Maxiflame LK 551 HydroMix M1 thermostatic mixing valve 35-65°C with G¾ x1 connection kitMaxiflame LK 551 HydroMix M1 thermostatic mixing valve 35 65C with G x1 connection kit The LK 551 HydroMix is a thermostatic mixing valve for domestic hot water and heating systems, designed to maintain a constant water temperature by automatically mixing hot and cold water via a thermostatic element. Model code 181454 is equipped with M 1 connections (male thread) and is supplied with connection kit 092053 G x 1 , which allows adaptation from pipes