A wax ring replacement takes two to three hours and costs $15 to $30 in materials
A wax ring is a rubber-and-wax seal that sits between the base of your toilet and the flange (the pipe fitting bolted to your floor). When it hardens or compresses over years of use, water leaks underneath the toilet and into the subfloor. Replacing it means removing the toilet, scraping off the old ring, setting a new one, and bolting the toilet back down. You do not need a plumber for this job if you are comfortable with basic tools and heavy lifting.
The work itself is straightforward: turn off the water, empty the bowl, unbolt the toilet, lift it away, clean the flange, press a new wax ring onto it, and reset the toilet. The hardest part is usually scraping away old wax without damaging the flange or the toilet's horn (the outlet on its underside). Most homeowners finish in an afternoon. You will need a wrench, a putty knife, a new wax ring, and either a helper or a dolly to move the toilet safely.
Key Takeaways
- Turn off the water supply at the shutoff valve under the tank, flush to empty the bowl, and disconnect the water line before unbolting the toilet.
- Remove the two bolts holding the toilet to the flange, then rock the toilet gently side to side to break the wax seal before lifting it straight up.
- Scrape the old wax ring and debris from the flange with a putty knife, then wipe the flange clean with a rag so the new ring seats flat.
- Press a new wax ring onto the toilet's horn (the outlet on the underside), position the toilet over the flange bolts, and lower it straight down until it sits level on the floor.
- Tighten the bolts evenly in a cross pattern, then reconnect the water line and test for leaks under the toilet base within the first hour.
What you need before you start
Gather these items before you turn off the water. A standard wax ring costs $15 to $25 at any hardware store and comes as a rubber ring with wax molded around it. Some versions have a plastic horn (a sleeve that fits into the flange opening) and cost a few dollars more; these are easier to work with if your flange is recessed or damaged. Buy one extra in case you damage the first one while scraping.
You will need an adjustable wrench or socket wrench to remove the two bolts at the base of the toilet. A putty knife or old chisel works for scraping wax. Have rags or paper towels on hand to wipe the flange clean. If the toilet is heavy or you have a bad back, rent a furniture dolly (about $10 per day) or ask a friend to help you lift. A bucket catches water remaining in the bowl and tank.
Turning off the water and emptying the toilet
Locate the shutoff valve on the water line under the tank, usually on the left side. Turn it clockwise until it stops. Flush the toilet once to empty the bowl and tank. If water continues to run, the valve may be stuck or broken; turn it off at the main water shutoff for your house instead. Use a bucket or towels to catch any remaining water in the bowl.
Disconnect the water line from the bottom of the tank by turning the nut counterclockwise by hand or with a wrench. Have a bucket ready—there will be a small amount of water in the line. If the nut is stuck, spray it with penetrating oil and wait 10 minutes before trying again. Do not force it; a cracked fitting is harder to fix than a stuck bolt.
Removing the toilet from the flange
Look at the base of the toilet where it meets the floor. You will see two bolts, one on each side, usually covered by plastic caps. Pry off the caps with a flathead screwdriver. Use your wrench to loosen and remove both bolts. They should come off by hand once the wrench has broken them free. If a bolt spins without loosening, the nut underneath may be loose; have your helper hold the nut with a second wrench while you turn the bolt.
Once both bolts are out, rock the toilet gently side to side to break the wax seal. Do not rock it hard—you are just loosening the seal, not breaking the toilet. After a few gentle rocks, grip the toilet bowl on both sides and lift straight up. The toilet is heavy (40 to 50 pounds), so use your legs, not your back. Set it on its side on a towel or cardboard to protect the finish. If you cannot lift it safely, use a dolly or ask your helper to lift one side while you lift the other.
Scraping and cleaning the flange
With the toilet removed, you can see the flange and the old wax ring around it. Use a putty knife to scrape away all the old wax and rubber. Work slowly and at a shallow angle to avoid gouging the flange itself. If the flange is cast iron, it can handle firm scraping; if it is plastic or PVC, be gentler. Scrape until you see bare flange with no wax residue.
Once the flange is scraped clean, wipe it with a dry rag to remove dust and small pieces of wax. The flange should be smooth and dry. If there is any standing water in the flange opening, use a rag to dry it. A clean, dry flange is essential—the new wax ring will not seal properly if the surface is wet or dirty. If the flange is cracked or the bolts are loose, tighten them now or replace the flange before setting the new ring.
Installing the new wax ring and resetting the toilet
Remove the new wax ring from its packaging. Press it firmly onto the horn of the toilet (the outlet on the underside of the bowl). Push it on evenly so it sits flush against the horn. If your wax ring has a plastic horn, insert that horn into the flange opening first, then lower the toilet onto it. If it is a standard wax ring without a horn, you will press it directly onto the toilet's horn.
Position the toilet over the flange so the two bolt holes line up. Lower the toilet straight down onto the wax ring. Do not twist or rock it side to side—let it settle under its own weight. The wax ring will compress and create a seal. Once the toilet is resting on the floor, insert the two bolts through the flange holes and hand-tighten the nuts underneath. Tighten them evenly in a cross pattern (one side, then the opposite side) so the toilet sits level. Do not over-tighten; you are aiming for snug, not crushed. Over-tightening can crack the toilet base.
Reconnecting water and checking for leaks
Reconnect the water line to the tank by turning the nut clockwise by hand, then tighten it with a wrench. Turn the shutoff valve counterclockwise to restore water pressure. Let the tank fill, then flush once to make sure water flows and the tank refills normally. Check under the toilet base and around the flange for any water dripping or pooling. If you see water, turn off the shutoff valve and let the floor dry for 30 minutes, then check again.
Small beads of water around the base are normal for the first few hours as the wax ring settles. If water is actively dripping or pooling after an hour, the ring may not be seated properly. In that case, turn off the water, empty the toilet again, and remove it to check whether the wax ring is centered on the flange or whether the flange itself is damaged. Once you confirm no leaks, you are done. The wax ring will cure fully over the next 24 hours.
Frequently Asked Questions
What if I crack the toilet while removing it?
Small cracks in the base or rim may not leak and can be sealed with epoxy putty or silicone caulk. Large cracks or cracks near the water line usually mean the toilet must be replaced. If you crack it during removal, stop and assess the damage before reinstalling. A cracked toilet will leak no matter how good your wax ring is.
Can I reuse the old wax ring?
No. A wax ring that has hardened or compressed enough to cause a leak will not reseal properly. Always use a new ring. Old wax is also difficult to remove completely, and leftover pieces can prevent the new ring from seating flat.
What if the flange is cracked or the bolts are loose?
A cracked flange or loose bolts will cause the new wax ring to fail. If the flange is plastic and cracked, you can buy a repair ring (a stainless steel ring that bolts over the damaged flange) for $20 to $40. If the bolts are loose, tighten them before installing the new ring. If the flange is severely damaged, it must be replaced—this is a bigger job that may require a plumber.
How long does a wax ring last?
A wax ring typically lasts 20 to 30 years. It fails sooner if the toilet rocks or shifts, if the flange is damaged, or if the house settles unevenly. If you notice water under the toilet, a failing wax ring is the most common cause.
Do I need a plumber for this job?
Most homeowners can do this job themselves if they are comfortable lifting a heavy toilet and using basic tools. A plumber will charge $150 to $300 for the same work. If you are unsure about lifting, have a bad back, or your flange is damaged, hiring a plumber is worth the cost.