Python Gravel Cleaner

[Eel Boy]

How does it work i can't figure it out

 

[canarsie11]

Uses water pressure

 

[smithrc]

same effet that pulls air in to the filter output - venturi.

mains water passes over the end of the suction hose and sucks the tank water out.

then you close the valve and the water goes the other way and into the tank.