Which statement about connecting PE piping is true?

• A. Barbed fittings with clamps are the only option.
• B. Fusion or barbed fittings with suitable clamps are used.
• C. Soldering is the preferred method for PE.
• D. PE piping cannot be joined once installed.

Answer: (C)

Joining PE piping relies on two reliable methods: heat fusion (butt fusion or electrofusion) that welds the pipe ends together into a continuous piece, and mechanical fittings designed for PE, such as barbed or compression fittings used with clamps. Soldering isn’t appropriate for PE because polyethylene is a thermoplastic that doesn’t bond with solder, and a solder joint wouldn’t be reliable. PE joints can be made in the field or in the shop when using the correct fusion methods or PE-compatible fittings, and the pipe can be cut out and rejoined if needed.