Porcelain lasts a very long time. The things that wear out are the rubber, plastic and metal parts: flappers, fill valves, gaskets, bolts and the seal underneath. Replacing one of those is normally the right call, even on an older toilet, as long as the bowl and tank are sound and the toilet flushes well.

The question changes when the problem is the toilet itself. A crack, a design that clogs under normal use, or a tank full of failing parts in a model that is hard to find parts for can make a new toilet the more sensible spend over time.

Repair or replace

Repair usually makes sense when

  • One part has failed, such as a flapper or fill valve
  • The leak is at a gasket, bolt or supply line
  • The seal under the toilet needs replacing
  • The tank and bowl are free of cracks
  • The toilet has generally flushed well

Replacement is worth discussing when

  • The tank or bowl is cracked
  • It clogs often even with careful use and a clear drain
  • Several parts are failing at once
  • Replacement parts are hard to find for the model
  • You want a different height, shape or flush type

Working through the decision

  • IfA plumber finds a hairline crack in the tank or bowlThenPlan on replacement; patches on porcelain rarely hold.
  • IfThe toilet clogs often but the drain line has been checked and is clearThenThe toilet's trap or flush design may be the issue, and replacement is reasonable.
  • IfThe toilet has to be pulled anyway to fix the seal or flangeThenIt is a natural moment to ask whether replacing it would be the better value.
  • IfOnly the flapper or fill valve is wornThenRepair it; there is rarely a reason to replace a sound toilet for a tank part.

Things to look at before deciding

  • Any cracks, including fine lines in the tank or near the bolts at the base.
  • How often the toilet has needed plunging over the past year.
  • Whether parts for the model are still easy to find.
  • The condition of the floor around the base.
  • Whether the shutoff valve and supply line also need replacing.
  • Whether the bathroom is part of a planned remodel that could change the toilet anyway.

Questions to ask a plumber

  1. What exactly has failed, and can it be repaired reliably?
  2. If you recommend replacement, what is the reason?
  3. Would the new toilet fit the existing rough-in and flange?
  4. Do you supply the toilet, or should I buy it, and how does that affect the price?
  5. Can I have both options priced in writing?

Common questions

Is an old toilet worth fixing?

If the porcelain is sound and it flushes well, usually yes. Age alone is not a reason to replace a toilet.

Will a new toilet stop repeat clogs?

Only if the toilet was the cause. If the clogs come from the drain or sewer lateral, a new toilet will clog too.

Should I replace the toilet when I replace the flooring?

The toilet has to come up anyway, so it is a good time to decide. Either way, a new seal is installed when it goes back down.

General information for Fullerton, not a quote or professional advice. In an emergency, call 911.