Out-score the list.Don’t miss the window.
Getting into the union pipe trades runs through one aptitude battery and one application window — and the window is the part people miss. PipePrep AI is 10 full-length practice batteries, 1,500+ questions and Piper your AI tutor, plus a tracker watching when 220 UA locals open.
Free to download · 7-day free trial on Pro · iPhone & iPad
110 locals accepting applications
Get an email the day your local opens
Some windows are open for two weeks a year, and competitive locals cap out in days. Pick your local and we’ll tell you the moment it opens.
Free practice
Pick your trade
Every UA trade sits the same aptitude battery. Start with the hub for the trade you want.
Plumber
Water, waste, and gas systems — the trade every building depends on.
Free 22-question practice test →
Pipefitter
Industrial process piping and welding — refineries, power plants, heavy work.
Free 22-question practice test →
Steamfitter
High-pressure steam and commercial HVAC-R — heat, pressure, precision.
Free 22-question practice test →
Sprinkler Fitter
Fire protection systems — life-safety work in the NFPA world.
Free 22-question practice test →
Application window tracker
Most people miss their local’s window. Don’t.
We track apprenticeship application windows at 220 UA locals and re-check them on a rolling schedule. Some windows are open for two weeks a year. Some cap applications and close early. Find your local, see where it stands, and get an email the moment it opens.
220
Locals tracked
110
Accepting now
Daily
Re-verification
Always confirm with the local before you make plans — windows change on short notice, and we show the date we last verified each one on its own page.
Full-Length Batteries
10 complete, timed practice batteries built to mirror the real union pipe trades aptitude test — reading, math, spatial folding, and mechanical comprehension.
AI Mock Interviews
The panel interview counts toward your rank right alongside your test score. Rehearse it with AI panels that ask live follow-ups and score you on the six dimensions real panels use.
Piper, Your AI Tutor
Stuck on a problem? Piper walks you through every question step by step, in plain language, until it clicks.
Free Field Tools
Pipe offset calculator and field-ready math tools — free forever, no subscription required.
UA Locals Directory
Find union plumbing, pipefitting, steamfitting, and sprinkler fitting locals near you, with apprenticeship info at your fingertips.
Built for the field, not the classroom
One battery gates every UA trade
Six sections, about 140 questions, roughly two hours — and no calculator allowed. Your score ranks you against every other applicant on the list.
Who built this
Michael Briglio — pre-apprenticeship instructor
I teach a federally recognized pre-apprenticeship program and I’ve helped hundreds of students get accepted into union apprenticeships. My own trade background is electrical, not pipe — so every test fact and wage figure on this site is cited to a source instead of remembered.
More about me and why I built PipePrep AI