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Posted by HeatPro on January 26, 2007 at 23:18:45:
In Reply to: Re: back flow value for indirect water heater posted by jim on January 26, 2007 at 21:27:44:
Could the lack of a back flow valve have any adverse effect?
It might do a little; but an indirect water heating coil has a high resistance, so less flow goes through than would cause a large problem.
It is a more secure way to pipe using a flow control valve for each zone (an indirect heater is a zone.)
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