603.5.17, Potable Water Outlets and Valves, is hereby deleted in its entirety and the following provisions shall be substituted therefor:

Potable water outlets, freeze-proof yard hydrants, combination stop and waste valves, or other fixtures that incorporate a stop and waste feature that drains into the ground shall not be installed underground. Freezeless yard hydrants, meeting the requirements of ASSE 1057 (Freeze resistant Sanitary Yard Hydrants with Backflow Protection) shall be approved for use within the City limits of Topeka. These devices are to supply potable water without danger of damage to the hydrant due to freezing, to provide protection of the potable water supply from contamination due to ground water, and to prevent potential backflow by means of back siphonage with the installation of an approved atmospheric vacuum breaker meeting the requirements of ASSE 1052 (Performance Requirements for Hose Connection Backflow Preventers).