The Snyder Industries 4000 Gallon Heavy Duty Vertical Storage Tank (SKU 7421100N42) is molded in crosslinked linear polyethylene (XLPE) and rated to a 1.9 specific gravity. It stands 104 inches tall on a 120 x 120 inch footprint in natural white, sized for bulk water duty — a rural fire-water reservoir, an irrigation buffer, or a process-water storage tank — with real wall headroom for dense liquids when you need it. If you are checking whether this vertical tank fits your pad, your freight budget, and your service, the numbers below answer all three.
Will it work for your site?
At 4,000 gallons the tank holds 33,360 pounds of water when full, and the wall is rated to carry up to 63,384 pounds of contents at its full 1.9 specific gravity — that headroom is the point of XLPE over standard HDPE. Plan your slab for the loaded 120.0 x 120.0 inch footprint and the full 104-inch height plus fitting clearance. Factory fittings shown on the technical drawing on this page are a flange, an 18-inch PE-threaded fitting, and a manway with 15-inch access for interior inspection and cleaning. The 18-inch PE-threaded fitting is vented, so this tank is configured for atmospheric (non-pressurized) storage — worth knowing if you were planning to seal it. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm this 4000-gallon vertical tank matches your drawdown and refill cycle before you commit.
Why crosslinked polyethylene here
XLPE is a crosslinked resin, not standard linear HDPE, and that difference matters when the stored liquid is dense. The 1.9 specific gravity rating means the wall is engineered for contents far heavier than water, which is why this Snyder vertical storage tank carries a max rated contents weight well above its water weight. This tank is designed to the ASTM D1998 framework for XLPE vertical tanks. If your application stores a liquid heavier than water, read Snyder XLPE vs HDPE: when crosslinking matters to confirm the resin choice, and review concrete pad sizing for above-ground polyethylene tanks before pouring your foundation.
The mistake to avoid
Do not undersize the pad or the freeboard. A tank this heavy needs a fully engineered slab sized for the loaded weight, not the empty shell — and if you are storing a liquid near the 1.9 SG limit, allow freeboard for thermal expansion; the Snyder freeboard sizing guide shows how to size the real usable volume. For fire-protection duty, size the reservoir to your NFPA target before ordering — the fire-water reservoir design guide walks through NFPA 22 sizing and cold-climate freeze protection. One more honest note: flange gaskets, thread sealant, and fitting hardware are sized to your connection and quoted separately — call 866-418-1777 and we will spec them with you rather than assume plumb-and-go.
This tank ships LTL freight from the Snyder plant in Chowchilla, California, quoted live to your ZIP code. Because it molds on the West Coast, Western destinations see the shortest LTL lanes, while Eastern ZIPs should pull a live quote before budgeting the long-haul. Get an exact number in seconds with the Freight Cost Estimator, or call 866-418-1777 and we will quote it with you. One Source Plastics lists this tank at its list price before freight.
