Crimping PEX and Stainless Bands

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Mr. Rooter's Tip Of The Day: Position the scissors square to the pipe and push the handles together to cut through the pipe.

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The most common error is crimping the ring out of place. After verifying the ring is still positioned properly, place the crimper jaws over the ring, making sure it lies at 90 degrees to the pipe.

“PEX cuts easily with a sharp ratcheting scissors. Position the scissors square to the pipe and push the handles together to cut through the pipe,” says Bob Beall, president of Mr. Rooter Plumbing. Mr. Rooter Plumbing serves 2.9 million customers in the Northeast Ohio and Southwest Pennsylvania area.

Mr. Rooter’s Tip Of The Day

PEX CRIMPING

Tip #1 Insert the copper ring over the pipe.

Tip #2 Don’t worry about placement of the ring at this time. Slide the fitting into the pipe as far as the fitting will allow. Some fittings have physical stops built in, which makes this task foolproof. Always install the rings with the procedures recommended by the manufacturer of the PEX pipe that is being used for the project. Most PEX varieties require you to slide the ring up against the fitting shoulder, then back it off the shoulder by about 1/4 inch. However, some manufactuers design their fittings so the ring bumps up against the shoulder and stays there.

Tip #3 Using a pliers, gently squeeze the ring tight against the pipe.

Tip #4 At this stage, the ring must be tight enough to keep the crimpers from moving it out of place as you begin to crimp it. The most common error is crimping the ring out of place. After verifying the ring is still positioned properly, place the crimper jaws over the ring, making sure it lies at 90 degrees to the pipe.

Tip #5 Close the jaws of the crimper completely. It will be obvious when the ring compresses. The crimper must not move the ring out of place. Open the jaws of crimpers all the way. Visually check the ring to make sure it’s the proper distance from the fitting shoulder and that it’s been crimped fully around its circumference and not at an angle.

Tip #6 If the ring is imperfectly crimped, it will be necessary to cut the pipe, remove the ring and start over.

STAINLESS BANDS

Tip #1 Slide the stainless band onto the pipe.

Tip #2 Insert the fitting into the PEX pipe.

Tip #3 Adjust the stainless band so it’s 1/4 inch from the fitting shoulder (p0r at the distance recommended by the manufacturer) and crimp the band with the crimping tool.

Tip #4 Make sure the band is placed correctly on the fitting, square to the pipe and crimped properly around its entire circumference.

Mr. Rooter’s Daily Tips are provided by Mr. Rooter Plumbing.
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Rooter (Pittsburgh)

Robert A. Beall
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