| Re: Copper VS IRON pipe Good morning, Above ground I would opt for copper. Galvanized Iron pipe can, over time, build up iron and mineral deposits that can cut down the flow. Under ground, (with the exception of a slab, in which case I would use copper) Iwould recomend PVC. PVC is less expensive and will outlast galvanized or copper pipe. Hpe this answers your question. Cheers, Tom |