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Posted by HeatPro on September 02, 2008 at 10:33:06:
In Reply to: Re: larger to smaller pipes posted by HeatPro on September 02, 2008 at 10:26:39:
Which leads to the question of:
which boiler is it that has a 3/4 inlet and outlet?
the circuit length charts assume no resistance within the boiler. Some boilers, like copper-tube tankless heaters used for boilers have a high resistance in themselves requiring a high-head pump to pass water through the boiler and then work against the resistance of the circuit size and length with the remaining head.
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