What's in a Union Pipefitter's Tool Bag: A UA Journeyman's Daily Kit
Walk onto any mechanical room job and you can pick out the UA guys before they open their mouths. It's the bag. Beat to hell, zipper half-busted, one strap held together with a zip tie that's been there since the Obama administration. Inside is a kit that took fifteen years of trial, error, and a lot of "borrowed" tools that never made it back to the gang box. This is what a working pipefitter actually carries — not the apprentice loadout from the supply house catalog, but the real daily kit that comes off the rack at 5:30 AM and goes back on at quitting time.
The Bag Itself
Before anything goes in, you need something to put it in. Most journeymen run one of three setups: a hard-bottom open-top tote, a heavy canvas zipper bag, or a rolling tool bag if their back has started filing grievances. The open-top is faster but everything's exposed to rain, sparks, and whatever's dripping from the overhead. The zipper bag keeps things clean but you're digging.
Hard bottoms matter. A soft-bottom bag set down on a wet slab soaks through and the rust starts before lunch. Some guys line the bottom with a piece of conveyor belt rubber they cut to fit. Others run a plastic boot tray. Whatever works. The bag itself usually has the Local number written on it somewhere in Sharpie or paint pen, because at a big job with six halls represented, gang box theft is a real conversation.
Inside the bag, organization is a personal religion. Some guys have it sorted into pouches like a surgical tray. Others operate on the principle that if you shake it hard enough, the right tool floats to the top. Both work. Neither is correct.
Hand Tools That Actually Get Used
Every pipefitter tool bag has a core of hand tools that come out every single day. Not the specialty stuff — the basics that you'd notice missing within the first hour.
Channellocks. Usually two pairs: a 10-inch and a 12-inch, sometimes a small 6-inch for tight work. The blue handles are standard. Anybody carrying knockoffs gets a look. These get used for everything from packing a valve to backing up a union while you break it loose with something bigger.
Pipe wrenches. A journeyman bag typically has an 18-inch aluminum and maybe a 14-inch. The 24-inch and bigger lives in the gang box or on the cart. Aluminum because your shoulders are not what they were at 22. Ridgid is the default. The teeth get dressed with a file when they start slipping, and replaced when dressing them stops working.
Levels. A torpedo level — magnetic, 9 or 12 inch — lives in every fitter's bag. The bubble vials get checked against a known flat surface periodically because a level that lies to you is worse than no level at all. Some guys carry a small digital level too for setting precise slopes on drain lines or running pitch on steam.
Tape measure. 25-foot minimum, usually 30. Magnetic tip is preferred because pipe is metal and you're often working alone. The hook gets bent inward over time and the readings start drifting — you replace it before that becomes someone else's problem.
Layout tools. Soapstone, a wrap-around (sometimes called a pipe wrap or contour marker), a center punch, and a fine-point Sharpie. The wrap-around is the difference between a clean square cut and a beveled mess. If you've never used one, an old journeyman will eventually shame you into buying one.
Files. A flat bastard file and a half-round, both with handles. Files without handles eventually find a way to draw blood.
Screwdrivers. A 10-in-1 covers most situations. A dedicated Phillips #2 and a long flat-head live in the bag too, because the 10-in-1 bit is always the wrong length when it matters.
The Cutting and Threading Layer
This is where pipefitter bags diverge from plumber bags. A fitter's daily kit usually doesn't carry a full threader — that's a cart tool. But it does carry the small stuff.
Mini tubing cutter. For copper and small-bore stainless when you can't get a full-size cutter in. The replacement wheels go in a tin somewhere in the bottom of the bag.
Reamer. Either a dedicated hand reamer or the fold-out blade on the tubing cutter. Burrs left inside a pipe cause turbulence, noise, and eventually a callback. Reaming is not optional.
Hacksaw and blades. Even with the band saw on the cart, you'll need to make a cut by hand somewhere a power tool won't fit. Bi-metal blades, 18 or 24 TPI for most pipe work.
Deburring tool. The little orange Noga or similar. Lives in a pouch.
