Approved Source. A facility shall be served by water from an approved public water supply. If an approved public water supply is not available, a private water supply may be accepted if it is approved by the local jurisdiction in which the program is located or a private certified vendor to be submitted with an initial licensure application. Adequacy. The water supply shall be adequate in quantity and delivered under sufficient pressure to satisfactorily serve all fixtures in the facility. Hot Water Temperature. Hot water accessible to residents shall be blended externally to the hot water generator, by either individual point-of-use control valves of the anti-scald or thermostatic mixing valve type, to a maximum temperature of 120°F and a minimum temperature of 100°F at the fixture.