B13-7 is a compact DOUBLE TUBE solar station, completely premounted to be installed in solar circuit and capable of covering surfaces up to 26 m² of flat collectors or 20 m² of evacuated collectors. The station is equipped in the return section with a flow meter with a regulation range of 1-13 l/min, a drain tap, a GRUNDFOS UMP3 SOLAR 15-75 highefficiency exchanger, a safety unit consisting of a pressure gauge (0-10 bar) followed by a safety valve set at 6 bars, a filling tap, connections for connecting the solar expansion vessel and a blue ball valve with a check valve (20 mbar) and an integrated thermometer. in the outlet section there is a red ball valve equipped with a thermometer and integrated check valve and large degasser designed to eliminate air during the system startup phase as well as ensure correct operation over time.