Grohe Wax Thermo-Element Thermostat (00798000)

The Grohe wax thermoelement is built around the diverter valve section. The diverter valve is a directional water mechanism found only on combi boilers that allows hot water to be redirected to radiators or taps depending on the situation. One of the reasons combi boilers are more popular in the market is that they can provide hot water and heat without the need for a cylinder.