R 325.2138 Flow controls; rate-of-flow indicators.

Rule 38. (1) A swimming pool owner shall provide a valve for regulating the rate of flow through a swimming pool in the recirculation pump discharge piping. (2) A swimming pool owner shall provide a rate-of-flow indicator on the pump discharge piping before or after the filter. (3) A swimming pool owner shall ensure that a rate-of-flow indicator meets all of the following requirements: (a) Is the proper size and design for the pipe and system on which it is installed. (b) Has a durable scale that is graduated in gallons per minute. (c) Is sized to operate as close as practical to the midrange of the indicator at the design recirculation flow rate. (d) Is installed where it is readily accessible for reading and maintenance. (e) Is installed with straight pipe upstream and downstream from the indicator to any fitting or restriction in accordance with the manufacturer's recommendations.