Threading, Sealing, and Joining
The consumables drawer of the bag.
Pipe dope. Usually a small can of whatever your shop spec calls for — Rectorseal No. 5, Blue Block, or one of the high-temp variants for steam. Some guys carry two: one for water/gas and one for oil or steam. The brush in the lid is usually held together with hope.
PTFE tape. Yellow for gas, white for water, pink for potable, the heavy density stuff for anything serious. Yes, you use both dope and tape on some joints. No, the apprentice arguing about this on the internet is not going to convince his foreman.
Anti-seize. Copper or nickel, in a small bottle. Gets used on stainless fasteners and any bolted flange you ever expect to take apart again.
Power Tool Accessories
The cordless tools themselves live in their own cases or on the cart. What's in the bag are the bits, batteries, and accessories.
Drill bits. A bit index with the common sizes, plus step bits for sheet metal and unistrut. Cobalt bits for stainless. The 3/8" bit is always the one you can't find.
Hole saws. A small kit with the common sizes for running through stud walls or boxing in penetrations. The arbor gets lost more often than the saws.
Impact sockets and nut drivers. Magnetic nut drivers in 1/4", 5/16", 3/8", and 7/16" cover most strut and sheet metal work. A small impact socket set for unistrut nuts and beam clamps.
Spare batteries. Two minimum. The charger lives by the gang box.
Personal Protective and Personal Comfort
This stuff isn't technically tools but it's in the bag because if it's not, your day gets worse.
Safety glasses. A spare pair, because the first pair will fog, scratch, or disappear by 10 AM. Anti-fog wipes too.
Gloves. Cut-resistant for handling pipe, a heavier pair for hot work, and disposable nitrile for anything involving chemicals or oil. The good gloves last about three weeks. The cheap gloves last about three hours.
Earplugs. A bag of foam ones. Hearing damage is cumulative and you can't get it back.
Knee pads or knee savers. If you're under 30 you don't get it yet. If you're over 40 you wonder why you didn't start earlier.
A rag. Or four. Red shop rags, kept in a side pocket. Used for everything from wiping a joint to wrapping a wrench you just dropped in the mud.
Headlamp. Mechanical rooms are dark. Crawlspaces are darker. A small headlamp lives in the bag year-round, batteries checked Monday morning.
Q&A: Things Apprentices Actually Ask
Should I buy all my tools at once or build the bag over time?
Build it. Buying a full kit out of the apprenticeship book on day one means you own a bunch of tools you don't know how to use yet. Get the basics, then add a tool when you find yourself borrowing the same one three weeks in a row.
Is it worth buying the expensive brands as an apprentice?
For wrenches, levels, and anything that has to be accurate — yes. Buy once, cry once. For consumables and stuff you'll lose, the mid-tier is fine. Nobody's grading you on the brand of your tape measure.
Do I really need to mark all my tools?
Yes. Stamp them, paint them, engrave them, whatever your hall accepts. A clean job at the end of a shift means everyone's tools end up in a pile, and yours go home with you.
What about the Local number on the bag?
That's a personal call, but most journeymen who put in their time wear it somewhere. Bag, hard hat, shirt, jacket. It's not bragging — it's the same reason a regiment wears a patch.
The Stuff That's Not In the Catalog
Every veteran bag also contains a layer of tools you can't buy new. A pair of Channellocks that belonged to a father or an uncle. A homemade scribe ground from an old file. A union nut wrench someone made on a lathe during a slow shift. A laminated card with conversion tables that's been in the bag for so long the lamination is yellow.
These tools aren't more useful than what's in the supply house. They're in the bag because the trade is older than any of us, and the bag is one of the few places it gets carried forward in a visible way. Apprentices coming up now will, in twenty years, have something in their bag that the next generation looks at and asks about. That's how it works.
The bag is heavy by the end of the week. It always is. You haul it to the truck, you haul it home, you haul it back on Monday. Somewhere inside it is a receipt from 2019, three loose washers of unknown origin, and the entire working knowledge of the trade you signed up for.