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Posted by Dan on November 03, 2010 at 09:23:13:
In Reply to: Re: No backflow valve posted by HeatPro on November 02, 2010 at 19:30:46:
Thanks HeatPro--I will definitely be adding a backflow valve into the system while I have it down doing the other repairs.
: It is usually code to have one when the cold water feed line is hard-piped to the boiler. If the boiler is hose-filled with a disconnected hose after fill, there's no need, as water won't backflow to the cold feed line then.
: They might still be not there for boilers installed before the code change. It's a good idea to add one to keep the water system from boiler water, especially if antifreeze is added.
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