(a) Every dwelling, house, or other building requiring the use of water must be supplied from the water mains of the water board through a separate service, provided that there is a permanent water main immediately in front, rear, or on either side of the premises.

(b) If no water main is existent in the manner described, a temporary service may be laid from and connected to the nearest available water main until a permanent water main is installed, when such service must be disconnected from the temporary source and reconnected to the permanent water main within 30 days from the date that water is available in the permanent main. Such disconnection and reconnection shall be made by and at the expense of the owner of the premises supplied, and under the supervision and subject to the written approval of the director.