Biogarden Trickle Valve - 1 1/4-Inch
Trickle Valve is Bioponica's alternative design to the conventional bell siphon that aquaponics and hydroponics growers use for regulating flood and drain cycling.
The Trickle Valve is a pvc coupling with specific cuts that allows the grower to manage the water drainage and filling through a single opening in the table. Water drains from the bottom of the valve and from the top. Lower releases water at bottom of table during and after water floods the grow bed. The upper weir assures a maximum height of the water level in the table.
This unique feed and drainage system eliminates the need for any, siphons, automatic solenoid valves, etc. which can plug or shut down due to power or mechanical failure.
This is a full set including two stand pipes at either 6 or 7" total height from the bottom of the tank. While it is possible to use this as a single fill and drain unit, we sell as a set because the extra stand pipe reduces the risk of debris getting stuck in the top of the drain and water overflowing. When using one stand pipe as a line to bring water in from a lower tank, the drain line is somewhat limited also. This makes it practical to use two Trickle Valves instead of one for any table setup.
Options are for a 5", 6" or 7" height. With a 9" deep trough we typically recommend 6". The pipe may be cut to shorter lengths if preferred.