I have thermostatic valves here which costed me something like 80€. It's not as fancy as the Grohe. It looks like a classic two knobs system except the right o

I have thermostatic valves here which costed me something like 80€. It's not as fancy as the Grohe. It looks like a classic two knobs system except the right one controls temperature with gradation in degrees while the left one controls flow. Better temperature control doesn't have to cost an arm.