I have just replaced my gas Hot Water Unit which died on Christmas Day!.Coincidently (?) my next door neighbours are also replacing their unit which carked it over Xmas.� The distance between our 2 HW units is not more than 6 feet.� Our properties are two quite separate houses. My unit has a� July 1986 manufacture date, the neighbours unit is 1988.� Both units overflow with water if the mains water is turned on.� � Is it possible that there is a problem with the water supply which has caused both units to die?� There is a recurring problem with water breaking through the road surface on the road outside of our properties – this was repaired by the water company again yesterday. � Am I just being paranoid -is it possible that something has occurrred to damage both units?� Any thoughts, comments etc would be appreciated.� � Many thanks Shine