How do I know if my toilet wax ring is bad?

The classic sign is water pooling on the floor around the base of the toilet, especially after a flush, along with a possible sewer smell. A rocking or loose toilet often points to a failing wax seal because the movement breaks the ring. Before blaming the wax ring, rule out condensation on the tank and a leaking tank-to-bowl connection or supply line, which drip from higher up. If the water clearly appears at the base and the toilet has any wobble, the wax ring is the most likely culprit.

Do you need a new wax ring every time you remove a toilet?

Yes — always install a fresh wax ring whenever you pull a toilet, even if you only lifted it for a moment. A wax ring compresses to form its seal on the first install and cannot be reused; once disturbed, it will not re-seal reliably and you will be chasing a leak. Wax rings cost only a few dollars, so there is no reason to gamble. Keep a spare on hand whenever you do any job that involves lifting the toilet, such as a flooring project or a flange repair.

What type of wax ring should I buy?

For most installs a standard wax ring works, and a wax ring with a plastic funnel or horn is a good default because the horn helps direct waste into the drain and improves the seal, particularly when the flange sits at or slightly below floor level. If your flange is recessed below the finished floor — common after new tile or vinyl was added — use an extra-thick wax ring or stack a second plain ring, rather than stretching one ring across the gap, which is the usual cause of a repeat leak.

Can I use a rubber or foam gasket instead of wax?

Yes — waxless rubber or foam toilet seals are a popular alternative and have a real advantage: they can be repositioned and reused, so you do not get the one-attempt pressure of a wax ring. They seal well and resist the mess of wax. Many homeowners prefer them now. Wax remains the traditional, cheapest and time-proven choice and seals excellently when set correctly. Either is acceptable; the waxless type is more forgiving if you are nervous about getting the toilet down in a single try.

Why does my toilet still leak at the base after a new wax ring?

Usually the flange sat too low for the ring to bridge, the toilet was rocked or lifted after the ring touched down (breaking the seal), or the closet bolts were not tightened evenly so the bowl does not compress the ring uniformly. Pull the toilet, check the flange height and add a thicker ring or a flange extender if it is recessed, set a fresh ring, lower the bowl straight down in one attempt, and tighten the bolts alternately until the toilet stops rocking — then shim rather than over-tighten.

How to Replace a Toilet Wax Ring: Stop the Base Leak

Written & researched by Priya Anand DIY & Tools Editor

Updated August 2026

Golden-hour view of a person's hands tightening a fitting under a kitchen sink with a wrench

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Replacing a toilet wax ring is a DIY job that stops a base leak for good — about 45 minutes, $5 for the ring, no permit and no plumber. Water pooling around the base after a flush is a failed wax seal. You shut off and drain the toilet, lift it off, scrape the old wax off the flange, set a fresh ring, and lower the bowl straight down in a single attempt. The whole trick is the one-attempt rule — once the wax touches, you cannot re-aim — and checking that the flange is not sitting too low.

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How To Replace A Wax Ring — Ace Hardware

Tools and materials

A new wax ring (buy a funnel/horn type, and keep a spare), or a waxless rubber seal.
New closet bolts, a putty knife or scraper, a sponge and bucket, and rags.
An adjustable wrench, a hacksaw for the bolts, plastic shims and bathroom silicone caulk.
Basic hand tools — see best plumbing tools; a helper for the lift.

Low-angle view of a person's hands tightening a fitting under a kitchen sink with a wrench, in soft overcast light

Step 1: Shut off, drain, and lift the toilet

Close the shutoff valve and flush, holding the handle to drain the tank. Sponge or vacuum the remaining water from the tank and bowl. Disconnect the supply line. Pop off the bolt caps at the base and remove the nuts (cut a spinning bolt with a hacksaw). Rock the toilet gently to break the old seal, then lift it straight up with a helper and lay it on its side on a towel. Stuff a rag in the drain to block sewer gas.

Step 2: Scrape the flange and old wax

Remove the rag briefly. Scrape all the old wax off both the flange and the underside of the toilet's outlet horn with a putty knife until both are clean. Inspect the flange — it should sit on top of the finished floor and be intact. If it is cracked, corroded, or recessed below the floor, fix that now (a repair flange, an extender ring, or a thicker wax ring) before proceeding, because a low or broken flange is the most common cause of a repeat leak.

Step 3: Set the new wax ring

Set new closet bolts into the flange slots pointing up, positioned evenly. Press the new wax ring onto the toilet's outlet horn (this lets you see the alignment) or onto the flange. Use a funnel/horn ring if the flange is at or below floor level. Remember: you get one attempt — once the wax touches down and compresses, lifting the toilet to re-aim ruins it and you start with a fresh ring.

Step 4: Reseat the toilet

Lift the bowl over the drain, line up both bolt holes with the closet bolts, and lower it straight down without twisting. Press down with your body weight and a slight rock to compress the wax evenly. Add washers and nuts and tighten them alternately, a little each side, until the toilet stops rocking — then stop, or you will crack the china. Shim any remaining wobble rather than over-tightening.

Overhead view of a person's hands tightening a fitting under a kitchen sink with a wrench, in warm evening lamplight

Step 5: Reconnect, test, and caulk

Reconnect the supply line, open the shutoff, and let the tank fill. Flush several times while watching the base for any water. Check again after a full day of use. Then caulk around the base with bathroom silicone, leaving a gap at the very back so any future leak shows itself rather than hiding under the toilet.

Common mistakes

Reusing the old wax ring — it will not re-seal; always fit a new one.
Re-aiming after the wax touches down, breaking the seal.
Ignoring a recessed flange and expecting one ring to bridge the gap.
Over-tightening the closet bolts and cracking the base.

When to call a plumber

Call a pro if the closet flange is broken or sits well below a raised floor and needs replacing, if the subfloor around the toilet feels soft from a long-standing leak (water damage repair comes first), or if the toilet has been leaking long enough to rot the flooring. Flange replacement and subfloor repair go beyond a wax-ring swap. There is no permit for replacing a wax ring itself.

How to Replace a Toilet Wax Ring