Which joint method is commonly used to join PVC-U pipes?

Which joint method is commonly used to join PVC-U pipes?

• A. Mechanical Joints
• B. Solvent Welding
• C. Push fit
• D. Fusion Welding

Answer: (B)

Solvent welding is used with PVC-U because it chemically fuses the pipe ends and fittings to create a single, seamless plastic joint. The process applies a primer and solvent cement to the prepared surfaces; the solvent softens the PVC so the pipe and fitting can be pressed together. As the solvent evaporates, the softened plastic interlocks and re-hardens, forming a leak-tight connection that behaves like a continuous piece of pipe. While other methods like mechanical joints, push-fit, or fusion welding exist, solvent welding is the standard for PVC-U in most plumbing since it provides a durable, reliable seal for typical household pressures.

Solvent welding is used with PVC-U because it chemically fuses the pipe ends and fittings to create a single, seamless plastic joint. The process applies a primer and solvent cement to the prepared surfaces; the solvent softens the PVC so the pipe and fitting can be pressed together. As the solvent evaporates, the softened plastic interlocks and re-hardens, forming a leak-tight connection that behaves like a continuous piece of pipe. While other methods like mechanical joints, push-fit, or fusion welding exist, solvent welding is the standard for PVC-U in most plumbing since it provides a durable, reliable seal for typical household pressures.