Aluminum Bonnet w/ Gauge Ports, Poly Bonnet w/ Gauge Ports
10-130 PSI, 5-60 PSI, 3-30 PSI, 20-250 PSI
(Size 1) 3/8" Inlet Hole, (Size 2) 11/16" Inlet Hole, (Size 2) 11-16" Inlet Hole, (Size 3) 13/16" Inlet Hole, (Size 3) 13-16" Inlet Hole
Relieving