Description

Dome Hole Plug 11/4

This is the plug ( DHP12 ) that caps the small 1 1/4″ “fill” hole used on many acid neutralizing filter tanks.
Includes o-ring.  We also have the o-ring available separately.  NOTE: Threaded portion of the plug measures 1 1/2″ across.
It’s called 1 1/4″ because plumbing measurements are always the inner most “depth” of the Thread area, and not the “outer” diameter of the Threads.
Also, you’ll notice it fits in a hole in tank that measures about 1 3/4″ across.