Home & DIY

Fixing a Leaky Faucet and Other Plumbing Basics

Find, diagnose, and fix common household leaks with confidence, and know exactly when to call a pro.

This course is for members

$9 unlocks every course in the library, this one included, plus a credit to build a topic of your own and at least 10 new courses every month.

Join for $9Sign in

What you will learn about Fixing a Leaky Faucet and Other Plumbing Basics

The 7-day sprint
  1. Find the Water and Turn It Off. Before you touch any plumbing, you must know where every shutoff is and prove that you can stop the water.
  2. Identify Your Faucet Type. Faucets come in four mechanical families, and identifying yours correctly is what makes the difference between a fifteen minute repair and a wasted afternoon.
  3. Rebuild a Compression Faucet. A dripping compression faucet almost always means one worn seat washer, and replacing it is the single highest-value plumbing repair a beginner can learn.
  4. Cartridge, Ball, and Ceramic Disc Repairs. Washerless faucets are fixed by swapping a whole sealed part, so the skill is exact part matching and careful extraction, not fine adjustment.
  5. Hunt Every Leak in the House. Most household water waste is silent, so you find it with a meter test, a bill check, and a dye test rather than by listening for drips.
  6. Aerators, Flow Rates, and What the Law Requires. The aerator on the end of a faucet controls flow rate and is the cheapest, easiest plumbing part you will ever service.
  7. Traps, Supply Lines, and Knowing Your Limits. Drain and supply work follows a few fixed rules, and the mark of competence is knowing which jobs are yours and which belong to a licensed plumber.
The 80/20: the 7 concepts that matter most
  • Shut off and depressurize before anything else
  • The soft part fails, not the metal
  • Identify the faucet type before you buy a single part
  • Read the leak's exit point to name the failed part
  • Silent leaks are the expensive ones, and you find them with a meter
  • Flow rate is regulated, and the aerator is where it lives
  • Traps, vents, and lead-free law set the boundaries
The core idea, explained like you are 5

A faucet does not stop water by turning it off; it stops water by squeezing a soft part against a hard part so tightly that pressurized water cannot squeeze through, and a leak means that seal has failed.

Then the quiz and the ladder

10 questions that correct you when you are wrong, and beginner, intermediate, advanced levels, each with a practical exercise.

Created Sep 13, 2026. No mistakes have been reported by learners.

Written from these sources