The Snyder Industries 4000 Gallon ASTM Black Vertical Storage Tank (SKU 7421100N49) is a heavy-duty polyethylene vertical tank built for bulk water and high-density liquid storage. It stands 104 inches tall on a 120 x 120 inch footprint, holds a nominal 4,000 gallons, and carries a 1.5 specific gravity rating, meaning the wall and fittings are engineered to hold liquids up to 50 percent denser than water without derating the volume.
Will it work for your site
Start with the load numbers. Filled with plain water this tank carries roughly 33,360 pounds of contents; at its full 1.5 SG rating it is built to hold up to 50,040 pounds. Those weights drive the pad, the anchoring, and the soil bearing beneath it. Before you order, confirm you have a level base of at least 120 x 120 inches (10 x 10 feet) with 104 inches of vertical clearance for fill and access. Above-ground polyethylene tanks this size need a properly sized, fully supporting concrete pad; our concrete pad sizing guide walks through the ACI 360R-10 framework for getting that base right. If you are still choosing a capacity, the Tank Sizing Calculator and Tank Sizing Guide match tank volume to your real draw and refill cycle. Keep in mind that the nominal 4,000 gallons is not the same as working volume once you allow freeboard for thermal expansion; the Snyder freeboard sizing guide explains the difference per ASTM D1998.
Fittings and access
Per the technical drawing on this page, this vertical storage tank is configured with a flange fitting, an 18-inch PE threaded and vented fitting, and a manway with 15-inch access for interior entry, inspection, and cleaning. The flange is a bolted connection, so confirm your gasket and bolt-up hardware and torque before plumbing to get a clean seal. Check every fitting location and elevation against the drawing before you route the inlet and outlet, since placement determines usable draw-down. The vented fitting matters on a tank this size: as water moves in and out the tank has to breathe, and the vent keeps you from pulling a vacuum or pressurizing the head space.
Sizing and application
At 4,000 gallons this black vertical tank sits in the range commonly used for rural and remote fire-water reserves, agricultural and irrigation supply, and industrial process and reuse water. The black color helps limit light transmission and algae growth in above-ground service. For fire-protection reserves, our fire-water reservoir design guide covers NFPA 22 sizing discipline and cold-climate freeze protection, and for grey-water, rainwater, and HVAC condensate the industrial water reuse topology guide shows how storage fits into a banded reuse train.
This tank ships LTL freight from the Snyder plant in Chowchilla, California, with the exact cost quoted live to your ZIP. Get a number in seconds with our Freight Cost Estimator or call 866-418-1777 to confirm access, offload equipment, and delivery details. One mistake to avoid on a tank this size: plan the pad, the anchoring, and the offload before the truck arrives, because a filled 4,000-gallon tank is not something you reposition after the fact.
