I just purchased a home (13 yrs old). The water out of our taps is coming out cloudy unless we trickle the tap. The cloudiness clears up in less than a minute, so we're pretty sure it's air and nothing more sinister, but our pipes are also quite loud if we use the shower or the laundry tub (at the top and bottom of the system respectively). I was going to flush the system from top to bottom to try and solve the cloudiness problem, but I'm concerned that the loud noise is possibly hammering which I understood was caused by a lack of air cushioning.

Any advice would be appreciated before I bring in a plumber. Thanks!