okay first things first, there is a white valve near the bottom of my hot water tank. it has one white knob and a black knob. the white knob–when turned–drips small amounts of water on the ground. the black knob does nothing when turned. however, the white valve has been leaking for about 1 week now and its covering my floor with water, and it will not stop leaking. i don’t know what the problem is–its not the T&P valve–can anyone help? thanks
The heater might have sediment in the bottom and when you opened it some got between washer and seat, either take valve out are go and buy a cap at Plumbing supply house made to cap up the valve. For as the other handle on it you would have to send me a pic. before I could tell you what it was, It could be and openning for a return line.