The IQ Water Valve is a retro fit servo that can operate 1/4 turn ball valves with pipes from 1/2" to 1 1/4" and installs easily WITHOUT THE NEED FOR A PLUMBER. It uses powerful Z-Wave 700 for maximum range and reliability to the IQ Panel.Includes(1) IQ Water Valve QZ2160-840(2) Flood PG9985Main FeaturesZ-Wave Plus 700 series communicationAdaptive torque outputFits quarter turn ball valves with pipes from 1/2 inch to 1 1/4 inchMax adaptive torque max of 8n.mDimensions of 14.8 x 9.6 x 13.3mm