The domestic and drinking water supply shall be distributed through a piping system entirely independent of any pipe system conveying another water supply.
The water service pipe of any building shall be installed in accordance with the ordinances of the Village of Massapequa Park for water supply.
All plumbing fixtures shall be provided with a supply of water sufficient for flushing to keep them in a sanitary condition. They may be flushed through an approved flushometer valve and shall be adjusted to prevent the waste of water. Where flushometer valves are used, they shall be supplied with water under sufficient pressure and volume at all times to properly flush the water closets. Where this is impossible to accomplish with the supply direct from the street water main, flushometer valves are prohibited unless they are supplied from a house tank of approved capacity.
No plumbing fixture or device shall be supplied directly from a water supply system through a flushometer or other valve unless such valve is installed in a manner such as to prevent any possibility of polluting the water supply.
No plumbing fixture, device or construction shall be installed which will provide an interconnection between a distribution system of water for drinking and domestic purposes and a drainage soil or waste pipe so as to permit or make possible the backflow of sewage or waste into the water supply system.
Water supply control shall be installed in accordance with the ordinance of the Village of Massapequa Park for water supply.
All water supply pipes for a plumbing system shall be of Type K or L copper tubing. Water supply pipes and fittings of materials or combinations of materials of an equal or better class, from a corrosive or health viewpoint, may be used after approval in writing by the Building Inspector. No pipe or fittings that have been used for other purposes shall be used for distributing water.
All concealed water pipes, storage tanks, flushing cisterns and all exposed pipes or tanks subject to freezing temperatures shall be efficiently protected.
Wherever a check valve is installed on the cold-water supply pipe between the street main and the hot-water tank, there shall be installed on the hot-water distributing system a suitable relief valve.