Originally Posted by
wolf72
This is indeed worrying....how often do airliners clean the tanks where drinking water is stored. What measures are taken to ensure filters (if there are any) are consistently replaced?
In the US, the minimum disinfecting and sampling frequencies are defined in 40 CFR 141, Subpart X, Table B-1.
Frequency can vary by airline choice, but at a minimum it may conform to the following:
DISINFECT: At least 4 times per year, AND, SAMPLE: At least once per year.
-OR-
DISINFECT: At least 3 times per year, AND, SAMPLE: At least twice per year.
-OR-
DISINFECT: At least 2 times per year, AND, SAMPLE: At least four times per year.
-OR-
DISINFECT: At least 1 time per year, AND, SAMPLE: At least twelve times per year.
https://www.ecfr.gov/cgi-bin/text-id...41_main_02.tpl