Sterilight S8Q-Gold 8 gpm UV light with an electronic ballast providing constant output irregardless of input voltage variation, an intensity monitor including visual and audio alarms, solenoid control output (valve not included) and an LED IR (infrared) output, with an 8 gpm external chrome plated brass flow control and a 3/4" in/out clear housing prefilter with pressure relief valve and wrench. Free Shipping. $560