NovaTherm™ Grundfos Manifold Pump & Mixing Valve Unit - UPM3PRODUCT CODE : ESS UFH T4 G 210 The NovaTherm Grundfos Pump and Mixing Valve Unit is the very best quality pump setup to be the brains and brauns of your underfloor heating system. The unit itself has a built in mixing valve unit that can be adjusted to allow for temperatures between 35C 65 C. It's designed to be compact and lightweight in order to connect up to a standard UFH manifold without requiring any extra brackets and or support. The unit