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<br />Media 20 inch minimum .:epth of sand a. I P nch ri ri dero:h
<br />gravel over under drain,
<br />Effective sand size 0,3 to 0,5 mm. do Gr2ve1 graded and placed
<br />as per Sec, 7802, e, 12 inches freeboard above sand
<br />Sight glass on wast 6Ls.,;:.p. io, _ g, Air re leas v3lv9 at
<br />high point of filter, h, ideouate facilities wth dosage control
<br />for adding coagulaing chemicals ahead of filter.
<br />Filter piping valv:d for seoarate filter backwashing and filtration,
<br />
<br />SEC, 7803 - DIATOMACEOUS EARTH FILTER
<br />a, Filter rate - two gpm/sq, ft„ maximum of two and one half (24)
<br />gpm/sq, ft, if continuous feeding of filter aid material Provided for.
<br />b. Pools 2,000 sq, ft, or more and heavily used pools must have continuous
<br />feeding of filter ai ats.Aal at a minimum rate of 0,1 tidsAq ft.
<br />of filter area over 7 ;:/1 hour period, Individual :skim-filter inits
<br />not allowed on pool3 2,000 sci ft, or more,
<br />co Materials adequate to withstand normal use,
<br />do Provision for convenient, filter cleaning,
<br />e, Pressure-type units DUMn must deliver full require pressure at 60
<br />feet head loss and sixty percent (60%) or more of such capacity qt
<br />70 feet head loss,
<br />
<br />UNI:im..10=11111•041
<br />•••••••••••••••••
<br />3. SEC, 7804-0THER FILTERS (Sufficient factual date shaL be sOmitted to
<br />the Health Department fcr anroval r di3approvat
<br />IC SEC, 7774-1'A)ING POOL- CAPACITY GALS,
<br />Maximum depth at deep point, 131 at side walls, 12",
<br />•
<br />2. 'iater recirculated at two-hour or less turnover late FEC. 33L
<br />Chlorine residual of at least O-) ppm at all timEs whh Ln e,
<br />Main drain for discharging pool water provided.
<br />SEC 7797-T1ATER SUPPLY
<br />1. NO direct connection of water systva with pool wuier. No hose filiing or
<br />direct make-up unless protected by vacuum breaker),
<br />20 Convenient hose bibs equipped to V,B,9 s to enablc hoo ng ,Jowil of nool area
<br />SEC,' 7799,
<br />Water system under permit or from source approved by t;-e Health Del)artment,
<br />If water supply from well, sanitary construction oust ..eet Health Department
<br />approval,
<br />_K
<br />_x
<br />x 4. Guarded jet angle drinking fountains provided sA all pools, except where
<br />provided in adjacent living quarters, 3E0, 7798,
<br />E.H„ -12
<br />9/61 44_
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