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Thread: Home maintenance normally overlooked
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Old 12-20-2022, 07:39 AM
elevatorman elevatorman is offline
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Quote:
Originally Posted by bob47 View Post
It's only a closed system if there's a backflow preventer between the municipal supply and your house. Ours does not have one. Ours only becomes a closed system when we shut the main supply valve in the garage.
Since 1985 water meters have a built in back flow preventer. It is in the code. Water companies in the US have replaced most of the older meters.