ARM 37.115.1015. PIPING SYSTEM

(1) The piping system for any pool, spa, or other water feature shall be designed to reduce friction losses so that adequate flows are maintained in the piping system. (2) The piping system of the pool, spa, or other water feature shall be marked to identify filtered water, make-up water, waste water, vacuum lines, and heating lines and shall be marked to identify the direction of flow.