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Old 11-24-2011, 12:43 PM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is offline
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Join Date: Mar 2005
Location: metro NYC
Posts: 44,032
Here's a cute little piece of work. There is someone out there who likes to build above-ground manifolds with standard zone valves, with poly pipe leading from valve outlet to under the ground. And of course, no backflow (maybe a swing check in the basement plumbing)

The addition of AVBs is my own, since I was tired of looking at them, and have little other use for them. It brought the system into genuine toxic-rated code compliance, for not too much money.

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