Originally Posted by
TapTapTap
I've been confused about the modulating draw-offs since last year when I looked into replacing my non-modulating setup. I thought I understood from looking at various systems from suppliers that the modulating feature is available only on 1.5" and larger piping, and I thought that would be for butterfly valves. It sounds like the modulating feature might also be available on the 1" piping and with a ball valve. I just today looked at some of the websites of the suppliers, I found it difficult to see whether their systems are either modulating or butterfly vs. ball.
What are others understanding?
Ken