Expanded version of Flow Constriction thing 4774539 that also provides a funnel to route the water flow under the grow bed.

Aquaponics systems using autosiphons often need to have the waterflow rate tuned. Ball valves are a poor tool for doing this. This constrictor allow you to easily adjust the flow rate.

This is no different from https://www.thingiverse.com/thing:4774539 except that it allows the attachment of a funnel to the outlet. This funnel allows the waterflow to be sent to under the rocks so as to reduce splashing and subsequent algae buildup. Use of the funnel is completely optional.

This version is only sized for 1" or 30mm PVC pipes. PVC adapters can be used to fit other size pipes. Please see the instructions on how to assemble the constrictor. The basic system is a flow outlet (either 1" or 30mm) and a flow knob. The flow knob is attached to the flow outlet with either a #4 or m3 machine screw.

Optionally the funnel and splash guard can be used. The funnel comes in 1" and 30mm versions. The funnel is attached to the flow outlet with 2 self tapping screws (either #4 x 3/8 or M3x10mm).