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Additional Ae-Wall not supplied by O/C TAN**of the tank. Tubes are usually Tank Accessories but are available from furnished in standard lengths petroleum equipment —flared at one end, straight distributors. cut at other. The straight end should be cut on a 450 angle The tube slips inside the fill and located 4" above the C riser pipe to permit product to bottom of the tank. be dropped near the bottom FIII Tube Clearance V 45- 4'MINIMUM OFF TANK BOMM (6'MINIMUM FOR 12'DIAMETER TANKS) Tank Bottom Sumps Tank Bottom sump Tank bottom sumps are avail- TANK BOTTOM DEFLECTOR PLATES able to facilitate condensation INTERIOR WALL removal. The sumps are 4" deep and must be installed } s under a manway cover that ,,DEEP has a center fitting. Only oneEXTERIOR WALL r sump may be used per tank. Special instruction procedures (OCT publication 3-PE-6304) TANK BOTTOM SUMP must be followed when install- �S'DIAMETER ing the tank with bottom sump. Sumps are available for all double-wall tank sizes and Ladder models. 22'MANWAY ON 6',8'&10'DIAMETER TANKS ONLY FRP SLIP LUG Tank Ladders Fiberglas®tanks are available with a factory installed carbon steel ladder. Attached to the 914'RUNG(TYR) tank bottom with FRP mounting lugs, the ladders are retained 2-112" at the top with FRP slip lugs yB" on the trunk of the manway CARBON STEEL LADDER i to allow for contraction and expansion of metal ladders. �-- (Manway and ladder are sold 2'TVP FRP UNIVERSAL I separately.) MOUNTING LUG Tank ladders are not recom- mended on tanks 1,000 gallon capacity and smaller. Because of limited space, the ladders interfere with tank entry. PROBE DRAWSTRING Probe Drawstring As an optional accessory, O/C TANKS can provide a factory 1 11 installed "drawstring" at the u reservoir monitoring fitting to assist in positioning liquid r sensors at the bottom of the annular space. Fill Tube—for 4" fittings Fill tubes for 4" fittings are 24