(a) General rule.— Council may, by ordinance, require any owner of property to connect with and use a water system of the borough or municipal authority or a joint water board in either of the following cases:

1. (1) Except as provided in subsection (b), if the property owner's principal building is located within 150 feet of a water system or any part or extension of the system.
2. (2) If the property owner's principal building has no supply of water which is safe for human consumption.

(b) Exception.— A property owner who after July 16, 2012, is subject to mandatory connection under subsection (a)(1) shall not be required to connect to the water system in accordance with subsection (a) if all of the following conditions exist:

1. (1) The water system or part or extension of the system that is within 150 feet of the principal building was in existence on July 16, 2012.
2. (2) The principal building has its own supply of water which is safe for human consumption.
3. (3) Prior to July 16, 2012, the property owner was not required to connect to the existing system.