Section 9-202.11 - Water Storage Tank(A) Every MOBILE FOOD ESTABLISHMENT shall be equipped with a gravity or pressurized water storage tank.(B) The water storage tank shall be sized as specified in § 5-103.11, but no smaller than the following:(1) A MOBILE FOOD ESTABLISHMENT that serves BEVERAGES or FOOD or reheats prepared FOODS shall have a water storage tank with a capacity of at least 38 liters (10 gallons) for FOOD EMPLOYEE handwashing;(2) A FOOD pushcart shall have a water storage tank with a minimum capacity of 19 liters (5 gallons) for handwashing; or(3) A MOBILE FOOD ESTABLISHMENT that prepares FOOD or BEVERAGES on the unit shall have a water storage tank with a capacity of at least 151 liters (40 gallons) for handwashing, UTENSIL washing and SANITIZING purposes.(C) The water storage tank shall be constructed and maintained as specified in Part 5-3 and shall be: (1) Constructed of at least 14 gauge metal or other durable FOOD grade material;(2) Provided with a glass-sight gauge graduated to read water volume in gallons or liters;(3) Equipped with a threaded opening on the inlet line or on the tank with a locking device for flushing and SANITIZING the tank; and(4) Flushed and SANITIZED as specified in § 5-304.11.Wis. Admin. Code Department of Health Services § 9-202.11