The honest DIY plumbing field guide Free tools · Plain-English guides · No upsells
Plumbing by the Book.
  • Guides

    Faucets

    • All Faucets →
    • How Much Does It Cost to Repair a Faucet? DIY vs. Hiring a Plumber [2026]
    • How to Identify Your Price Pfister Faucet Cartridge [2026]
    • How to Identify Your Pfister Faucet Cartridge [2026]
    • How Much Does It Cost to Replace a Faucet Cartridge? [2026]

    Toilets

    • All Toilets →
    • How to Identify Your Toilet Fill Valve [2026]
    • When to Replace the Whole Toilet (vs. Repair) [2026]
    • How to Identify Your Glacier Bay Toilet Parts (the Fluidmaster and Niagara Components Inside) [2026]
    • What Size Flapper Do I Need? How to Choose the Right Toilet Flapper and Fill Valve [2026]

    Showers

    • All Showers →
    • How to Identify Your American Standard Shower Valve: Trim, Cartridge, and Rough-In Valve [2026]
    • How to Identify Your Moen Shower Valve: Cartridge Family and Series [2026]
    • How to Identify Your Kohler Shower Valve: Rite-Temp, MasterShower, and Cartridge Family [2026]
    • How to Identify Your Pfister Shower Valve: Model Number, Cartridge, and Valve Family [2026]

    Drains

    • All Drains →
    • When to Call a Plumber for Drain Problems [2026]
    • Drains and Pipes Guide: The Complete Homeowner’s Overview of What’s Behind Your Walls [2026]
    • Why Are My Drains Slow? Causes, Diagnosis, and 3 DIY Fixes [2026]
    • How to Use a Drain Snake: Step-by-Step Guide for Homeowners [2026]
    Browse all guides →
  • Free Tools
    • Cartridge & Valve Finder Find the exact faucet, shower, or toilet part you need.
    • Toilet Water-Waste Calculator See what a running toilet is costing you.
    • Repair Cost Estimator What a plumbing job costs -- DIY vs. a pro, with sources.
  • Data Study
  • About
Find your part
  • Guides
    Faucets How Much Does It Cost to Repair a Faucet? DIY vs. Hiring a Plumber [2026] How to Identify Your Price Pfister Faucet Cartridge [2026] How to Identify Your Pfister Faucet Cartridge [2026] How Much Does It Cost to Replace a Faucet Cartridge? [2026] Toilets How to Identify Your Toilet Fill Valve [2026] When to Replace the Whole Toilet (vs. Repair) [2026] How to Identify Your Glacier Bay Toilet Parts (the Fluidmaster and Niagara Components Inside) [2026] What Size Flapper Do I Need? How to Choose the Right Toilet Flapper and Fill Valve [2026] Showers How to Identify Your American Standard Shower Valve: Trim, Cartridge, and Rough-In Valve [2026] How to Identify Your Moen Shower Valve: Cartridge Family and Series [2026] How to Identify Your Kohler Shower Valve: Rite-Temp, MasterShower, and Cartridge Family [2026] How to Identify Your Pfister Shower Valve: Model Number, Cartridge, and Valve Family [2026] Drains When to Call a Plumber for Drain Problems [2026] Drains and Pipes Guide: The Complete Homeowner’s Overview of What’s Behind Your Walls [2026] Why Are My Drains Slow? Causes, Diagnosis, and 3 DIY Fixes [2026] How to Use a Drain Snake: Step-by-Step Guide for Homeowners [2026]
  • Free Tools
    Cartridge & Valve Finder Toilet Water-Waste Calculator Repair Cost Estimator
  • Data Study
  • About
Skip to content
Plumbing By The Book
  • Home
  • Guides
  • About Plumbing By The Book
  • Privacy Policy
  • Home
  • Guides
  • About Plumbing By The Book
  • Privacy Policy
Category

Pillar 2 – Toilet Repair

How to replace a toilet flapper: a homeowner clipping a new red rubber flapper onto the flush valve inside a toilet tank

How to Replace a Toilet Flapper: The $10 Fix for a Running Toilet [2026]

A worn flapper is the single most common cause of a running toilet, and replacing it is one of the cheapest, fastest…

June 8, 2026 · 8 min read

How to unclog a toilet: a homeowner using a black flange plunger in a toilet bowl

How to Unclog a Toilet: Plunger, Auger, and What Not to Do [2026]

A clogged toilet is one of the most common – and most stressful – plumbing problems a homeowner hits, but the good…

June 6, 2026 · 10 min read

Why is my toilet running diagnostic hero showing a homeowner inspecting the toilet tank with the float lifted to check the fill valve

Why Is My Toilet Running? 6 Common Causes [2026]

If you can hear water trickling into the bowl long after a flush, or the fill valve cycles for a few seconds…

May 31, 2026 · 16 min read

How to identify your toilet brand and model: flashlight angled across the back wall of an open toilet tank to read the stamped model number

How to Identify Your Toilet Brand and Model [2026]

A leaking flapper costs $4 to fix and a fill valve costs $10, but only if you buy the right one. Buy…

May 30, 2026 · 14 min read

← Previous 1 2
© 2026 Plumbing by the Book • Built with GeneratePress
Plumbing by the Book.

The anti-upsell plumbing resource. Free tools, plain-English guides, and the honest truth about when to call a pro.

Guides

  • Faucet repair
  • Toilet repair
  • Shower & tub
  • Drain repair
  • All guides

Free Tools

  • Cartridge & Valve Finder
  • Water-Waste Calculator
  • Cost Estimator

Company

  • Data study
  • About / Our process
  • Contact
  • FAQ
  • Affiliate disclosure

© 2026 Plumbing by the Book. All rights reserved. Privacy Terms

As an Amazon Associate we earn from qualifying purchases.