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Flow regulating valve necessary?
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zepfan
Member Posts: 397
We need to replace a tankless heater coil on a 20 year old oil fired boiler, residential The manufacturer shows a flow regulating valve on the line line for the cold water inlet to the heater. Is this necessary, and if so what is the purpose of it? The reason I ask is there isn’t one currently, and it seems to have been ok without it for 20 years. The piping does have an existing adjustable three way mixing/tempering valve that was recently replaced. Thanks to all
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