i have no plumbing knowledge but need help to solve this problem. My hot water tap/faucet in my bathroom has developed an extremely low pressure flow. Sometimes this decreases to merely a dribble when turned on making it near impossible to even collect water in your cupped hands. At other times the pressure will flow at half the rate it used to below this problem developed but never at the proper rate. The cold water flows perfectly in the house as does the water out of the other hot water tap in the kitchen downstairs. Can anyone help me with a suggestion of possible and solution to this problem?