Water Source AV-57 Deep Well Air Volume Control, Plastic Clearance Round back plate is 4-1/2

Round back plate is 4-1/2 inches in diameter

semi-vitreous or non-vitreous tile: ceramic

Dog leg handle for better leverage when twisting wire

Width: 20'

Water Source AV-57 Deep Well Air Volume Control, Plastic Clearance Round back plate is 4-1/2Balance the air volume in galvanized water tanks when using deep well pumps with this Plastic Deep Well Air Volume Control. This float opens the main valve of the control in your system to allow access to air out into the atmosphere. The float then rises with the water level and the main valve closes, trapping the remaining volume of air in the tank. Highlights: Material: Plastic Pressure Gauge Port: 1 4 inch 1 1 4 Inch MPT connection Deep well air