WAC 246-215-05345
WAC 246-215-05345. Numbers and capacities — Mobile food unit tank inlet (FDA Food Code 5-303.13)
A mobile food unit water tank inlet must be:
(1) Three-fourths inch (19.1 mm) in inner diameter or less; and
(2) Provided with a hose connection of a size or type that prevents its use for any other service.