The water heater in one of my parents units started to play up. A call to AO Smith and the use of a amprobe concluded that it was the lower element that had died. 45 minutes later and the use of a element wrench, hose and phillips screw driver a new element was in and service was resume as normal. The second bird was that I used the water to water the plants at the front of the house. Job done time for a fizzy ribena!