[Code of Federal Regulations]
[Title 21, Volume 8]
[Revised as of April 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR1250.42]

[Page 706]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 1250_INTERSTATE CONVEYANCE SANITATION--Table of Contents
 
      Subpart C_Equipment and Operation of Land and Air Conveyances
 
Sec. 1250.42  Water systems; constant temperature bottles.

    (a) The water system, whether of the pressure or gravity type, shall 
be complete and closed from the filling ends to the discharge taps, 
except for protected vent openings. The water system shall be protected 
against backflow.
    (b) Filling pipes or connections through which water tanks are 
supplied shall be provided on both sides of all new railway conveyances 
and on existing conveyances when they undergo heavy repairs. All filling 
connections shall be easily cleanable and so located and protected as to 
minimize the hazard of contamination of the water supply.
    (c) On all new or reconstructed conveyances, water coolers shall be 
an integral part of the closed system.
    (d) Water filters if used on dining cars and other conveyances will 
be permitted only if they are so operated and maintained at all times as 
to prevent contamination of the water.
    (e) Constant temperature bottles and other containers used for 
storing or dispensing potable water shall be kept clean at all times and 
shall be subjected to effective bactericidal treatment as often as may 
be necessary to prevent the contamination of water so stored and 
dispensed.