General description Low Pressure Boiler Water Test Kit, Parameters; P-Alkalinity, Chloride & pH. Test recommended to maintain boiler water within the desired level of quality when treating with LiquitreatCombitreat are as follows: A. P-Alkalinity - Recommended Limits: 100-300 ppm as CaCO3 B. Chlorides - 200 ppm maximum as Cl-. C. Condensate pH 8.3-9.0 D. Hotwell temperature > 80°C