LIQUID RD/20, a double large-volume drinking bowl with double flap function on both sides. 60 l/min* water refilling from the patented HOSP “HD-SL” and valves ensure high, infinitely variable water refilling through regulation of the stainless steel pressure valve. G 3/4” pipe connection from below with special pipe guidance enables integration in a ring main system with water warmed by heaters. This achieves frost protection for the valves and drinking water in both the piping and bowl at low temperatures.