Professional plumbers utilize a variety of specialized products to seal pipe joints securely depending on the material and system type. For threaded metal and rigid plastic pipe connections, they frequently apply high-density PTFE tape or liquid pipe dope (thread sealant paste) to lubricate and fill thread gaps. For copper water supply pipes, they use lead-free solder and flux combined with propane torch heat to create permanent capillary sweat joints. In PVC and ABS drain systems, chemical solvent cement is brushed on to chemically fuse the plastic pipes and fittings together permanently. Additionally, rubber gaskets, compression rings, and wax rings are used for specific fixtures.
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