(4) Vacuum cleaners, either built-in suction cleaners or portable suction
cleaners, are used for cleaning pool bottoms or walls. The discharge wastes are
emptied into the scum gutter or walk drain.
(5) The water in indoor pools should be maintained between 70F and 78F
and be about 5F cooler than the air temperature. A heater controlled by a thermostat is
recommended. The heater should be able to warm all or part of the recirculating water
and have a fixed thermometer in the recirculation line at the heater outlet and another
thermometer near the pool outlet. Figure 1-1 shows the location of the heater.
(6) A rate-of-flow indicator, reading in gallons per minute, should be
installed on the pool return line. The purpose of this device is to show the rate of
recirculation and backwash. The indicator should be capable of measuring flows at
least one and one-half times the normal flow rate. It should also be easy to read and
accurate within 10 percent of the true flow of the pool.
BATHHOUSES AND SHOWER FACILITIES
a. Bathhouses. A bathhouse should be provided next to each swimming pool.
The bathhouse should consist of dressing rooms, clothing storage facilities, toilets, and
showers. Floors should be made of nonslip material and have coved corners and
intersections between floors and walls. All facilities should be kept clean. Floors should
be scrubbed daily and disinfected with a 50-ppm chlorine solution as needed to control
fungi. Floors should be well drained with no pooling of water. Wet vacuuming should
be used if floor drains are not adequate.
(1) Dressing rooms. Floors should slope about one-quarter of an inch
per foot toward drains. Walls and partitions should be made of smooth, easily
cleanable, and impervious materials; walls and partitions are to be without open
cracks or joints. Surfaces should be painted. Dressing compartment partitions
should stand at least 10 inches above the floor or rest on continuous raised
masonry or concrete bases at least 4 inches high. Lockers should be well
ventilated and rest on 4 inch high solid masonry bases or on legs, with the bottom
of the locker at least 10 inches above the floor.
(2) Showers. One showerhead should be provided for every 30 persons of
each sex. The total number of showerheads is based on this figure and the maximum
bather load. All showers should be provided with plenty of soap and hot water, and
shower valve arrangements must totally prevent the accidental scalding of bathers. A
central automatic mixing valve is recommended. If only tempered water is supplied, it
should have a temperature of 90F to 110F. Showers should be positioned in the
bathhouse so that bathers must pass through the showers on their way to the pool.