PEX sizes one inch and smaller installed horizontally shall be supported at intervals not to exceed how many inches?

PEX sizes one inch and smaller installed horizontally shall be supported at intervals not to exceed how many inches?

• A. 24 inches
• B. 32 inches
• C. 16 inches
• D. 40 inches

Answer: (B)

When you run PEX horizontally, you must secure it so it won’t sag or move and put stress on fittings from gravity or thermal changes. For PEX sizes up to 1 inch, the maximum allowed spacing between supports is 32 inches. This keeps the pipe firmly in place along long runs, reduces the chance of movement at connections, and accounts for the pipe’s flexibility. Spacing tighter than that (for example, 16 inches) would be more than necessary for most installations, while spacing farther than 32 inches (like 40 inches) risks sag and stress.

When you run PEX horizontally, you must secure it so it won’t sag or move and put stress on fittings from gravity or thermal changes. For PEX sizes up to 1 inch, the maximum allowed spacing between supports is 32 inches. This keeps the pipe firmly in place along long runs, reduces the chance of movement at connections, and accounts for the pipe’s flexibility. Spacing tighter than that (for example, 16 inches) would be more than necessary for most installations, while spacing farther than 32 inches (like 40 inches) risks sag and stress.