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8 <br /> Fiberglas Sumps <br /> Fiberglas sumps are available to facilitate condensation <br /> removal. The sumps are 4" deep, and must be installed <br /> between ribs along centerline of tank bottom and are limited to <br /> one sump per tank. Special installation procedures must be <br /> followed when installing tanks with sumps. <br /> See the current issue of Owens-Corning's installation instruc- <br /> tions (Owens-Corning Fiberglas publication 3-PE-6304). <br /> Sumps are available for all tank sizes and models. <br /> Tank wall <br /> 4" <br /> Fiberglas Manway Riser Pipe <br /> The Fiberglas manway riser pipe provides a non-corroding, t <br /> spacious, economical access from a manhole box and cover, <br /> (traffic areas require reinforced concrete road surface)down <br /> to the tank manway. Since the bottom is open, the manway FRP cylindrical pipe <br /> riser will fill with water as water surrounds it on the outside. Sump capacity.85 gallon <br /> centerline between ribs <br /> The manway riser pipe is available in lengths from 30" to 54" <br /> in,6" increments, and consists of a 48" diameter tube, open <br /> at one end, and a 221/2" centered square hole with rounded <br /> corners at the other end. <br /> A maximum of two manway risers may be used with tank <br /> sizes of 10,000 gallons and larger; only one riser is permitted Steel NPT Fittings <br /> with tank sizes less than 10,000 gallons due to possible Steel NPT fittings are available in 2", 4", 6", and 8" sues. The _ <br />' buoyant forces. 2" size is a full coupling, the 4", 6" and 8" sizes are half <br /> couplings. Two 2" fittings or two 4" fittings may be located <br /> Reinforced concrete 24"x 24" manhole box between the same two ribs perpendicular to the centerline of <br /> #5 rebar 8" OC both ways with cover(not supplied) the tank. All other fittings are located along top centerline of <br /> (2 layers) <br /> _ tank. Changes in location off the top centerline of the tank will <br /> void the U.L. label. <br /> 4 Two fitting <br /> Pea option <br /> >" <br /> --48" ID }'. gravel <br /> backfill —--——_ <br /> 9 .'':•standard;: <br /> 22" man A <br /> l <br /> y A I Tank I I <br /> 1 I top I I I <br /> 8„min. I I Plug I A ;l <br /> 2"x 4"x 3'min.or I i <br /> equivalent wood �— <br /> required to support <br /> riser <br /> L- ----J <br /> I Fiberglas layup <br /> #I II II <br /> 22&" sq. I -- --- I I I ► NPT half- <br /> (opening in riser) �y -� Rlib Plug coupling Rib Section <br /> AA <br /> II I r <br /> i <br /> Notes: Tank Fiberglas 2" or 4" NPT <br /> 1)Riser is not load bearing wall layup half-couplings <br />_ 2)Rebar mat must extend <br /> AA 4 ft.in all directions *"X'• Dimension on Double 2" Fittings Equals 5" <br /> from center of riser "X"Dimension on Double 4" Fittings Equals 9" <br />_ 'tl <br />