Snyder Industries 4100 Gallon HDPE Vertical Liquid Storage Tank with ASTM Certification

Most of a tanker under a barn eave

Ten feet of base under 100 inches of height is the shape for a low building or an eave, and the shape that needs the least strapping, because 51,291 pounds on a 120 inch circle sits low. A water-rated wall is for water and nothing heavier; the full-density wall is for concentrated acid; a 1.5 wall is the middle, sized for brine, fertilizer solution and coagulant as delivered and every water application, with margin. Rotationally molded polyethylene tanks are sized to ASTM D1998, and the way a tank meets the density it is rated for is in the wall; the HDPE tank wall thickness guide explains the sizing logic and why the headspace is where a wall ages, and the freeboard sizing guide works out the usable volume once thermal expansion is accounted for. The floor is wide, so the pad matters more than the height: an engineered slab in full contact under the whole 120 inch circle, per the concrete pad sizing guide, because a tank this wide spans any hollow in a gravel base and cracks there when full. The tank sizing calculator tells you whether 4,100 gallons covers the draw, and the tank sizing guide covers days of supply.

The low 4,100, and the sizes beside it

The 7360000 tanks stand the same 4,100 gallons on a 102 inch base at 130 inches, 30 inches taller, for a site with height and less floor, the C37-BLACK in black for sun. The 7421100 tanks are the other low tanks on this base, 4 inches taller, the N40 in cross-linked resin for oxidizers at 4,000 gallons and the C34 the general grade at 4,300.

Torn between two rows? Call 866-418-1777 with the liquid and the ceiling height, or ask for a quote on both and compare the freight.

The fittings list

• Access: 18 inch threaded, vented manway, 100 inches up; filled by hose, tote pump or truck through a dip tube, vented outside on anything that fumes, and size the vent for the delivery pump.
• Outlet: specify the bulkhead fitting for the liquid when ordering; a flexible connector at the bulkhead, an expansion joint in the run, and a valve on its own support off the slab.
• Service limit: 120 F.

The white wall shows the level in daylight; fit a low-level float switch so a pump never runs dry. Set the pump lower than the outlet so gravity primes it, keep the manway shut against vapor loss, and shade the tank if the liquid is light-sensitive. In a cold climate the outlet valve and the first run of pipe are insulated or drained; the body takes ice from the top down without harm.

The truck at the manway

A delivery truck's pump can push air out faster than a stock vent can pass it, so the vent is sized for the unload rate or the fill goes through a dedicated top bulkhead with its own vent line. The fill pipe runs to the floor so the liquid does not free-fall and foam. The first tanker into a new tank is a supervised job, slab edge and outlet fitting checked as it fills, and each delivery after it is logged with its date and strength.

What goes in it

Coagulant, brine and fertilizer solution at plants and farms with a low roof, well storage for a community system under an eave, a rain cistern under a large roof, stock water at a big operation, and a fire reserve of the kind the fire-water reservoir design guide describes, where the low center of gravity counts. One liquid per tank, labeled.

Getting it off the truck

At 120 inches across the 8200000N43 ships as oversize freight at a lane rate rather than a class rate; the freight cost estimator prices the move to your ZIP, and the price on this page is before freight. A forklift with long forks sets 774 pounds on the slab, and the slab is checked flat before the tank lands. Fill it to the manway once, hold it, and check the outlet fitting before the pump goes on. The first fill is the only cheap time to find a problem, so do it in daylight with someone watching the base.