The following step by step guide explains:

How to find the right size tap for your installation.

Tools needed:

Tape measure

Time needed: 1 minute
Scroll to the bottom to see the video.

Step 1: Measure the wall thickness, in this case it is 8" (203mm).


The measurement is between the outer face of the drilled entry hole* to the outer face of the exit  hole. In this case it is 8" (203mm).
*Drilled holes should be on a slight downward pitch. See our installation guide for more detail.


Step 2: Our  wall measurement is 8"  so we  order an 8" tap. Note that the pipes are longer than 8".


Below is the 8" tap mounted through an 8" wall showing the additional pipe to connect to.


 NEVER CUT THE PIPES  as it will damage the tap beyond repair and invalidate any warranty.





Video: How to order the right length tap.