How to Choose the Right Pex Tools
I haven't seen a plumbing job that goes south because there was too much water in a house. I have seen more than my fair share of jobs fail because the installer used a set of three-piece crimpers on an eighth-inch line and didn't check for the "crush marks." We moved away from copper sweating joints and plastic push-to-connect garbage to PE-X tubing because it lasts. But only if you do the job right. The difference between a water heater that leaks in five years and one that lasts twenty isn't just luck; it's your toolkit.
The old school way is out.> If you are using tools made of plastic casings with ratchet handles that strip gears after three jobs, throw 'em away. This guide cuts through the manufacturer marketing fluff and tells you exactly what gear gets the job done when your boss isn't staring at you.
Table of Contents
1. The Hand Crimper: The Heart of Your Kit
A PEX system is nothing but a long string of fittings and connectors, but the weakest link in that chain is often the tool you make the final seal with. If you walk into a big-box store right now, they will sell you a three-jaw "ratchet" style crimping tool for twenty bucks. That is designed for lazy weekend handymen, not professional plumbers who need to guarantee their work holds up during winter freeze-thaw cycles.
Look for a single-rod or dual-rod mechanism that operates the jaws with a simple ratcheting pawl system. The most important thing here isn't how many gears are in the handle; it is whether you can get 60 pounds of pressure into that crimp. Cheap tools use rubber sleeves to "give" on hard surfaces; don't let that be your safety factor.
2. Precision Tubing Cutters
I'm serious about cutters. You can buy a wire stripper, use that to cut PEX, and you are good in a pinch on an emergency call. But if you want to look like the pro you say you are, you need ratcheting cutters with replaceable blades. There is a time when you will cut tubing for a client and it has a jagged edge or a slight oval shape. That tiny imperfection creates turbulence in your water flow and increases stress on the joint.
The best PEX cutters usually come with mandrels (the little internal rollers that smooth out the inside cut). You can get "clean cuts" by hand, but if you use those, don't be surprised when a 2-inch line is difficult to push into the expansion tool later if you are installing that way. You want zero friction points.
3. Deburring Tools You Can't Skip
This is where we separate the amateurs from the veterans. After you cut that PEX tube, the inside usually has a thick plastic nub called a burr. A 90% chance it will stay there and restrict flow; a 10% chance it will fall down into your PTRV (Pressure Temperature Relief Valve), killing your water heater instantly.
You can buy "deburring" tools that are just simple flat blades, but they often scratch the inside of the pipe. We like tools that swivel so you don't have to force the angle too much on the cut edge. A good kit should have a built-in cleaner tool and an insert for your tubing.
4. Ram Crimpers vs. Hand Crimpers
If your job allows you to use a hydraulic or electric "Ram" crimp tool, you will fall in love with it immediately. You pull the handle and the piston rams down on your PEX fitting with 60 pounds of pressure instantly. This is vital if you are doing retrofit work where there is zero room to twist a hand ratchet around your head or elbows.
However, Ram crimpers require space around your pipe to extend their ram mechanism. If you are working in a basement renovation with a drop ceiling, you might not have that luxury. A good Ram system usually comes with two heads, sometimes even three, so you can adjust the pressure based on your specific tube size and whether or not you are using a barbed fitting with an O-ring.
5. Why Expansion Crimpers Are Worth the Investment
We've all heard the debate: "Which is better? Ram crimp or expansion?" If you stick with standard PE-RT or PEX-A, an expansion tool might open up a bit of the world to you. The idea here is that you push out the pipe with heat, and when the copper O-ring expands in there, it shrinks down tight when the tool pulls back.
It eliminates almost every "o-ring" failure we've ever seen at the job site. When you are looking at a Ram set or hand crimper for expansion use, you usually don't need to worry about mandrels failing inside your line. You just want that heat source—the red glow on the pipe—and the way it squeezes the brass O-Ring into place is superior for longevity.
