My water was fine but my hotwater heater was leaking and needed to be replaced,I had a plumber replace it and since I have had low water pressure low hot water and rusty water,the plumber came back and said he flushed the faucets and it was much improved,I was at work when he did this and he left this comment on a note on the door,I still have low pressure,rusty water(I never had before) and hot water is slow to heat up can you help?