Plumbing repipe saves significant wait time for hot water

I have a friend who is an architect in Fargo, N.D. He has lived in his house for about a decade and has always had plumbing problems, such as low flow from hose bibs and sinks, poor pressure at showers, and long hot-water delivery times.

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http://www.contractormag.com/residential-plumbing/plumbing-repipe-saves-significant-wait-time-hot-water