DIY
Toilet repair, without calling a plumber.
Plain-English fixes for the most common toilet problems – running, clogged, leaking, wobbling, weak flush. And the honest answer to when you should actually call a pro.
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About this pillar
Most toilet problems are one of five things, and four of them you can fix yourself.
A running toilet wastes 6,000 gallons of water a month. A wobbly toilet leaks slowly enough that you don’t notice until the subfloor rots. A clog at 11 PM on a Sunday becomes a $400 emergency plumber call if you don’t have a plunger.
These are the five categories of problem we cover, in the order they’re most likely to happen.
- The clog – the panic moment. Plunger, hot water, snake.
- The runner – the slow drip that doubles your water bill. Flapper, fill valve, float.
- The wobble / leak – wax ring, flange, shims, caulk.
- Installation & replacement – full DIY toilet swap with photos.
- The weird stuff – gurgling, sewer smell, water in the bathtub.
Latest in this section
Repair guides, published.
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How to remove a toilet: drain it, break the seal, lift it, and get rid of it
How to remove a toilet: drain it, break the seal, lift it, and get rid of it By Ariel, last updated September…
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Can you flush tampons? The plumber’s verdict on 16 things people put down the toilet
Can you flush tampons? The plumber’s verdict on 16 things people put down the toilet By Ariel, last updated September 25, 2026.…
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Toilet supply line guide: sizes, lengths, line types, and the ones that fail
Toilet supply line guide: sizes, lengths, line types, and the ones that fail By Ariel, last updated September 25, 2026. A toilet…
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Plumbing tools for homeowners: the kit that toilet and fixture work actually calls for
Plumbing tools for homeowners: the kit that toilet and fixture work actually calls for By Ariel, last updated September 25, 2026. Most…
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Installing a new toilet: the planning and buying guide before you lift a wrench
Installing a new toilet: the planning and buying guide before you lift a wrench By Ariel, last updated August 12, 2026. TL;DR:…
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Parts of a toilet: a plumber’s glossary of every piece in the tank and bowl
Parts of a toilet: a plumber’s glossary of every piece in the tank and bowl By Ariel, last updated August 12, 2026.…
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How to replace a toilet seat: identify your bolts, break the seized ones, and buy the seat that actually fits
How to replace a toilet seat: identify your bolts, break the seized ones, and buy the seat that actually fits By Ariel,…
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How to Caulk Around a Toilet: The Three-Sided Rule and Why Caulking All the Way Around Hides Leaks
How to Caulk Around a Toilet: The Three-Sided Rule and Why Caulking All the Way Around Hides Leaks By Ariel. Last updated…
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How to Stop a Toilet From Sweating: The 2-Minute Diagnosis and the 4 Fixes Ranked
How to Stop a Toilet From Sweating: The 2-Minute Diagnosis and the 4 Fixes Ranked By Ariel, last updated July 1, 2026.…
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How to Replace a Toilet Fill Valve: The 15-Minute Job and the 4 Mistakes That Make It Fail
How to Replace a Toilet Fill Valve: The 15-Minute Job and the 4 Mistakes That Make It Fail By Ariel, last updated…
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How to Fix a Running Toilet: The Symptom-Based Flowchart Plumbers Use
How to Fix a Running Toilet: The Symptom-Based Flowchart Plumbers Use By Ariel, last updated July 1, 2026. Most “fix a running…
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How to Replace a Toilet Flapper: The $4 Fix Most Plumbers Charge $120 For
How to Replace a Toilet Flapper: The $4 Fix Most Plumbers Charge $120 For By Ariel, last updated July 1, 2026. A…
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