Recreation, Volum 56National Recreation Association, 1963 |
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Pàgina 418
STAN HEDWALL SWIMMING T POOL FILTERS The answer to public health hazards миы تو in your swimming pool سب نید THE " HEART " of any swimming pool , small or large , is its filtration system . Pools , like many human beings . have or may ...
STAN HEDWALL SWIMMING T POOL FILTERS The answer to public health hazards миы تو in your swimming pool سب نید THE " HEART " of any swimming pool , small or large , is its filtration system . Pools , like many human beings . have or may ...
Pàgina 419
developed and adapted for swimming pool use . It is now widely accepted that a properly designed and operated dia- tomite filter installation will give a sparkling and clean pool . Over sixty percent of all swimming pools built today ...
developed and adapted for swimming pool use . It is now widely accepted that a properly designed and operated dia- tomite filter installation will give a sparkling and clean pool . Over sixty percent of all swimming pools built today ...
Pàgina 420
... pool vol- ume through the filters in not more than three hours for public pools and not more than twelve hours for ... pool has two or more filters . W HAT is meant by " pool turnover " ? Every time an amount of water equal to the total ...
... pool vol- ume through the filters in not more than three hours for public pools and not more than twelve hours for ... pool has two or more filters . W HAT is meant by " pool turnover " ? Every time an amount of water equal to the total ...
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