[Code of Federal Regulations]
[Title 21, Volume 8]
[Revised as of April 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR1250.82]

[Page 675]
 
                        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 E--Sanitation Facilities and Conditions on Vessels
 
Sec. 1250.82  Potable water systems.

    The following conditions must be met by vessel water systems used 
for the storage and distribution of water which has met the requirements 
of Sec. 1240.80 of this chapter.
    (a) The potable water system, including filling hose and lines, 
pumps, tanks, and distributing pipes, shall be separate and distinct 
from other water systems and shall be used for no other purposes.
    (b) All potable water tanks shall be independent of any tanks 
holding nonpotable water or other liquid. All potable water tanks shall 
be independent of the shell of the ship unless (1) the bottom of the 
tank is at least 2 feet above the maximum load water line, (2) the seams 
in the shell are continuously welded, and (3) there are no rivets in 
that part of the shell which forms a side of a tank. A deck may be used 
as the top of a tank provided there are no access or inspection openings 
or rivets therein, and the seams are continuously welded. No toilet or 
urinal shall be installed immediately above that part of the deck which 
forms the top of a tank. All potable water tanks shall be located at a 
sufficient height above the bilge to allow for draining and to prevent 
submergence in bilge water.
    (c) Each potable water tank shall be provided with a means of 
drainage and, if it is equipped with a manhole, overflow, vent, or a 
device for measuring depth of water, provision shall be made to prevent 
entrance into the tank of any contaminating substance. No deck or 
sanitary drain or pipe carrying any nonpotable water or liquid shall be 
permitted to pass through the tank.
    (d) Tanks and piping shall bear clear marks of identification.
    (e) There shall be no backflow or cross connection between potable 
water systems and any other systems. Pipes and fittings conveying 
potable water to any fixture, apparatus, or equipment shall be installed 
in such way that backflow will be prevented. Waste pipes from any part 
of the potable water system, including treatment devices, discharging to 
a drain, shall be suitably protected against backflow.
    (f) Water systems shall be cleaned, disinfected, and flushed 
whenever the Commissioner of Food and Drugs shall find such treatment 
necessary to prevent the introduction, transmission, or spread of 
communicable diseases.

[40 FR 5624, Feb. 6, 1975, as amended at 48 FR 11432, Mar. 18, 1983]