Connection to: heat pump, weight: 3.4 kg, with expansion tank connection: no, with automatic venting: no, with filling and draining tap: no, with pressure gauge: yes, with check valve: yes, with safety valve: no, with thermometer: no, with circulation pump: no, with thermal insulation: no, the heat pump compact installation contains all the necessary components for the hydraulic connection of the heating heat pump. The heat pump compact installation contains all the necessary components for the hydraulic connection of the heating heat pump.