The swimming pool or spa shall be equipped with a chlorinator or other continuous disinfectant feeder which meets the following applicable requirements:

(1) All chemical feeders shall be approved by the national sanitation foundation.

(2) When compressed chlorine gas is used, the following additional features shall be provided:

(a) The chlorine and chlorinating equipment shall be in a separate, well-ventilated room. Such rooms shall not be below ground level and shall be provided with vents near the floor which terminate out-of-doors. The door of the room shall not be open to the swimming pool, and shall open to the outside.

(b) Chlorine cylinders shall be anchored to prevent their falling over. A valve stem wrench shall be present on the chlorine cylinder so that supply can be shut off quickly in case of an emergency. A valve protection hood shall be kept in place except when the cylinder is connected.

(c) During accidents or interruptions of the water supply, the chlorine feeding device shall be designed so that leaking chlorine gas will be conducted to the outdoors.

(d) The gas mask designed for use in a chlorine atmosphere and of a type approved by the mine safety and health administration (MSHA) or the national institute of occupational safety and health (NIOSH) shall be provided. In addition, replacement canisters shall be provided and a record shall be kept of gas mask usage to ensure that the mask will be serviceable when needed. The gas mask shall be kept in a closed cabinet, accessible without a key, located outside of the room in which the chlorinator is maintained.

(e) Chlorination equipment shall be installed and operated by or under the supervision of personnel experienced with installation and operation of such equipment.

(f) Chlorine use must also meet all local or other state requirements.

(3) A change in method or type of disinfection must be approved in writing by the regulatory authority.