Identifying the molecular differences and mechanical properties resulting from the three different manufacturing methods of cross-linking (Engel, Silane, and Radiation methods).

Evaluating and specifying the appropriate connection technology, such as cold expansion fittings (F1960), ASTM F1807 crimp systems, or ASSE 1061 push-to-connect fittings (like SharkBite).

Deciphering the exact ASTM, CSA, and NSF standards governing PEX systems: ASTM F876/F877, NSF/ANSI 61 & 372, CAN/ULC S102.2.

Calculating thermal expansion rates for PEX runs and designing loop, offset, or guide supports to handle the expansion and contraction of plastic pipe under hot water temperatures.