Midwest Control
Midwest Control G-F600-250 Ball Valve 2 1/2in Brass 350 WOG 125 PSIG Lever
A nice touch with this spinner is the audible click that confirms each adjustment.
New Open Box Midwest Control OPT-50 1/2" NPT/115VAC/230PSI 51772HM
The max110 model has a straightforward design that avoids complexity.