|
1„
<br />b, Media - a0 inch minimum depth of sand and :1.0 ench etnimum depth
<br />gravel over under drain.
<br />c. Effective sand size 0,3 to 0,5 mm, d.. Gravel graded and. °laced
<br />as per Sec, 7802. 2, 12 inches freeboard above sand.
<br />f. Sight glass on waste Clis j,g2 -; ie, _A,g. Air release valve at
<br />high point of filter. Adequate facilities with dosage control
<br />for adding coagulating chemicals ahead of filter-
<br />i., Filter Piping valved for separate filter backwashieg and filtration,
<br />2. SEC. 7803 - DIATOMACEOUS EARTH FILTER
<br />a. Filter rate - two gpm/sq, ft., maximum of two and half (2A-)
<br />gpm/sq, ft. if continuous feeding of filter aid material provided for,
<br />Pools 2000, sq. ft, or more and heavily used pool!, eust have continuous.
<br />feeding of filter aU. iatc:iai At a minimum rate et: 0,1 eeds/so, ft.
<br />offilter area over a hour period.. Individual e'eim-filter nits
<br />not allowed on poola 2,000 sq, ft, or more,
<br />Materials adequate to withstand normal use,
<br />Provision for convenient filtee cleaning.
<br />Pressure-type units puma must deliver full eeeeire pressure at 60
<br />feet head loss and sixty eercent (60%) or more cf tuch caneeity at
<br />70 feet head loss,
<br />3. SEC, 7804 -OTHER FILTERS (Sufficient factual date shal, be subl,atted to
<br />the Health Department for aooroval or dancroval,
<br />M. Si 7774 -'1ADING POOL- CAPACITY GALS.
<br />
<br />2,,
<br />Maximum depth at deep eoint, 18" at side walls, 12".
<br />Uater recirculated at two-hour or loss turnover rate, 3E3,7331,
<br />Chlorine residual of at least 0,4 ppm at all times when in aee.
<br />Main drain for discharging pool water provided,
<br />
<br />14
<br />
<br />NQ SEC, 7 97-wATER SUPPLY
<br />No direct conneetion of water system with pool water, (No hose filling or
<br />direct make-up unless protected by vacuum breaker),
<br />
<br />,4 2. Convenient hose bibs equipped to V,B,'s to enable hosing down of pool area-
<br />SEC. 7799
<br />,!later system under permit or from source approved by t -qe Paalth Department,
<br />If water supply from well, sanitary construction nt.st cet Health Department
<br />approval.
<br />
<br />K14 . Guarded jet angle drinking fountains provided all pod; except where
<br />provided in adjacent living euarters,. SEC.. 7793,
<br />EJL, -12
<br />9/61
|