This tank only controls 2 corners..You will need to buy 2 of these tanks to control 4 corners.
VALVE + TANK
VALVE-INTEGRATED TANK CAPS
Includes the 2 solenoid valves and air tank all in one easy to mount package.
ADJUSTABLE FLOW CONTROL
Built-in VFC (variable flow control) adjusters allow for end user adjustment of the speed of each corner and each direction individually.
FILTERED PORTS
FFPTC (fully-filtered-push-to-connect) air fittings eliminate the risk of debris-induced valve problems common with all other solenoid valves on the market.