New York Laws
Title 3 - Sanitation and Health
170 - Water Supply.

ยง 170. Water supply. The owner shall provide proper appliances to
receive and distribute in such dwelling an adequate supply of water
obtained from the public water supply system or from a source approved
by the public health officer having jurisdiction at all times when the
building is occupied and during all hours and hot water between six
o'clock in the morning and midnight.