Irritrol 216B Globe/Angle Valve NPT with Flow Control, 1.5" Heavy-duty, corrosion- and UV-resistant PVC construction with stainless steel spring and hardware - Provides consistent operation Slow-closing design - Reduces water hammer and resulting stress on the system Rugged, double-beaded SANTOPRENE diaphragm - Ensures a leak-proof seal Internal and external bleed (flush mode) - Allows for manual operation Accepts OmniReg modular pressure regulator - Ensures consistent performance