i have a water boiler in my bathroom, which is heated with electricity. Its quite old boiler(10 years) and its heater has been replaced with a new one about 3-4 months ago. Few days ago i had an water pipe accident so i had to turn water down and so i turned my boiler off. When the plummer fixed the pipe i switched the boiler on again. And when i turned water tap to wash my hands i experienced an electrical shock. First i didnt beleive it but then i wanted to be sure and touched the water tap again and im sure i experienced electricity and it wasnt pleasant. It seems like the only time i can get electricity is when the water is flowing. Now i cant figure out why it is happening and im not too keen to use the water tap in my bathroom. Can anyone explain and give some advice?