Applying liquid thread seal or pipe dope correctly requires careful preparation to ensure a clean, leak-free joint. First, clean the male and female threads thoroughly to remove any old sealant, dirt, oil, or debris. Next, use the built-in brush or a small applicator to apply a thin, even coat of thread sealant around the entire circumference of the male pipe threads, starting from the second thread back to avoid contaminating the inner pipe. Screw the fitting together securely by hand and tighten it with a wrench to the recommended torque specification, wiping away any excess paste that squeezes out of the joint before putting the system into service.
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