Used on a system with boiler tank without gas (instant) and no problems found several months of use. The settings are accurate, there is a step to limit the flow, it encourages not to put water thoroughly in savings, and a notch to limit Temperaturea 38 ° C making it n ' there is no danger even for a child. The valves are easy to turn even if they are smooth. I do not put 5 stars because I use it only for less than a year ... but it is the Grohe normally no worries.
