OnOtto
Menu

How do you replace a toilet wax ring?

Updated August 2026

60–90 minutes · Moderate DIY

← All how-to guides

A new wax ring is a $5 to $15 part and 60 to 90 minutes of work: unbolt the toilet, lift it off, scrape the flange clean, and set the bowl back down on fresh wax. Do it as soon as water seeps around the base, because a failed seal sends waste water under the flooring with every flush, and the subfloor repair that follows runs $500 to $1,500. The lift is the only real obstacle: a two-piece bowl weighs about 60 pounds and a one-piece unit 90 to 120.

What you need

Before you start: Treat the old wax, the trap water, and anything on the floor as contaminated: gloves on, and wash up afterward. Stuff a rag into the open flange the moment the bowl comes off, because that pipe is an open line to the sewer. Lift with a second person and with your legs; 60 to 120 pounds of porcelain that slips breaks a foot and shatters into edges sharper than glass. If the subfloor flexes under the flange, stop and get a pro before you bolt anything back down.

Steps

  1. Confirm the seal is the problem first. Dry the floor, tint the bowl water with dye, and flush. Dyed water at the base means the ring; clear water points at the supply line or the tank bolts.
  2. Close the supply stop, hold the flush lever down, then sponge the tank and the bowl dry into a bucket. Disconnect the supply line at the tank.
  3. Pop the caps off the base and remove the two closet nuts. Corroded bolts cut off in about a minute with a mini hacksaw blade.
  4. Slice the caulk bead at the base with a utility knife, then rock the bowl gently side to side until the old wax lets go.
  5. Lift straight up with a helper and set the toilet on cardboard or old towels. Do not rest it on the seat or the tank lid.
  6. Scrape every trace of old wax off the flange and off the horn on the underside of the bowl. Stuff a rag into the open drain while you work.
  7. Inspect the flange. It should sit level with or slightly above the finished floor and hold both bolts firmly. A cracked or sunken flange needs a $10 to $20 repair ring or a spacer before the toilet goes back.
  8. Slide new closet bolts into the flange slots pointing up, then press the new wax ring onto the horn of the bowl. Room-temperature wax compresses properly; wax straight out of a cold garage does not.
  9. Pull the rag out, lower the bowl straight down over both bolts in one motion, and sit on it to compress the wax fully. Never lift it back up to reposition, because a lifted ring is a used ring.
  10. Tighten the nuts alternately, a little at a time, until the bowl is snug and does not rock, shimming as needed. Reconnect the supply, flush three times, then caulk the base and leave a 2 inch gap at the rear as a leak tell.

Or hire it out

A plumber charges $150 to $300 to pull a toilet and reset it on a new ring, and $250 to $500 when the flange needs repair as well. The part itself is under $15.

Done. Now the part everyone skips: doing it again on schedule. Log it in OnOtto and the next reminder for wax ring replacements sets itself.

Log this task, get the next reminder

Frequently asked questions

How do I know it is the wax ring and not condensation?

Timing separates them. Water that shows up within a minute of a flush and stays gone in between is the seal. A puddle that appears on humid days, with the tank and bowl beaded in moisture, is condensation, and the answer there is an insulated tank liner or a mixing valve. Water behind the toilet rather than at the front of the base usually means the supply line or the angle stop. Left alone, a real seal leak keeps eating the subfloor: the cost of ignoring a leaking toilet wax ring.

Wax or one of the wax-free rubber seals?

Wax costs $5 to $15, seals beautifully against a flange at the right height, and gives you exactly one attempt to set the bowl. A rubber or foam seal costs $10 to $20, can be repositioned if the bowl lands crooked, and holds up better over a heated floor or where the flange sits low. Either way, flange height decides the outcome more than the material does: what a wax ring is.

The floor near the toilet feels soft. What does that mean?

The subfloor has been taking water long enough to rot, which takes months rather than days. A bowl that rocks and a spongy patch in front of it are the two classic signs. A new ring on top of soft plywood will fail again, since the flange has nothing solid to hold it. Budget $500 to $1,500 for subfloor and flange repair, more if tile has to come up. Catching it early is the whole point of the interval on how often to replace a toilet wax ring.

Related