The water pressure in our house is so poor that we cannot run any water when either the dishwasher or washer is running. If water is running in the house, the shower will not work, only the tub. We replaced the hot water tank last year. Can you help us? Thanks, The Bells
If you are on a well system adjust the pressure switch.
If you are on city water first check with the water department, if that fails you can install a pressure pump to increase pressure.
Jack