Abstract: A water flow detector comprised of a check valve and parallel flow detection loop in which flow can be measured by monitoring the pressure differential as the difference between the water supply line pressure at the tee on the inlet side of the check valve (high pressure side) and the low pressure being at the tee connection on the downstream or outlet side of the check valve. The proportional water flow in the loop acts on a float which position is detected by optical and electronic means and enables the recognition of very small flows (small leaks) triggering an alarm to signal the leak.

Abstract: A water flow detector comprised of a check valve and parallel flow detection loop in which flow can be measured by monitoring the pressure differential as the difference between the water supply line pressure at the tee on the inlet side of the check valve (high pressure side) and the low pressure being at the tee connection on the downstream or outlet side of the check valve. The proportional water flow in the loop acts on a float which position is detected by optical and electronic means and enables the recognition of very small flows (small leaks) triggering an alarm to signal the leak.