Irritrol 100P1.5 Century Plus NPT Threaded Valve with Flow Control, 1.5" Tough, glass-reinforced nylon, stainless steel and brass construction - Withstands high temperatures and system surges under pressure for long-term reliability 221 psi pressure rating - Prevents water hammer and system damage in high-pressure installations Internal and external bleed (flush mode) - Manual operation Externally removable self-cleaning metering system - Provides consistent performance in recycled-water applications Accepts OmniReg modular pressure regulator (except 102 models) - Ensures consistent performance