Uponor announces the vast majority of its ProPEX engineered polymer fittings, lead-free brass sweat and threaded adapters and larger-diameter Uponor AquaPEX tubing (all up to 2”) are now listed to UL 1821 and ULC/ORD-C199P for use in AquaSAFE residential multipurpose fire sprinkler systems. This new listing allows more design options and material cost savings for AquaSAFE systems and provides the most comprehensive offering of fittings and cross-linked polyethylene tubing for multipurpose fire sprinkler systems from a single manufacturer.