§ 46.842. Design and construction of water tanks and mobile food facility water tanks.
(a) Requirement: enclosed system sloped to drain. A water tank shall be the following:
(1) Enclosed from the filling inlet to the discharge outlet.
(2) Sloped to an outlet that allows complete drainage of the tank.
(b) Requirement: inspection and cleaning port protected and secured. If a water tank is designed with an access port for inspection and cleaning, the opening shall be in the top of the tank and both of the following:
(1) Flanged upward at least 13 mm (1/2 inch).
(2) Equipped with a port cover assembly that is both of the following:
(i) Provided with a gasket and a device for securing the cover in place.
(ii) Flanged to overlap the opening and sloped to drain.
(c) “V” type threads: use limitation. A fitting with “V” type threads on a water tank inlet or outlet shall be allowed only when a hose is permanently attached.
(d) Requirement: tank vent protected. If provided, a water tank vent shall terminate in a downward direction and shall be covered with the following, as applicable:
(1) 16 mesh to 25.4 mm (16 mesh to 1 inch) screen or equivalent when the vent is in a protected area.
(2) A protective filter when the vent is in an area that is not protected from windblown dirt and debris.
(e) Requirement: inlet and outlet sloped to drain. A water tank and its inlet and outlet shall be sloped to drain, and a water tank inlet shall be positioned so that it is protected from contaminants such as waste discharge, road dust, oil or grease.
(f) Hose: construction and identification. A hose used for conveying drinking water from a water tank shall be all of the following:
(1) Constructed of safe materials.
(2) Durable, corrosion-resistant and nonabsorbent.
(3) Resistant to pitting, chipping, crazing, scratching, scoring, distortion and decomposition.
(4) Finished with a smooth interior surface.
(5) Clearly and durably identified as to its use if not permanently attached.
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