It is, nevertheless, a very important matter that the condition of the water should be given serious consideration—many bathers soon contaminate a water supply. Besides this fact, the water which is originally supplied to the pool (city water supply or river water supply as the case may be) should be filtered so that when the pool is filled to the brim you will be able to recognize a 10 cent piece lying flat on the bottom in the deepest place.
During the last few years, before cleaning the water in the pool was given much consideration, a person diving was not visible below the surface, which condition was responsible for a number of deaths either by accident or cramps, as the case might be, and when the body remained on the bottom of the pool it was not missed, in some instances from 12 to 18 hours. The possibility of this condition is entirely eliminated when a proper method of filtration is used. After the pool is first filled with clean, sparkling water, it should be circulated through the filter and back into the pool by using a pump and motor, which remain in constant duty when the pool is in service, thereby eliminating from the water in the pool all of the impurities accumulated, which will be caught in the filter and eventually washed to the sewer. The vacuum system used in connection with the same pump and motor is frequently used with the view of eliminating heavy suspension and cuticle which may adhere to the bottom of the pool and not be readily carried off by the general circulation. In many cases the hot water tank is eliminated and an automatic water heater is used with automatic gas attachment.
The systems which we have made a thorough and complete investigation on have been equipped with a most thorough and up-to-date apparatus, which is the Everson filter equipment. Illustrations of the pool shown herein has the very finest equipment possible to obtain. The water is filtered so thoroughly that it will magnify to such an extent that the pool does not look to be more than a foot deep, whereas in reality it is over 8 feet in depth.
Specification for the Supply, (Filtered and Sterilized Water) Circulation and Drainage System for Swimming Pool
General:
The following specification covers a "Standard" sized swimming pool (30x60') and the apparatus required for the complete system consist of the following:
Circulating Pump the suction end of which shall be connected to the two circulating returns at the deep end of pool. This pump will also be used for vacuum cleaning of the pool and for this purpose the inlet and discharge shall be by-passed as hereinafter specified.