La Marzocco Water Quality Test Kit - New Chloride Strip Included for 2017 For tasty coffee and a healthy espresso machine, La Marzocco introduces this simple to use water quality test kit. Kit contains 8 test strips: Total Hardness, Total Iron, Free Chlorine, Total Chlorine, pH, Total Alkalinity, Chloride Check and New Chloride Strip (TDS) Choosing the right water treatment is fundamental to ensure a longer lifespan of your equipment and to maintain brewing perfect espresso shots. This kit is for screening purposes only, and only tests some of the contaminants that can be found in water. The results of the kit can be interpreted with the La Marzocco Water Calculator at lamarzoccodotcom/water_calculator.