Join Date: Oct 2009
Location: Montreal, quebec
DIY semi-automatic water changer
I could never trust myself when it comes to filling a tank with a Python. I'm sure there will come a time when, in a moment of distraction, a number of gallons of water would wind up on the floor (never owned a Python myself but my understanding is that it does not shut off automatically). So this is my plan for a semi-automatic water changer. Simple really: a hose attached under the kitchen sink would act as a gravity fed syphon for emptying, and as a float switch controlled system for filling.
Emptying the tank would just be a matter of opening a series of valves and allowing water trapped in the hose to flow by gravity. The quantity of water emptied is controlled by the length of the rigid pipe assembly hanging over the aquarium edge. A check valve close to the drain would prevent grey water from entering the system.
Filling level would be controlled by a float switch_directly attached to the end of the hose_ connected to a solenoid valve (normally closed) plumbed to my kitchen's water supply. I would use self-piercing valves to connect my system to the existing copper pipes. I am thinking of putting the electrical system on a timer to act as a failsafe in case the float switch sticks. Obviously the system would be controlled by a master switch.
The whole assembly sleeps under the kitchen sink and comes out only when necessary.
Given my very limited engineering skills I would welcome any comments or improvements.