I had to move a gas furnace from an interior wall to an exterior wall (for ventilation). I redid about 10 feet of black pipe so that the pipe ends under the exterior wall for the furnace. Altogether, about 20 pieces of pipe and fittings. I put a pressure gauge on the system, pumped it up to 11 psi, and waited 10 minutes. It was down to 9.5 psi. Some of the fittings I did had a leak when I sprayed them with soapy water. I'm going to take it all apart and put it back together. I used a paste on the threads of the pipe before assembling them. When I put it back together, should I use more paste or more torque on each joint in order to not have a leak? If it's more torque, about how hard should I twist them? It's 1/2 black pipe. I'm using a BF pipe wrench (24).
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