Harry,

It will be used to connect to a water alarm circuit which in turn is
connected to a water solenoid.
When I do my 20% water changes I have plumbed in a system that, via
carbon/water filters will fill up the tank directly from the mains by
opening a stopcock. the solenoid is there to stop the water when it
reaches a certain level (governed by the height of the rods) which shut
the water off, just in case I forget to turn the tap off. This is
because the water flow will be quite slow and it will take some time and
I donot want to be wating for the tank to fill up..


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