as a kit, frost-proof, when closed, metal parts in contact with the medium made of gunmetal, suitable for installation in the shell and for retrofitting in a finished external wall, special installation length for particularly thick walls, inner top part for quick opening, discharge rate 40 l/min (1 bar), installation depth max. 530 mm, with functional aerator for automatic emptying, with hose coupling for common plug-in systems, operating temperature max. 90 °C, EPDM seat seal, PN 16, dead space free, matt chrome-plated operating handle with blue tag