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XERXES DWT -11 Appurtenances and Accessories Fiberglass Manway Riser (optional) A manway riser provides access to the manway from grade and prevents backfill material from covering the manway or equipment mounted on manway. Two risers may be used on tanks greater than 4,000 gallons capacity. Only one riser may be used on smaller tanks. Additional risers are available up to 6 -ft. in height. 'L 24" Square .""r ' 42" • 48" Dia. " fManway Extensions (optional) Tank entry in high ground water conditions and/or deep burials may require manway extensions. When bolted to the manway, it provides a watertight access to the tank interior. Available in 22" 30" and 36" diameters in two foot lengths or more. Extensions include nuts, bolts, washers, and a gasket. i AFRP Holddown Straps (optional) Straps are used when a tank requires anchoring. The straps provide the link between the tank and the owner supplied anchoring hardware. For more information on straps and their use, refer to Xerxes Installation and Warranty Manual. Nominal Outside Number Buoyancy Load Tank Size (gallons) Diameter Required (per strap, tbs.) 550; 1,000 4' 2 4,200 2,500; 3,000; 4,000 6' 2 18,000 6,000 6' 4 18,000 6,000 8' 2 25,000 8 to 12,000 8' 4 25,000 ``10 to '{5,000 10' 4 25,000 20,000 10' 6 25,000 25,000 10, 8 25,000 30,000 10' 10 25,000 314" FH] Duplex Service Fittings (optional) Duplex service fittings allow for the placement of two service connections in one location. Fittings are placed astride the tank's centerline in any standard fitting location. Available in 2, 4" and 6" NPT sizes. (Note: Dimension D is 6 -inches for 2" fittings, 12 -inches for 4" and 6" fittings.) i I I i 1 1 I I 1 1 I I p I I A h Secondarily Contained Service Fittings (optional) Secondarily contained service fittings, typically a 4" NPT within a 6" NPT, allow the tank to be connected to a secondarily contained piping system. 534"