What is required for the cross connection of supply tanks not exceeding 660 gallons?

The requirement that supply tanks not exceeding 660 gallons must be on a horizontal plane is grounded in ensuring the safe and effective operation of the tanks in relation to one another. When tanks are located on the same horizontal plane, it helps to establish gravitational equilibrium, minimizing the risk of backflow or siphoning between the tanks, which can lead to cross-connection issues and potential contamination of the water supply.

Maintaining a uniform elevation assists in the proper management of water pressure and prevents any unintended flow from one tank to another, which is crucial in systems where supply integrity is paramount. By adhering to this guideline, installers can create a safer installation that aligns with the underlying principles of plumbing and mechanical codes intended to protect public health and ensure the functionality of the system.