Robert Stephen Morton
Hey Rooster, what jensee is describing in part 2 is the washer worn down till it goes down past the seat, thereby when the tap is turned on pressure comes out because of build up but because the valve stem & part of the washer is down past the seat it vibrates or thumps until the valve raises past the seat & then he has pressure & flow.
This is almost always caused by home handymen reseating their own taps with handyman tools & over zealous turning off of the tap. In USA you call them Faucets.
Mr jensee should call a licensed plumber & consider Ceramic seats.
Bob
