Grohe 31251000 Pure Chilled and Sparkling Dual Function Faucet Chrome

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The right lever on the tap is used to mix hot and cold tap water as usual
The left rotary knob with integrated colored LED display regulates the carbonic acid content of the filtered and cooled water
Finished in GROHE Starlight chrome the tap has separate internal waterways - one for filtered water and the other for unfiltered water
Grohe 31251000 Pure Chilled and Sparkling Dual Function Faucet Chrome"