If we blow a water pipe, we'll pay for both hundreds of litres of water along with clean-up costs. I'm looking at devices like the $540 Watercop to save me money and hassle. Watercop attaches to the water main on your house and is triggered by remote RF water sensors that can be placed anywhere. When triggered, it shuts off the main and stops all water flowing into the house. We would need a sensor in the attic, one next to the furnace, and two others where the main water supply enters the ground floor. The WaterCop I'm evaluating has a 3/4-inch valve and three RF Sensors. It's powered by 120V AC but I think you can make the thing work with a power adapter on 240V power in Ireland.