Our toilet vale busted and the pipe behind the bath tub busted. We got that fixed so we turned the water back on now we have low hot water pressure and no cold water upstairs. We can't find no more leaks. At first we thought air was in the lines so we waited then our basement flooded so we turned the water off. Everytime we turn the water on now the basement stays dry. But still no cold water upstairs and low hot water pressure. My adult son turned off alot of shut off water vales when finding the main shut off vale. Could he maybe shutting off something to the hot water heater or in the house to cause the hot water to be low or to stop cold water upstairs? Any advice is so appreciated, thank you.