Thermostatic shower mixer by Grohe and some more manufacturers fixes this problem, and also 1) when someone shuffles the toilet on the same pipe, 2) when you us

Thermostatic shower mixer by Grohe and some more manufacturers fixes this problem, and also 1) when someone shuffles the toilet on the same pipe, 2) when you use hot water from a heating tank on the cold pipe. https://duckduckgo.com/?t=ffab&q=grohe+thermostatic+shower&ia=web https://duckduckgo.com/?t=ffab&q=grohe+thermostatic+shower&i...