ProfessionalToilet Flapper Replacement

A running toilet is almost always a worn flapper — the rubber valve that drops to seal the tank after each flush. Left alone it can waste dozens of gallons a day. Replacing it costs almost nothing and takes minutes. We identify the right size, swap it out, and confirm the running stops before we leave.

Also known as: toilet flapper replacement, fix running toilet, toilet flapper repair, replace toilet flapper, running toilet repair, toilet valve repair, toliet flapper

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What you get

What’s included

Diagnose the source of a running toilet
Remove old flapper and inspect seat for wear
Install correct-size replacement flapper
Adjust chain length for proper flush and closure
Verify running stops and flush performs normally

Simple & stress-free

How it works

Confirm the diagnosis

We lift the lid, observe the fill and drain cycle, and check whether the flapper, fill valve, or float is responsible for the running water.

Replace the flapper

We shut off the supply, flush the tank empty, unhook the old flapper, and snap on the correct replacement, adjusting the chain to the right length.

Test and confirm

We open the supply valve, let the tank fill, and listen and look to confirm the running has stopped and the flush is clean.

We can help

Problems we fix

Toilet that runs for 30–60 seconds after every flush — a flapper not seating fully
Toilet that runs continuously because the flapper has hardened or cracked
Wrong-size replacement flapper installed, causing the same leak to continue
Chain too short, holding the flapper off the seat permanently

Good to know

Toilet Flapper Replacement — FAQ

Can I diagnose this myself before calling?

Drop a few drops of food coloring in the tank without flushing. If color appears in the bowl within a few minutes, the flapper is leaking. That's your confirmation.

What if the flapper replacement doesn't stop the running?

If the seat (the surface the flapper rests on) is pitted or warped, a new flapper still won't seal. In that case, a full flush valve replacement fixes the problem — we assess and recommend on the spot.

Is a running toilet urgent?

Not a safety emergency, but a running toilet can waste several hundred gallons a week. It's worth addressing promptly — the fix is fast and inexpensive.

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