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.
 
Description
Connections 130mm x 1″ 1/2 BSP Thread ~ n.b. BSP sizes don’t match up with what you measure on the scale of a ruler (1″ 1/2 BSP =47.80 mm)
 
Specifications
Maximum head: 70 dm
TF class: 110
Pump housing: Cast iron
Impeller: PES 30% GF
Maximum ambient temperature: 70 °C
Maximum operating pressure: 10 bar
Port-to-port length: 130 mm
Pumped liquid: Water
Liquid temperature range: 2 – 110 °C
Selected liquid temperature: 60 °C
Density: 983.2 kg/m³
Power input – P1: 2 – 52 W
Mains frequency: 50Hz
Rated voltage: 1 x 230 V
Maximum current consumption: 0.04 – 0.52 A
Enclosure class (IEC 34-5): IP44
Thermal protec: ELEC
Energy (EEI): 0.20