Twenty thousand gallons in a single polyethylene tank
The Snyder 3030000C37 is the largest vertical tank on this site: 20,000 gallons of white high density linear polyethylene, 165 inches in diameter and 242 inches tall, weighing 5,000 pounds empty. It carries a 1.9 specific gravity wall, which rates it for 316,920 pounds of contents where the same volume of water weighs 166,800, and its outlet is a 3 inch stainless steel bolted fitting under a 22 inch threaded, vented manway. A tank this size is a piece of civil engineering, and the description below is written for the engineer specifying it.
Talk to a person first? 866-418-1777 reaches a tank specialist, not a call center; or see freight to your ZIP and add the 20000 gallon tank to your cart above.
The foundation is the project
At its rating this tank loads its 165 inch footprint to 316,920 pounds; with water alone it is 166,800. Either number is a reinforced slab designed for the site's soil, with the tank's ring load and the slab's bearing checked by an engineer, and with a surface flat enough that a twenty foot tall shell stands plumb. The tank should be anchored or restrained against wind when empty, and it needs a crane on delivery day. Confirm the volume with the tank sizing calculator and the days-of-supply math in the tank sizing guide; at this scale, two smaller tanks on two smaller slabs are sometimes the better plan, and the smaller white tanks in the same family are covered in the 2,000 gallon, 500 gallon and 300 gallon buyers guides for the day tanks that usually accompany a bulk tank like this one.
The 165 inch family
| Part | Gallons | Diameter x height | Empty weight |
|---|---|---|---|
| 3030000C37 (this tank, 1.9 SG) | 20,000 | 165 x 242 in | 5,000 lb |
| 3030000C37-BLACK | 20,000 | 165 x 242 in | 5,000 lb |
| 3030000C26 | 20,000 | 165 x 242 in | 5,500 lb |
| 3030000N49 | 18,800 | 165 x 242 in | 5,500 lb |
All four are one mold. The black version is the same tank for water that must not grow algae in the sun. The 3030000C26 adds 500 pounds of resin to the same shell, and the 3030000N49 is a heavier-wall tank as well, listed at 18,800 gallons because a thicker wall takes up volume inside the same mold. Between white and black the choice is about light; between 5,000 and 5,500 pounds the choice is about the liquid's density and the years the tank will stand in the sun.
Still deciding between these? Freight to your ZIP often settles it; the wider tanks ship differently. Or call 866-418-1777 and we will walk the table with you.
Outlet and manway
- Outlet: 3 inch polypropylene fitting with a stainless steel bolted flange, at the base.
- Access: 22 inch threaded, vented manway, 242 inches up; the vent must be sized for the fill and draw rates of a tank this size.
- Service limit: 120 F / 48 C.
Twenty feet of head over a 3 inch outlet is a lot of pressure at the flange, which is why the outlet is bolted rather than threaded; pipe it through a flexible connector and an expansion joint, support everything off the slab, and re-torque the flange bolts after the first full fill. Instrumentation at this height is a hydrostatic sender at the outlet or a radar unit on the manway, never a climb.
What a 20,000 gallon polyethylene tank does
As a water tank it is a fire reserve for a commercial site or a small community, sized under NFPA 22 as the fire-water reservoir design guide describes, or an irrigation and process reserve. As a chemical tank with the 1.9 wall, it is bulk storage for a treatment plant's caustic, ferric or alum, the tanker's full load in one vessel.
Delivery day
A 165 inch diameter tank that is 242 inches long on the deck is oversize freight (NMFC 156600) on a flatbed with a lane rate; the freight cost estimator prices the lane to your ZIP, and the listed price is before freight. Book the crane for delivery day, have the slab cured and surveyed, and plan a staged water fill with a hold at each stage before any chemical is ordered.
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 3030000C37.
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.
