Barrier PEX (often referred to as PEX-Al-PEX) uses a layer of aluminum, not copp...

		nate_meurer on Sept 22, 2023 \| parent \| context \| favorite \| on: Lead poisoning causes more death, IQ loss than tho... Barrier PEX (often referred to as PEX-Al-PEX) uses a layer of aluminum, not copper. A far more common type of barrier PEX uses a low-permeability polymer coating.