The city of Spearfish, S.D., will replace deteriorating 107-year-old redwood pipes that carry water to its hydroelectric plant with a modern product: high density polyethylene pipes. The plant ...
United Poly Systems, LLC recently became the first manufacturer to achieve NSF International certification to UL Standard 651A for polyethylene electrical conduit pipe, according to a press release.
United Poly Systems 1” coiled Schedule 40 plastic conduit is among UPS’s first pipes to be certified by NSF International to UL 651A. Photo credit: United Poly Systems, LLC. United Poly Systems 1” ...
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