Measure before you shop
Measure from the wall behind the toilet to the center of the floor bolts. Most toilets are built for a 12 inch rough-in, but older homes sometimes have 10 or 14 inch spacing. A toilet made for the wrong measurement will not sit flush against the wall.
Also check the shape of the bowl. Round bowls take less room than elongated ones, and the difference can be an inch or two. Measure from the same bolts to the front of the old bowl, then compare with the box dimensions.
Finally, decide on height. Taller bowls are easier on knees, but they may look out of place beside an older vanity. Sit on one in the store if you can.
Common setup problems and what they mean
| What you find | What it means | What to do |
|---|---|---|
| Bolts will not turn | Rust has fused the nuts | Cut the bolts with a hacksaw blade |
| Flange sits below the floor | New flooring was laid on top | Add a flange spacer or extender |
| Flange is cracked or rusted | Bolts cannot hold the bowl | Repair ring or replace the flange |
| Soft or dark subfloor | A slow leak has rotted the wood | Stop and call a plumber |
| Toilet rocks after tightening | Uneven floor or low flange | Shim, then caulk the base |
Any row ending in stop and call is a signal to pause. Setting a new toilet over rotten wood only hides the problem.
Removing the old toilet
Close the supply valve behind the toilet and flush until the tank empties. Hold the handle down to get the last of the water out. Then use a sponge to clear what remains in the tank and the bowl.
Disconnect the supply line, remove the nuts on the closet bolts, and rock the toilet gently to break the wax seal. Lift straight up with a helper if the bowl is heavy, then set it on cardboard or an old towel.
Stuff a rag in the open drain pipe right away. Sewer gas is unpleasant and unhealthy, and dropped tools or old wax can fall down the pipe.
Setting the new toilet
Work in this order and the new bowl should seat without a wobble.
- 1
Clean the flange
Scrape off the old wax with a putty knife and wipe the ring dry. Check for cracks, rust, and a flange height that sits level with or slightly above the finished floor.
- 2
Place the new bolts and wax ring
Slide new closet bolts into the flange slots. Set the wax ring on the flange or the bowl horn, but never both.
- 3
Lower the bowl straight down
Line up the bolts with the holes and press the bowl down firmly. Do not twist it back and forth, which breaks the wax seal.
- 4
Tighten in small turns
Alternate the nuts, a quarter turn at a time. Overtightening cracks the porcelain, which is a costly mistake.
- 5
Mount the tank, connect water, and test
Bolt the tank to the bowl, attach the supply line, and open the valve slowly. Flush several times and check the base and connections for drips.
Flange damaged or bowl will not seat?
Call (440) 468-0237 and tell us what you found under the old toilet. A plumber can usually say whether it is a repair ring or a bigger fix.
Permits, water, and state code for a Solon bathroom
Solon's Required Residential Permits Guide lists new plumbing installations, extending or running a new plumbing line, and replacing a water heater as permit items. It does not require a permit for replacing fixtures. A like-for-like toilet swap falls on the fixture side.
Moving the toilet to a new spot, tapping into a new drain, or running a new supply line is a different job. Call the Solon Building Department before you start. The city has adopted the Ohio Plumbing Code, which applies to one-, two-, and three-family homes.
Cleveland Water states that Solon's supply measures 7 grains per gallon, or 120 mg/L. Mineral scale can crust the fill valve and the supply connection over time. Rinse the new valve seat whenever you service it.
When a plumber is the better choice
If the flange is broken, the floor is soft, or the drain pipe sits at an odd angle, a repair stops being a swap. These jobs involve cutting into floors and sometimes the drain line itself. Mistakes can leak into the ceiling below.
Weight is a real factor too. A one-piece toilet can weigh around 100 pounds. If you cannot lift it safely, do not try.
For a stubborn running or leaking toilet, toilet repair is a better starting point than a new bowl. For a new bathroom or a moved fixture, plumbing installation covers the supply and drain work.
What changes the cost of a toilet install
The toilet itself is the biggest line item. Basic two-piece bowls cost far less than comfort-height or one-piece designs. The plumber's labor depends on how easily the old toilet comes out and what shape the flange is in.
Flange repair, a new shutoff valve, new supply lines, and subfloor patching all add cost. Haul-away of the old toilet is another small item. Ask for these on the quote so nothing surprises you.
Finishing touches that prevent callbacks
Caulk around the base after the toilet is tight, but leave a small gap at the back so a hidden leak has somewhere to show itself. Wipe away any extra caulk with a damp cloth.
Check the fill level and the flush after a day. A fill valve that hisses, or a flapper that lets water trickle into the bowl, is much easier to adjust now than after a month of wasted water.
If you live near Twinsburg or Bedford Heights, we serve both: see Twinsburg or Bedford Heights for coverage details.
Toilet install questions
A prepared homeowner can finish in two to three hours. A plumber with the tools often does it faster. Extra time goes to flange repair or stubborn bolts.
Yes. A used ring is flattened and will not seal properly. Always use a fresh wax ring or a wax-free seal made for your flange height.
The floor may be uneven, or the flange may sit too low. Plastic shims under the base fix a small rock. A larger rock means the flange needs attention.
The city's Required Residential Permits Guide says replacing fixtures does not need a plumbing permit. Relocating the toilet or running new plumbing does. Call the Solon Building Department to confirm for your project.
Yes, but the flange must sit on or just above the finished floor. Tile that raises the floor can leave the flange too low. A flange extender usually solves it.
Shut the supply and lift the bowl. Check the wax ring seating and the flange height. A leak that returns after reseating points to a damaged flange or floor.
Sources and standards behind this page
Local facts and rules on this page come from these public sources. Check the current version before relying on a permit or code detail.