Delta Faucet Company recommends you leave the existing fitting on the PEX supply tubing and not shorten the tubing. If you determine the PEX supply tubing for this faucet is too long and must be shorter to create an acceptable installation, be sure to read the instructions and plan ahead. When cutting the supply tubing, the installer accepts the responsibility to do so in a way that allows a leak-free joint to be created.  Delta is not responsible for tubing that is cut too short or cut in a way that will not allow for a leak-free joint. For custom fit installations, you must use RP50952 sleeves supplied with model and nuts included on supply lines. Tube cut must be straight. See plastic sleeve installation instructions found on RP50952.

NOTICE: DO NOT use a metal sleeve, RP51243 gasket (supplied with faucet) or ferrule in the place of the plastic sleeve supplied--it may not create a leak-free joint. Do not use pipe dope or other sealants on water line connections.

Instructions: Watch this how-to video for information on how to cut your PEX supply lines to size.

1. Identify desired length of tube (1). Leave 1" - 2" of extra length to allow for easier installation, and cut tube. Ensure cut is straight and burr free.

2. Slide nut (2) and plastic sleeve (3) onto cut tube. Ensure sleeve is oriented as shown.

3. Insert tube into outlet fitting (4). Tube should touch bottom of hole inside fitting.

4. Slide plastic sleeve down tube until it engages top of fitting. NOTICE: Failure to use plastic sleeve in the correct orientation will result in disconnection and possible water damage.

5. Slide nut over plastic sleeve. With wrench, tighten nut 2 turns past finger tight. Do not overtighten.