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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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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How to Adjust a Toilet Float (All 4 Float Types, 5-Minute Fix)
How to Adjust a Toilet Float (All 4 Float Types, 5-Minute Fix)
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How to Replace a Toilet Wax Ring (30-Minute DIY, Done Right)
How to Replace a Toilet Wax Ring (30-Minute DIY, Done Right)
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How to Measure a Toilet Rough-In (5 Minutes, One Tape Measure)
How to Measure a Toilet Rough-In (5 Minutes, One Tape Measure)
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How to Fix a Wobbly Toilet (Diagnose the Real Cause First)
How to Fix a Wobbly Toilet (Diagnose the Real Cause First)
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