Press Fittings and Valves: Small Diameter Installation

Written by Ashley Petersen 2016-11-01

NIBCO® Press System® ½” – 2” fittings and valves are designed to be joined with NIBCO pressing tools and most other pressing tools on the market. This installation video demonstrates how easy it is to install the NIBCO Press System.

Before beginning, review the installation instructions found in the NIBCO Press System catalog or the instructions included with the product, and the pressing tool user’s manual, to prevent serious injury.

Step 1: Attach Crimping Jaws

  • The first step is to remove the battery or unplug the cord on the pressing tool

    Press Fittings

    prior to attaching or changing the crimp jaws.

  • Next, push and twist to open the jaw set mounting pin.

  • If the press tool contains a jaw set, slide it out of the crimping tool.

  • Select the jaw set that corresponds to the size of the joint to be crimped and insert it into the pressing tool.

  • Push the jaw set mounting pin until it clicks into position.

Step 2: Calibrate the Press Tool with a Jaw Set

Press Fittings


  • To calibrate the pressing tool, insert a fully charged battery into the base of the tool.

  • Complete one tool cycle with the empty jaw set (this means no fitting or valve should be in the jaw). The tool and jaw are now ready for use.

Step 3: Prepare the Copper TubePress Fittings

  • Common piping practices should be followed when preparing the copper tube. For example: Tubing that is difficult to insert may have burrs or could be out-of-round. Make sure the tubing ends are clean, undamaged, cut square, deburred and reemed.


Step 4: Insert the Tube into the Fitting or Valve

Press Fittings

  • After preparing the copper tube, the first step is to check the fitting or valve to make sure the EPDM seal is in place and is free of oil

    and grease.

  • Never lubricate the EPDM seal in the NIBCO Press System fitting or valve with anything other than water. Oil lubricant, dirt or debris may damage the seal. An improper seal can lead to extensive property damage.

  • Using a tape measure, ruler or insertion depth gauge, mark the tube with a permanent marker to indicate the minimum tube insertion depth (Refer to the minimum insertion depth table in the instructions for correct depths).

  • Insert the tube into the fitting or valve using a twisting motion. Make sure the tube is inserted to the proper depth. Failure to do so may result in an improper seal. When inserted properly, the fitting or valve should cover the insertion depth mark.

Step 5: Crimp the Fitting or Valve

Press Fittings

  • Once the tubing is inserted into the fitting or valve at the proper depth, squeeze jaw arms to open the jaw set.

  • Then place the open jaws around the fitting and ensure the contour of the jaw is properly aligned with the contour of the fitting or valve.

  • Make sure the tool is square to the tubing and depress the switch.

  • Once the crimp cycle begins and the rollers contact the jaw arms, the tool will complete the crimp cycle, as long as the trigger is depressed (Please note that releasing the trigger will stop the tool once the crimping process has begun. Depressing the trigger again will continue the crimp cycle).

  • The entire cycle duration to make a watertight and permanent connection is approximately 4-8 seconds.

  • After the crimp cycle is complete, press the jaw arms to open and remove it from the fitting or valve. Be sure to avoid any sharp edges that may have formed on the fitting during the crimping operation.

Step 6: Inspect the CrimpPress Fittings

  • Inspect the crimped fitting or valve to ensure a proper crimp and application of the unique NIBCO® Press System witness mark (N).

  • If the witness mark is not evident, inspect the crimped fitting or valve for one of the following:

    • a misaligned tube
    • not fully inserted tube; re-check the depth marks

    • incorrect jaw alignment with the fitting contour

  • If one or more of these problems are found, a new section of tubing and a new fitting or valve will need to be prepared, installed, and crimped.

  • Finally, test the NIBCO® Press System in accordance with normal practice and to local jurisdiction piping code.

The NIBCO Press System is a safe, easy, and fast way to install a copper piping system, and is backed by a name you can trust. For more information on press, download our free NIBCO Press System Quick Reference Guide.

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