How to Use an Adjustable (Crescent) Wrench, Pipe Wrench and Tongue & Groove (Channel Locks) Wrenches

My grandfather is a really interesting guy. He grew up working in the Pennsylvania coal mines starting at the age of 7 or 8. Then, he worked as a well driller, was a plumber, went to HVAC school, did some gas work, worked a while as an electrician, became a welder, was a diver, and ended up as an aircraft salvage man.

One of his favorite phrases is to call adjustable wrenches and channel locks (slip groove or tongue and groove pliers) “shoemakers' tools. I literally have no idea WHY he would call them that—or why he thought it was so funny to call them that—but he certainly didn't mean it as a compliment.

It is usually best to use a properly sized socket or wrench to do a job rather than reaching for a “multi-purpose” wrench. However, every tool has a purpose. If you are going to use a tool, it's best to use it properly. I know this is basic, but we can't assume everyone has a grandpa like mine. So, here is my guide about using adjustable wrenches and channel locks.

Pull, don't push (when you can)

Whenever possible, orient the wrench so that you are pulling rather than pushing. (Yes, I know I'm awkwardly pushing in the GIF below.) Pulling is a much more smooth and natural motion. As a result, you will be able to apply more force.

Pipe wrenches are special

Unlike adjustable wrenches, pipe wrenches are only for working with pipe, NOT nuts and bolts. I know that should be obvious, but I worked with a guy once who treated a pipe wrench like a regular wrench. Needless to say, he left a lot of damaged bolt heads in his wake.

A pipe wrench has sharp, angled teeth that will grip in one direction and release in the other direction. Open the jaw wide enough that the pipe sits in about the center of the pipe wrench, unlike a typical wrench that requires the object to be turned to sit all the way in the back of the jaws.

Keep in mind that a pipe wrench will leave marring on the surface of the pipe. If you don't want it to be damaged, you can use a leather (or even rubber) strap around the pipe to protect it before using the wrench. A leather belt can do the trick.

Turn the wrench toward the bottom jaw

Maybe there is an exception to the rule, but it's not in any of my wrenches. If you turn the wrench toward the bottom jaw, they will grip properly and be less likely to slip. In order to tighten vs. loosen, just flip the wrench over and turn in the opposite direction.

Righty-tighty is annoying

Half my childhood was HAUNTED by the phrase righty-tighty, lefty-loosey. IT IS ROUND! There is no right or left unless it is a reference to another direction (the top)! It's better said as clockwise-tighty… and yes, I know that doesn't sound cool. So, if you or an apprentice you know just HATES righty-tighty as much as I do, you're not alone. I explain how examples like “righty-tighty” are counterproductive in THIS article.


P.S. – If you'd like to learn more about tools, check out some of the tech tips and videos below:

Don't Forget the Service Wrench

Why You Need a Torque Wrench (or Two…)

Market Refrigeration Tool Bag Overview (video)

2 responses to “How to Use an Adjustable (Crescent) Wrench, Pipe Wrench and Tongue & Groove (Channel Locks) Wrenches”

  1. Hello Bryan, I may know why your grandfather used to call adjustable wrenches and channel locks as “shoemakers tools”. I happened to visit the Channellock company website to learn more about channel lock pliers after reading your article and there I learned that in 1902 the company received an order for a “complete set of farrier’s tools from the royal horse-shoer for England’s reigning monarch Edward VII”. So I think that your grandfather called them “shoemakers tools” as they were probably very popular among horse-shoe makers at that time.

  2. One possible exception to the rule is the Bahco 9072 RP US Adjustable/Pipe Wrench when you reverse the jaws to use it as a pipe wrench. That is my emergency I forgot the pipe wrenches gas valve wrench.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Related Tech Tips

Refrigeration Pump-down Cycle
This article was written by Jeremy Smith CM, an experienced refrigeration tech and all-around great dude. Thanks, Jeremy. A very common means of control seen on refrigeration equipment is the pump down control. Why do we use this rather than just cycling the compressor off and on like a residential HVAC unit? Since most refrigeration equipment […]
Read more
MeasureQuick Launch Is HERE
For those of you who follow the podcast, you know how excited I am about the new MeasureQuick app and what it will do to help technicians make better measurements and diagnoses. The app is NOW AVAILABLE on Android and will be available within hours on iOS (Apple). To find out more and to download, […]
Read more
It's a Wonderful Life (Compression Refrigeration Edition)
Every year. We watch it EVERY YEAR, and it still gets to me again and again. Call me a sucker, but especially living a blue-collar life working in the trades, It's a Wonderful Life describes the way many of us live. Even more so, it captures the way we can start to feel about our […]
Read more

To continue you need to agree to our terms.

The HVAC School site, podcast and daily tech tips
Made possible by Generous support from