Place an adjustable wrench around the body of the shut-off valve. Then place a second wrench around the compression nut. This is found on the bottom of the valve, surrounding the copper pipe.
Hold the wrench around the valve body while tightening the compression nut in 1/8 turns. If the nut is fully tight but the leak continues, the supply hose nut will also have to be tightened.
Hold the wrench around the valve body and place the second wrench around the supply hose nut. Tighten this nut--again in 1/8 turns--until the leaks stops.
Things You Will Need
- 2 adjustable wrenches
- Never try to over-tighten either nuts, as the treads can sheer off. Only tighten them to the extent where the leak stops.