Repair or Replace a Toilet: How to Decide

A running toilet is a $20 part. A rocking one can be a subfloor. Here is how to tell which problem you have before you spend anything.

Most toilet problems are cheap. A few of them are not, and the difference is not how old the toilet is. It is where the water is going.

The short version. If the water is staying inside the toilet, it is almost always a repair. If the water is getting out of the toilet, at the base or into the floor, stop using it and get it looked at.

Problems that are a repair

These are parts, not fixtures. Replacing the whole toilet because of one of them is money thrown away.

• A tank that runs, or refills on its own. A worn flapper or a fill valve that is not shutting off. A fill or flush valve repair runs $175 to $350, and on a well it also stops your pump cycling for nothing.
• A handle that needs holding down. The flapper chain or the flush valve, both cheap.
• A slow fill. Usually the fill valve or a partly closed shutoff behind the toilet.
• Sweating in summer. Condensation on a cold tank in a humid bathroom. Annoying, not a fault.
• A loose seat or a dripping supply line. Ten minutes and a part.

Problems that usually mean replacement

• A crack in the tank or the bowl. A hairline crack does not stay hairline, and there is no repair for porcelain that holds up.
• Repeated clogs on ordinary use, with a clear line. Some early low flush toilets from the 1990s simply do not move waste. If the drain is proven clear and it still blocks, the toilet is the problem.
• A toilet that has been rebuilt twice already. At some point the parts cost more than the fixture, and a new toilet comes with a new seal, new bolts and a warranty.
• Anyone in the house is struggling to get up off it. Comfort height is a couple of inches taller and is worth doing before it becomes urgent rather than after.

The one that is neither, and matters most

A toilet that rocks when you sit down, or weeps at the base, is not really a toilet problem. It is a seal, a closet flange or a subfloor problem, and the toilet is just the thing sitting on top of it.

This is the symptom worth acting on quickly, especially on the Shore, because almost every house here sits over a crawlspace rather than a basement. Water that gets past a failed wax seal goes into the subfloor and then into the crawlspace, and nobody sees it until the floor around the toilet gives. Replacing a flange properly adds $150 to $450 to the job. Replacing a section of subfloor costs considerably more than that.

If the toilet rocks, put a hand on it, feel whether the floor moves with it, and get it looked at rather than shimming it.

What well water does to the parts inside

On town water, a flapper is a five year part. On the iron-heavy well water a lot of Shore houses run on, it is often a two or three year part, and so is the fill valve. Sediment scores the seat, the flapper stops seating, and the tank starts refilling on its own in the middle of the night.

That is not a reason to replace the toilet. It is a reason to expect the internals to be a maintenance item, and a reason to look at water treatment and filtration if it is happening everywhere in the house at once. The same sediment is working on your faucet cartridges and your water heater.

What it costs either way

A standard toilet replacement is $350 to $800 installed. A fill or flush valve repair is $175 to $350. A shutoff valve, which is the item most likely to turn a short job into a long one, is $120 to $250. The full fixture price ranges are here.

Bundling matters more than most people expect. If two toilets in the house are both due, doing them on one visit costs noticeably less per toilet than two separate trips, and out here a trip is a real part of the cost.

Businesses are a different calculation

A tank toilet in a restaurant restroom gets a decade of domestic use in a couple of years. Most commercial restrooms run flushometer valves instead, and those are rebuilt rather than replaced: a diaphragm and a handle kit brings one back rather than pulling the fixture. If you run a motel, a restaurant or a church hall, the cheaper pattern is almost always to batch the work between seasons rather than react to each one. That is on our toilet repair and installation page, along with the commercial detail.

Still not sure

Send a photo of the toilet and the shutoff behind it and we can usually tell you which of these you have before we arrive. See toilet repair, toilet installation and replacement, or the repair versus replace comparison. If the problem is really the drain rather than the fixture, start with a clogged toilet.

How long should a toilet last?

The bowl and the tank can last decades. The working parts inside will not. Expect to replace a fill valve or a flapper every few years, sooner on hard well water.

Is it worth repairing a toilet that keeps clogging?

If the bowl clears and then blocks again within weeks, the problem is usually the line rather than the toilet, and replacing the toilet will not fix it. If it blocks on ordinary use and the line is clear, a low flush design from the 1990s is often the culprit and replacement is the fix.

How much does a toilet replacement cost?

A standard replacement runs $350 to $800 installed. A fill or flush valve repair is $175 to $350. If the closet flange has to be replaced, add $150 to $450.

Do you replace commercial toilets and urinals?

Yes. Flushometer valves, urinals, and full replacements, scheduled around your business hours rather than ours.

Can I replace a toilet myself?

Plenty of people do. The parts that catch them out are the closet flange, which has to sit at the right height on the finished floor, and the shutoff valve, which is usually older than the toilet and often will not close.

Written by the team at Shoresteady Plumbing, Temperanceville, Virginia. Master plumbing licensed in Virginia and Maryland. Prices shown are typical ranges for the Eastern Shore, not a quote. Your written estimate is the only number that binds either of us.

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Tell us what is going on and we will get you on the schedule. Written estimate before we start, and a 2-year workmanship guarantee on every job.