18,800 gallons in black, ASTM certified, twenty feet tall
The Snyder 3030000N33 is a black high density linear polyethylene vertical liquid storage tank, 165 inches across and 242 inches tall, holding 18,800 gallons at 5,000 pounds. Its wall is rated for a specific gravity of 1.35, or 219,509 pounds of contents against 156,792 for water, it is sold with ASTM certification, and the black wall keeps light out of stored water so it stays clear of algae. A 2 inch outlet, a 24 inch manway wide enough to enter for cleaning, and it ships as oversize freight on a permitted load.
Is this the right 18800 gallon tank? Call 866-418-1777 with the liquid, the site and the ceiling height, or get freight to your ZIP and add it to your cart above.
Seventy-eight tons of water on a fourteen foot circle
Full of water, the 3030000N33 puts 156,792 pounds on a 165 inch circle, and a rotationally molded floor bears on the whole pad, so the pad is what matters: an engineered slab in full contact under the entire floor, per the concrete pad sizing guide, screeded flat, with no pipe trench or drain crossing under it. Strap it before it is filled, because 242 inches of empty polyethylene is a sail, and the straps go slack once it is full. The certification is against ASTM D1998, and the way a tank meets it is in the wall; the HDPE tank wall thickness guide explains the sizing logic and why a wall this tall is inspected from the top, in the headspace. The freeboard sizing guide works out how much of the nominal volume is usable once thermal expansion is accounted for. The tank sizing calculator tells you whether 18,800 gallons covers the draw, and the tank sizing guide covers days of supply.
Snyder's largest verticals
| Part | Gallons | Diameter x height | Empty weight |
|---|---|---|---|
| 3030000N33 (this tank, black, 1.35 SG, ASTM certified) | 18,800 | 165 x 242 in | 5,000 lb |
| 3030000C137 | 20,000 | 165 x 242 in | 5,000 lb |
| 5380000N39 | 16,500 | 142 x 257 in | 5,100 lb |
The 3030000C137 is the same shell rated for 20,000 gallons in the general grade, for water. The 5380000N39 stands 16,500 gallons on a 142 inch base 15 inches taller, for a site with a smaller pad.
Comparing across brands too? Call 866-418-1777; we carry Norwesco, Snyder, Chem-Tainer, Enduraplas and Bushman and will say which one fits, or price the freight first.
Ports and manway
- Outlet: 2 inch, at the base; a flexible connector between the bulkhead and hard pipe, an expansion joint, and the valve supported off the slab. For a fire reserve a larger outlet is specified at order.
- Access: 24 inch manway, 242 inches up, reached from a fixed platform with a rail.
- Service limit: 120 F / 48 C.
A tank this size moves a great deal of air as it fills, empties and warms in the sun, so the vent is sized for the pump-out rate and the fill rate, not left at the manway default, and it is screened. Fit a sender read at ground level so nobody climbs for a number. If winters freeze, wrap or drain the outlet valve and the first pipe run; at this volume the body freezes slowly and from the top down.
Day-to-day duty
Municipal and community water storage, a fire reserve of the kind the fire-water reservoir design guide describes, irrigation storage on a large property, and brine or fertilizer solution within the 1.35 rating where the certification has to be on file. One liquid per tank, labeled.
From the plant to your site
At 165 inches across and 242 inches long on the deck the 3030000N33 is a permitted oversize load (NMFC 156600) on a flatbed with escorts; the freight cost estimator prices the lane to your ZIP, and the listed price is before freight. A crane sets 5,000 pounds upright on the slab. Fill it to the manway once, hold it, check the outlet fitting, and keep the certification paperwork with the project file. Write the fill date on the manway with a paint marker; it answers the first question anyone asks about a tank.
Freight and documents
Ships from: Washington Court House, OH. LTL freight is quoted to your ZIP with the freight cost estimator or by phone at 866-418-1777. The listed price is before freight.
Technical drawing (PDF) for Snyder Industries 3030000N33.
See this tank
Interactive 3D model with live fill. This tank has an interactive 3D model built to its manufacturer dimensions. Rotate it, and set a fill level to see how much liquid it holds at any height. Open the 3D view on the product photo above. Download the 3D model (GLB).
Ready to order?
Add it to your cart at the top of this page, get LTL freight to your ZIP, request a written quote, or call 866-418-1777. The listed price is before freight.
