The hansgrohe Ecostat 1001 SL exposed shower thermostat is equipped with a thermostatic cartridge, a safety lock at 38°C and a backflow preventer. The thermostat also provides an Eco-stop button (limited flow rate at 10 l/min.) and a presettable hot water limitation. - flow rate 20 l/min. - DVGW NW-6509CM0449