when I turn on the hot water taps the pressure goes down to a trickle after about 5-10 seconds (from full pressure when first turned on). the cold taps have normal pressure, its just the hot taps. a mate said that I need to change the valves in the taps but I'm thinking why would both the hot water taps go at the same time? they were installed years apart. there is a slight drip coming from the boiler but not enough to cause loss of pressure on this scale.
any ideas anyone?