Irritrol 205T Globe Valve NPT Threaded Connection Without Flow Control, 1" Heavy-duty, corrosion- and UV-resistant PVC construction - Proven durability High-flow, low friction loss design - More efficient system design and low-flow capability Rugged, nylon-reinforced Buna-N diaphragm - Ensures a leak-proof seal Available in female NPT or slip configurations (no male pipe adapter required) - Will handle all regional installation variances Optional flow control - Allows precise adjustment and manual shutoff