The heavy-wall 20,000 gallon tank
The Snyder 3030000C26 is a 20,000 gallon vertical liquid storage tank in white high density linear polyethylene, 165 inches in diameter and 242 inches tall, weighing 5,500 pounds empty. That is 500 pounds more resin than the standard 3030000C37 from the same mold, with the 1.9 specific gravity rating that puts its maximum contents at 316,920 pounds against 166,800 for water. It is the biggest polyethylene tank on this site and the thickest wall on that mold, for the bulk chemical or water reserve that has to stand outdoors for decades. A 3 inch outlet, a 22 inch threaded, vented manway, and a 3 year warranty.
Want it on your site? Get LTL freight to your ZIP, add it to your cart above, or call 866-418-1777 and a tank specialist will confirm the fit.
The foundation is the project
At its rating this tank loads a 165 inch footprint to 316,920 pounds; with water alone it is 166,800. Either is a reinforced slab designed for the site's soil by the method the concrete pad sizing guide lays out, with the ring load and the bearing checked by an engineer, and flat enough that a twenty foot shell stands plumb. The empty tank is anchored against wind before the first fill, and delivery needs a crane. The 20,000 gallon vertical tank buyers guide covers the class; the tank sizing calculator and the tank sizing guide settle the volume, and at this scale two smaller tanks on two slabs are sometimes the better plan.
One mold, three walls
| Part | Gallons | Diameter x height | Empty weight |
|---|---|---|---|
| 3030000C26 (this tank, 1.9 SG) | 20,000 | 165 x 242 in | 5,500 lb |
| 3030000C37 | 20,000 | 165 x 242 in | 5,000 lb |
| 3030000C37-BLACK | 20,000 | 165 x 242 in | 5,000 lb |
| 3030000N49 | 18,800 | 165 x 242 in | 5,500 lb |
The 3030000C37 and its black version are the same shell at 5,000 pounds, the lighter wall for water and dilute solutions. The 3030000N49 matches this tank's 5,500 pounds and is listed at 18,800 gallons because a thicker wall takes up volume inside the same mold. Between 5,000 and 5,500 pounds the choice is the liquid's density and the years the tank will stand in the sun.
Picked the 20000 gallon tank? Add it to your cart above; freight is quoted to your ZIP before you pay anything.
Fittings and the headspace
- Outlet: 3 inch fitting at the base; a flanged transition, an expansion joint, and a valve supported off the slab, with the bolts or nut re-checked after the first full fill.
- Access: 22 inch threaded, vented manway, 242 inches up; size the vent 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 real pressure at the fitting, and instrumentation at this height is a hydrostatic sender at the outlet or radar on the manway, never a climb. A polyethylene wall fails first in the vapor headspace, not on the liquid side, which is why the HDPE tank wall thickness guide tells operators to inspect above the liquid line.
What a 20,000 gallon tank does
As a chemical tank it is bulk storage for a treatment plant's caustic, ferric or alum, the tanker's full load in one vessel. 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, with the thickest wall Snyder puts on this mold.
How it ships
A 165 inch diameter tank that is 242 inches long on the deck is oversize freight (NMFC 156600) on a flatbed at a lane rate; the freight cost estimator prices the lane to your ZIP, and the listed price is before freight. Book the crane for 5,500 pounds, have the slab cured and surveyed, and plan a staged water fill with a hold at each stage before any chemical is ordered. A strap that is checked once a season is a strap that holds; put it on the same calendar as the gutters.
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 3030000C26.
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.
