange bolts?
Standard Fixtures Bolt holes must be between 5-1/4” and 8” apart. You will also need at least 3/4” clearance from the center of the bolt holes to the back of the toilet tank.