I have a utility sink in the basement. The previous owner had a habit of installing all the water fixtures backwards, so the "cold" line connected to hot and vice versa. Overtime, all the washers in the cold shut offs have started to fail. After replacing a few elsewhere, I'm stumped by the utility sink.
I have shutoff the hot water heater's hot line supplying the house. No other fixture can supply hot water, just a "shoosh" sound as I open it up.
However, at the utility sink, cold water continues to drain slowly, but never draining, from the faucet as I have the hot tap open wide and cold closed. I even closed the cold shutoff thinking the mixer in the faucet is failing to no avail.
It's run for over 30 minutes and drained several gallons of water, surely several times more than all the hot water piping in this house. This fixture is closest to the hot water heater at the bottom of the house.
Why do I get a continuous stream from the hot water only at this sink and nowhere else?