Caleffi Series 279HE circulation group 3/4" F connections with delivery and return connection - UPM3 PUMP - 1–13 l/minCaleffi Series 279HE solar thermal circulator 3 4" F connections with flow and return connection UPM3 PUMP 113 l min The Caleffi Series 279HE circulation group has the function of regulating the temperature inside the boiler and is used on the primary circuit of solar systems . Safety devices are inserted in the group in order to guarantee regular monitoring of the circuit. This version has a flow and return connection and is equipped with a Grundfos
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Caleffi Series 279HE circulation group 3/4" F connections with delivery and return connection - UPM3 PUMP - 1–13 l/min