Built-in bypass valve for easy

Electrode cleaning solution is not a substitute for rinse solution or storage solution — use each in its proper role for complete electrode care

TDS and Temp

leak-resistant seal protects during storage and transport

or anyone committed to the cleanest possible shower water throughout their entire home

Hanna Instruments HI7004L 4.01 pH Calibration Buffer Solution, 500mL Bottle whole house filter with cartridge Built-in bypass valve for easyThis buffer value is widely used in water purification plants, in the food industry, and wherever the pH is expected to be slightly acidic. Traceable to NIST standards Available in bottles or sealed sachets, complete with or without a certificate of analysis. Multiple resolutions for better accuracy. NIST Traceability Standardized using a pH meter calibrated by means of two standard solutions prepared from NIST standard reference materials. Color