Then use two crescent wrenches, one to hold the valve body in place and the other to engage the nut, to tighten the nut another half turn. “When I replaced a toilet shut-off valve in my older ...

Photo 4: Hang a wrench near the shutoff Hang the wrench ... of the gas leak and that gas hasn't been leaking for long, shut off the valve and get out. But if you're uncertain of the source or ...