Description
The working theory is similar to a flush lavatory, with a float ball valve inside the assistant tank to control water filling, the assistant tank is usually installed on top of the main solar water heater tank, with a stainless pipe connecting each other, when float ball descends, the valve connecting with float ball opens to let in city water, when the main tank is full and water rise in the assistant tank, the float ball rises to shut the valve and water refill stops.
