Unit has 2 valves * Installs in minutes * Hand tighten; no tools required * Works with pvc and poly pipe systems; adapters for 3/4" and 1" pvc pipe included * Works with most existing sprinkler systems * Designed to fit the Orbit Valve Box Base #53230 * Expandable to a 4 valve manifold using Orbit part #57184 * Installs in minutes with no tools required