2 Supreme Pondmaster 02099 Adjustable 3-Way Diverter Valves fit 1/2" Male Pumps Used to control water flow to two devices (waterfalls, filters, fountain heads) Fits all 1/2" NPT male pump outlets Includes 1/2" female NPT coupling Durable ABS plastic construction Controls: "Off", on "On", both "On". Plus adjustable flow to each outlet