The MES standard single lever swivel sink mixer is suitable for use with the STIEBEL ELTRON SNU 5 and SNU 10 compact storage water heater. The open-vented design of the SNU requires one of the four styles of STIEBEL ELTRON taps to be fitted with the product. The MES sink mixer has a three-star WELS rating, with a maximum flow rate of 8 litres per minute.