675 IAC 20-3-7 Circulation systems

Sec. 7. (a) Every spa shall be provided with an approved type circulation system capable of turning over the entire spa water capacity in not less than thirty (30) minutes. (b) All circulation shall: (1) go through the spa filtration system; and (2) be chemically treated prior to injection into the spa. (c) A removable strainer or screen shall be installed upstream from all pumps. (d) Filters shall meet the following requirements: (1) They shall be capable of maintaining the standards of turbidity set by the Indiana state department of health. (2) They shall be provided with a means to safely release air that builds up in the filter tank. (3) Piping furnished with the filter system shall be capable of withstanding three (3) times the designed working pressure. (4) The suction side of the circulation system shall be tied and split hydraulically equally between the two (2) or more main outlets. Both branches shall have the same size pipe as the main outlet. (5) All filters and their components shall be accessible. (e) Air induction systems, when provided, shall: (1) prevent water backup; and (2) not introduce contaminants into the spa water. (f) Chemical feeder systems shall be provided, capable of maintaining a chemical residual and pH level in accordance with 410 IAC, the rules of the Indiana state department of health. (g) Operation and maintenance instructions, including a laminated pump curve or curves and conversion chart (psi to tdh) shall be provided for circulation system components.