RDspaguy
In The Industry
I went through a spa parts book from 2012 and found it. Original manufacturer, G&G industries, was bough out by another industry manufacturer which explains the difficulty in locating it. Once I had a part number the search was much easier. And yes, there is no other air control that has that design on the knob and operates like this one. They were very common on portable spas when I started in this business 25 years ago. I have seen countless numbers of them over the years.