CONTAINED IN VOL. 08.04, 2018 Defines electrofusion polyethylene fittings for use with outside diameter-controlled polyethylene pipe, covered by Specifications D 2513, D 2737, D 3035, F 714, F 2623, F 2769 and crosslinked polyethylene (PEX), covered by Specifications F 876 and F 2788/F2788M.