FOUR STEPS TO MAKE A KnuckleHead EXTENSION*
KnuckleHead Extensions should be used with our product to elevate equipment and pipes above the adjustable height range of a base model KnuckleHead. Green Link provides extensions of 8, 12, and 18 inches. If you want to make your own size extension the following are the steps to make a custom extension.
Add a 3/8”x16 1-1/8” Hex Rod Coupling Nut Zinc Plated use thread locker screw half way onto base threaded rod as shown.
Next determine the size of the extension you are wanting to make. In this case we are making a 12” extension.
Cut 3/8”-16 threaded rod 2 ½” shorter than desired extension length – for 12” you will cut threaded rod at 9 ½”. Install threaded rod with thread locker placed on bottom to the Hex rod coupling nut securely tighten.
Cut 2 ½” Electrical Grade Schedule 40 PVC for the extension. You will cut this piece ½” shorter than the desired height of the extension. For the 12” Extension cut PVC to 11 1/2” and slip PVC extension onto Universal Base as shown.
Place the desired KnuckleHead top on the extension by screwing top onto threaded rod until it is firmly in place.
You have now completed the 4 steps to make an extension.
*If you are extending over 18” in height you will need our custom large base.