6. The Tool You Use Depends on Your Fittings
There is a common assumption that any crimp will work with any fitting brand. That lies to you. A SharkBite brand might take a SharkBite crimper tool specifically, while a Ferguson or Watts connection requires specific jaws and mandrels.
If you are doing this for yourself, you don't need the biggest box on the wall, but do not cheap out on your cutting or crimping tools. If you work professionally, buy high-quality PEX cutters and ratchets that have a 720-degree rotation capability. This allows you to turn your hand tool around the bend of the pipe without removing it from the line. A pro kit also should include some good spare O-rings and a marker pen for your tube size.
Frequently Asked Questions
Do I need to buy the same hand crimper brand as my Ram Crimper?
Sometimes, and sometimes not. If they make the same mandrel or sleeve diameter, you can often use them with each other. Just ensure your crimp tool jaws match the manufacturer's specs for the fitting ring.
Are 7-gauge ratchets necessary? What about 5?
A hand ratchet usually comes in 7 or 8 gauge sizes, while a Ram head often uses different specifications. Stick to manufacturer recommendations for your specific line size (usually 1/2 inch and 3/4 inch). Don't mix the two systems unless you are sure.
How far off should I measure my crimp?
You want to stop right at the center of your fitting. There's a little guide ring on the tool that stops the jaw from pressing too hard or not enough, but always mark your line with a blue marker so you don't cut it wrong.
I need to replace my mandrels for my hand crimpers. Are there generic ones?
Mostly yes, but check the brand compatibility. If you are using Watts or Watts brand connectors, you will want the Watts-compatible mandrel kits, or your sleeves might crush a little too loose in that ring.
What about expanding tools? Do they fit PEXB?
Precise expansion usually only works best on PEX-A tubing. If you use PEX-B (cross-linked), standard expansion crimping tools will crush the pipe and cause your system to fail.
Is it better to use a manual or electric heater?
If you are doing one bathroom, hand tools work. If you are running water through a whole house line in an old crawl space, get the power tool set because your hands will burn from the expansion heat.
DISCLAIMER: The content on this site is provided as general guidance only. It should not be used as the sole basis for any decisions or actions concerning your plumbing project. Plumbing requires specialized knowledge and equipment; follow manufacturer instructions to avoid damage, injury, or property loss.
Frequently Asked Questions
What is the best PEX tool for residential plumbing?
The best PEX tool for residential plumbing is a high-quality hand crimper that can handle various sizes and types of PEX tubing. Look for a crimper with adjustable jaws and a durable build to ensure consistent, reliable crimps.
How do I choose the right tubing cutter for PEX installation?
To choose the right tubing cutter, consider the diameter range it can handle and whether it is designed for PEX. A precision tubing cutter with a sharp blade and adjustable settings ensures clean, accurate cuts without damaging the tubing.
Is a deburring tool worth investing in for PEX installations?
Yes, a deburring tool is worth investing in because it removes burrs from PEX tubing, ensuring smooth connections and preventing leaks. It's an essential tool for any serious DIY plumber or professional installer.
How can I tell if my PEX crimpers are suitable for small diameter lines?
To determine if your PEX crimpers are suitable for small diameter lines, check the size range they can handle. Crimpers designed for eighth-inch lines should have adjustable jaws and be specifically labeled for small diameter PEX tubing.
What should I look for in a quality PEX hand crimper?
Look for a PEX hand crimper with adjustable jaws, a sturdy frame, and a reliable spring mechanism. A quality crimper should produce consistent crimps and be easy to use, even for beginners.
How do I know if my PEX tools are compatible with different fittings?
To ensure compatibility, check that your PEX tools are designed for the specific fittings you're using, such as push-fit or compression fittings. Tools with adjustable settings or multiple crimping modes offer greater versatility for different installation needs.
What is the most important PEX tool for a beginner plumber?
The most important PEX tool for a beginner plumber is a reliable hand crimper. It's essential for creating secure, leak-free connections. Pair it with a precision tubing cutter and deburring tool for a complete toolkit.
