robust all-metal design, high operational reliability thanks to plastic cartridge and integrated nozzle bore pre-filter, compliant with DIN EN 12541, with internal flush pipe connector for flush pipe 18 x 200 mm, flush flow: 0.3 l/s, flow pressure 0.8-5 bar, flush volume adjustable 1-6 l, all visible components made of brass DIN EN, noise class II, certification mark PA-IX 9892/II, DIN DVGW certified