What is a Pipe Wrench?

Pipe wrenches come in a wide range of sizes. For general purposes, an 8-inch or 10-inch wrench will work. Purchase pipe wrenches, which are made of steel or heavy-duty aluminum, at home improvement, hardware or department stores.

History

Daniel C. Stillson received a patent in 1869 for his design of the pipe wrench. Stillson went to plumbing companies promoting his wrench but was rejected until he presented the idea to James Walworth. Stillson designed a prototype and gave a demonstration. The Walworth Company then successfully manufactured the product. Stillson earned approximately $80,000 in royalties.

Types

Six types of pipe wrenches exist, all designed for specific purposes. The end pipe wrench has an easy grip and latches onto pipes that are close to a wall or restricted spaces. The offset wrench works for awkward angles and pipes in tight places. The compound leverage wrench provides added leverage for seized joints. The chain pipe wrench is for work in extremely tight places. The strap wrench is designed for plastic, plated or polished pipes; it will not put teeth marks on the pipe. The straight pipe wrench is the original design works for several purposes.

Use

Using the proper pipe wrench saves time and frustration. Learning the proper placement of each wrench assures the correct grip and prevents slips.

Maintenance

Proper maintenance of wrenches keeps them working properly. Clean the teeth of a wrench with a wire brush; dirt in the teeth may cause the wrench to slip. When teeth become worn or damaged, replace that part of the wrench. If the normal ratchet action fails, inspect the spring assembly and replace if needed. To avoid rust, lubricate the parts and store the wrench in a dry place.

Warnings

Never use a pipe wrench as a hammer.
Using the wrong size wrench may damage the wrench and the pipe.
Do not hit the wrench to loosen it or give it added leverage.
If the handle is bent, the wrench was overloaded and could be damaged. Do not use it.
Never use a pipe wrench near a flame, which can cause the teeth to become soft.