Snyder Industries 1100 Gallon ASTM XLPE Black Heavy Duty Vertical Storage Tank

The other part family at 1,100 gallons

This shell is sold under two different part families, and that is the first thing to understand about it. The 8120000N48 and the 1710000N48 are both listed at 1,100 gallons in the same 86 by 55 inch shape, both rated by their sheets for a specific gravity of 1.9, and they are listed at different empty weights, 210 pounds here and 180 pounds there. The sheets give both numbers and we print what they say; neither sheet explains the difference, so no page here invents a reason for it. What is on the sheet is the origin: this part number is listed out of Marked Tree, Arkansas, which for a plant east of the Rockies is often the shorter lane and the whole reason to buy this one rather than its stablemate. Beyond the family, the shape is the argument. At 55 inches the top of the shell is below shoulder height, so the manway is opened from the ground by anybody who can see over the rim and nobody schedules a platform to do it. The cost of that convenience is floor: an 86 inch circle does not pass a 36 inch doorway, so the route from the dock to the pad is measured before the order goes in, not after the tank is on the trailer. Under it, 9,174 pounds of water and 17,431 at the rating bear on the whole 86 inch floor, because a rotationally molded tank carries on its floor and nothing else, so the slab is poured to the concrete pad sizing guide, level and in full contact, inside a berm sized to the tank where the liquid is regulated. A short, wide tank is the least wind-sensitive shape in the range, which is exactly why people skip the bands on it. Do not: at 210 pounds empty it will walk across a slab in a gust. Black passes no light to the liquid and takes the ultraviolet that ages a white shell, and it hides the level, so the gauge is a sender. Run 1,100 gallons against your draw in the tank sizing calculator, and take the reserve and the freeboard from the tank sizing guide.

Two ways to spell a low, wide 1,100

Four part numbers, one flat shell. The 1710000N48 is the same shape and the same 1.9 rating from the other part family at a lower listed weight, and the 1710000C34 and 1710000C26 are the lighter-listed walls in that family, each rated as its own sheet says. Buy this one for the Arkansas origin and the heavy wall together. The comparison that actually matters on most jobs, though, is against the upright tanks: the 1831000C34 puts 1,000 gallons on a 60 inch circle at 89 inches tall, and the 1830200N40 puts 1,200 gallons on the same circle at 109 inches, both trading ceiling for floor. If your ceiling is the problem, this flat 1,100 is the only shape in the group that solves it.

Other makers in the running? 866-418-1777 will compare them honestly; Norwesco, Snyder, Chem-Tainer, Enduraplas and Bushman are all here, or price freight on this one.

A vented manway on a shell that is mostly lid height

• Vent: the listed 18 inch threaded, vented manway is the whole breathing path, and it sits 55 inches up where dust, wash-down spray and snow all reach it. It has to pass air out faster than the delivery pump pushes liquid in, so size it to the pump, keep the path clear, and run it outdoors on any liquid that fumes rather than letting it breathe into a closed room.
• Fill: down a dip tube to the floor. The drop is shorter here than in a tall tank, but a wide shell has a large free surface and splash-filling it foams a liquid across the whole of that surface.
• Headspace: freeboard for expansion at the 140 F / 60 C service limit, from the sizing guide. A wide tank hides expansion better than a narrow one, which is a reason to calculate the freeboard rather than eyeball it.
• Outlet: the outlet field on this sheet is the bare number 9. That is what the sheet lists and it is not a pipe size, so the draw-off connection is specified at order against the liquid you name, with the fitting, gasket and bolting matched to it.
• Service limit: 140 F / 60 C. Warranty: 3 year.

A flat tank gives the least suction head of any 1,100 in the range, so the pump placement matters more here than anywhere: put it below the take-off, keep the suction run short and level, and fit a low-level float so it stops before it draws air. The first valve stands on its own support off the pad with a flexible connector between it and the tank, because a wide shell moves across its floor as it warms and cools and a rigid pipe run will find that out. Keep the manway closed between deliveries, name the liquid on the wall, and put a light on the headspace band whenever the lid is off. In a freezing climate protect the valve and the first pipe; the shell takes ice from the top down.

Low ceilings, dense liquid, 1,100 gallons

Basements and pump rooms with pipe racks overhead, mezzanine floors, mobile skids and truck beds that cannot carry a tall tank, greenhouses under a low eave: those buy this shape, and the 1.9 rating is what lets them put a dense liquid in it. Whether cross-linked polyethylene is the right shell for that chemistry at all is the question the cross-linked versus high density polyethylene article answers, and it is worth reading before the order rather than after the first delivery. Water is far inside the rating, so the tank will hold it, but a fire reserve is a separate specification with its own sizing and freeze discipline, set out in the fire-water reservoir design guide.

Marked Tree, Arkansas, and why the class is 400

This is the one tank in its group listed at freight class 400 rather than 300, and the 86 inch base is the reason: a wide, light tank takes deck space out of all proportion to its weight, and freight class follows the space. It is listed out of Marked Tree, Arkansas, so the lane from the plant to a Mid-South or Midwest pad is short; the freight cost estimator prices it to your ZIP, with the listed price before freight. Two people and a strap under the body handle 210 pounds on level ground, forks under the body for anything else, and never a strap through the manway. Fill it with water to the manway, hold it, and look at the pad edge all the way round before the real liquid comes. On a tank this wide, check that the slab is still in full contact after the first fill, because a wide floor finds a low corner that a narrow one would have bridged. Put the tank's part number on the maintenance log the day it lands; five years on, nobody remembers which shell it is.