Snyder Industries 16500 Gallon HDPE Vertical Liquid Storage Tank with ASTM Certification

Sixty-nine tons of water on a twelve foot circle

Full of water, the 5380000N43 puts 137,610 pounds on a 142 inch circle, and a rotationally molded floor bears on the whole pad, so the pad is what matters: an engineered slab bearing under every inch of the floor, per the concrete pad sizing guide, screeded flat, with no pipe trench or drain crossing under it. An empty tank gets strapped, because 257 inches of empty polyethylene is a sail, and the straps go slack once it is full. The certification is to ASTM D1998, which is a wall-thickness standard at heart; the HDPE tank wall thickness guide explains the sizing logic and why a wall this tall is inspected from the top, in the headspace, and the freeboard sizing guide works out the usable volume once thermal expansion is accounted for. The tank sizing calculator tells you whether 16,500 gallons covers the draw, and the tank sizing guide covers days of supply.

Grades on the 142 x 257 inch tank, and the sizes beside it

The N45 is the certified 1.9 wall, 500 pounds heavier, for ferric at strength and the heavy brines; the C26 is the uncertified 1.9 wall and the C34 the general grade, both at this tank's weight, and the C126 is the light-wall water tank at 3,000 pounds. The 3030100C26 holds 15,000 gallons on a 165 inch base 73 inches shorter, and the 3030000N49 holds 18,800 gallons on that base at 242 inches.

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.

Openings as shipped

• 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. Order a large outlet if the tank is a fire reserve.
• Access: 18 inch threaded, vented manway, 257 inches up, reached from a fixed platform with a rail.
• Service limit: 120 F / 48 C.
• Listing: ASTM certification.

A tank this big breathes hard as it fills, empties and warms, so size the vent to the pump-out and fill rates, screen it, and do not rely on the manway default. Fit a sender read at ground level so nobody climbs for a number. In a cold climate the outlet valve and the first run of pipe are insulated or drained; at this volume the body freezes slowly and from the top down.

Unloading without a spill

The truck's pump outruns the manway vent, so size the vent for the unload rate or give the fill its own top bulkhead and vent line. The fill pipe runs to the floor so the liquid does not free-fall and foam. The first delivery into a new tank is watched from start to finish, with the slab edge and the outlet fitting checked as the level climbs, and each delivery after it is logged with its date and strength.

In service

Community and municipal water storage where the certification has to be on file, a fire reserve of the kind the fire-water reservoir design guide describes, irrigation storage on a large property, and brine, fertilizer solution or coagulant as delivered at the 1.5 rating. One liquid per tank, labeled.

Freight and unloading

At 142 inches across and 257 inches long on the deck the 5380000N43 is oversize freight (NMFC 156600) on a flatbed at a lane rate, with an escort on most routes; the freight cost estimator prices the move to your ZIP, and the price on this page is before freight. A crane sets 5,100 pounds upright on the slab. One water fill to the manway, a hold, a look at the outlet fitting, and the certification goes in the project file. The first fill is the only cheap time to find a problem, so do it in daylight with someone watching the base.