Flow meter power control (solar heater risk mitigation)

Hi, I'm replumbing my pool after my pipes burst and have decided that instead of repairing the pipes inside my gas heater, I'm going to build a solar heater consisting of ABS pipe running back and forth across the roof of my pool shed. The design is pretty simple, but there is one thing I'm a little worried about, and that is the compression fittings on the ABS. If one of them fails while I'm not arround, I could imagine the pool draining below the skimmer level, and the pump running dry. I don't like the idea of this, so I'm thinking of tieing a flow meter into the power supply to the pump. If the flow drops to low, it would shut the power off to the pump. Of course at start up, I would need an override for this, and to make it more fun, I also want to put the pump on a timer...

The pump I'm using is a Whisperflo MFE-6. I don't have a flowmeter, or timer picked out yet, and I don't know whether there even is a power control system that can be integrated with a flowmeter (or one that has it already built in).

Has anyone ever integrated power management with a flowmeter? Can you tell me how you did it, and/or make a recommendation about the equipment?

I will appreciate all replies.

Thanks,

Paul