Start the test

Tests

Driving testsCitizenship testsSchool and university admissionsNursing, medicine and healthEnglish and French testsTeachingMoney, law and insuranceTrades and work licencesPilots, drones, boats and radio

Countries

United StatesCanadaUnited KingdomAustraliaNew Zealand

United States · Licensing exam

Plumbing practice test

Here are 20 free practice questions on the basics every plumbing code shares: drainage, venting, traps, water supply, backflow, fixture units, materials and safety. They’re our own questions, not copied from any exam, and they work whether your state uses the IPC or the UPC. 14 right is a pass at the 70% mark Texas and Washington use. After each answer you’ll see why it’s right, and you can ask the tutor if it still doesn’t click.

Start the test

Updated October 2026 · Written from official sources, listed at the bottom of this page

Question 1 of 20

What is a pipe that carries the discharge from water closets (toilets) called?

Sample of the exam: same format, 20 questions.

Explore

Everything else, in one place

OverviewPlumbing examCostHow much does it cost to get a plumbing license?Online examCan you get a plumbing license online?Study guidePlumbing exam study guide: what to studyWhere to learnPlumbing school, apprenticeships and exam prep
Sources: TSBPE and Pearson VUE, TSBPE, PSI. Checked October 2026.

Rules and fees can change, so check the official site before your test.