Section R. 325.2161 - Water heaters and thermometersRule 61.
(1) A swimming pool owner shall ensure that a swimming pool water heater piping system includes an external bypass of the heater if the swimming pool is larger than 3,000 gallons in volume or if the water heater is not designed for at least 100% of the required recirculation flow rate.(2) A swimming pool owner shall not install a heating coil, pipe, or steam hose in a swimming pool.(3) A swimming pool owner shall provide an automatic shutoff device for the heater that maintains pool water temperatures not to exceed those specified in R 325.2194.(4) If a swimming pool has a pool water heater, then the owner shall provide a fixed thermometer at a point in the piping before the pool water heater to measure the temperature of the flowing water.(5) A swimming pool owner shall ensure that a thermometer meets all of the following requirements: (a) Is graduated to indicate temperature to the nearest 2 degrees Fahrenheit in the operating range.(b) Is located to be read easily.(c) Is located where it will not be subject to damage.(d) Is located and installed in compliance with R 408.4001 et. seq.Mich. Admin. Code R. 325.2161
1979 AC; 1983 AACS; 2001 AACS