Duplicate Main Water Supply Line
I’m wondering about burying a second duplicate (backup) water main in a new construction. The mains water supply pipe is at the road, about 200′ from the house and the house supply will be buried 6′ deep. I expect we’ll use PEX and the material cost of the of pipe is trivial. I assume the there little additional cost to putting it in the same trench. I’m wonder whether conditions that are likely to cause the first pipe to fail will also affect the second – i.e., would this be a reliable replacement? There will be a PRV, backflow preventer, and meter installed at the road. If you recommend the duplicate pipe, would you also recommend running it through the foundation (penetrating the insulation and another potential leak, etc.) or just plug the duplicate pipe off near to the foundation to be dug up if it’s ever needed? Thanks!
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