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Media , inch minimum depth of seed and .nlve,m deeLe
<br />gravel over under drain,
<br />Effective sand size 0,3 to 0,5 mm Gravel graded and )laced
<br />as per Sec, 7802, e, 12 inches freeboard above sand.
<br />f. Sight glass on wase Air rleae valve at
<br />high point of filter, ti. P uenuate racilitiee th ,-lesegc, control
<br />for adding coagulaeiag chemicals ahead of filteri—
<br />Filter Piping valved for seoarate filter backwashieg and filtration,
<br />2. SEC. 7803 - DIATOMACEOUS EARTH FILTER
<br />4/4
<br />a, Filter rate - two gpm/sq, ft„, maximum of two and one half (2)
<br />gpm/sq, ft, if continuous feeding of filter aid ma)eriel provided for,
<br />b, Pools 2000, sq, ft, or more and heavily used pools must have continuous
<br />feeding of filter aie 7iate,:ia1 at a minimum rate ce Iteds/eq. ft,
<br />of filter area over e i hour period, Individual kim-filter units
<br />not allowed on pools 2000, sq, ft, or more,
<br />c. Materials adequate to withstand normal use,
<br />d_ Provision for conveniene filter cleaning,
<br />e. Pressure-type units envio must deliver full regeiree xe
<br />feet head loss and sixty percent (60%) or more of :21•1
<br />70 feet head loss,
<br />3 &!C, 7804-OTHER FiLTERS (Sufficient factual date shad he
<br />the Health Deoartment for aurov:,?.1er dtsant;rcr:
<br />M, SEC, 7774-1,1ADIM POOL- CAPACITY GALS
<br />1, Maximum depth at deep point, 18" at side walls, -12"
<br />_4( 2, 'eater recirculated at two-hour or loss turnover rate, aee031-
<br />3' Chlorine residual of at least 0,4 ppm at all times when in Ly.:4e
<br />Main drain for discharging pool water provided,
<br />N.. SEC, 7 -791-:1ATER SUPPLY
<br />No direct connection of water system with pool water. (No hose filling or
<br />direct make-up unless protected by vacuum breaker)..
<br />Convenient hose bibs equipped to V..13,'s to enable hcs:ng down of pool area.:
<br />SC-7,- 7799,
<br />Water system under remit or from source approved by t nea1.7J1 Decartment,
<br />If water supply from well sanitary construeiion eest ee. Health Departmeqr
<br />approval,
<br />luarded jet anele drinkile fountains provided se all noels ezpeet where
<br />provided in a.ciaet SEC 7793,
<br />ty
<br />L,H -12
<br />9/61
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