In-line installation reduces pressure loss and is designed for below-ground installation. Ideal for pump systems where backflow protection is not required. Optional On/Off manual control, flow adjustment control, and spray-free internal bleed. Body construction is of durable, noncorrosive PVC plastic offering maximum resistance to ultraviolet light deterioration. All solenoids have a rust and weather-proofed full plastic jacket. 24V AC; works with any 24V sprinkler timer.