The Grundfos UPM3 FLEX AS 25-70 130 Pump is a high efficiency A Rated circulation pump and a reliable work horse for water underfloor heating systems. The lightweight design and compact size makes installation simple even in tight spaces. The UPM3 is an advanced high-efficiency circulator pump suitable for a wide variety of applications from boilers to underfloor heating systems. UPM3 is controlled via a digital signal to ensure the optimum operation
