: I purchased a second floor condo. The condo. was winterized and all water was shut off. : The hot water heater was recently re-lit, however, the hot water pressure starts off well and then tapers off to a trickle or nothing at all. Could the problem be at the water supply line from the hot water heater? Thank you for your response.The problem may be the cold water supply valve at heater. It may be only cracked open a little if its a gate valve as it should be then it will require several complet turns to either be on or off, very often people only turn them a couple of turns, which results in what you describe.