The Hydro-Rain 02041 1" HRV 100 Auto Inline Professional Valve Slip is a rugged valve that offers key performance features found on Hydro-Rain HRP valves. Built with strength and endurance to handle the challenges of light commercial sites, the HRV is available in a host of variations. Designed for small landscape applications, these models feature premium high-quality construction and a rugged diaphragm with support to prevent stress failure.