Products A Timer/Controller is required, if the submersion depth is less than One Third of the total lift height. The timer/controller contains an electronic 2-stage timer, which controls 3 solenoid operated valves. It cuts the air supply to the pump at intervals that you set for best performance for your situation. One valve cuts the air to the pump, one vents the pressure from the pump and the third directs the air flow to the water delivery line to assist water delivery to the end outlet (tank or basin etc) and keeps the amount or water in the delivery line down. This reduces the pressure required from the compressor for the lift. The timer box needs to be mounted near the location of the pump and is built to simply accept the air supply line into the 3 attachments. Timer/controllers are available to operate off 12 Volt or 240 Volt supplies. For more Details please Contact Us        Copyright © 2005 FERI Pumps, Inc. All rights reserved.