The Snyder Industries 4100 Gallon HDLPE Vertical Liquid Storage Tank is a 100-inch-tall vertical tank on a 120 x 120-inch footprint, molded in white high density linear polyethylene and built to ASTM D1998 standards. It carries a 1.9 specific gravity rating - above the typical 1.5 SG of standard water-only vertical tanks - which is the spec that matters most when you size this tank for anything heavier than water. At 1.9 SG, the shell is rated for liquids up to about 1.9 times the density of water, holding contents weighing up to roughly 64,969 lb at full volume, versus the 34,194 lb a full charge of plain water puts on the floor. Those are the same physical limit expressed two ways: 64,969 lb at 1.9 SG works out to the 34,194 lb water figure at 1.0 SG. That density headroom is what separates a tank you can trust under dense liquids from one you cannot.
Will this Snyder vertical storage tank work for your site?
Start with the weight, not just the gallons. A full water fill is about 34,194 lb, and the maximum rated contents weight at the 1.9 SG limit is about 64,969 lb. Use those two numbers to confirm your pad and your liquid both fall inside the rating before you buy. Note that 4100 gallons is the rated shell volume, not a fill-to-the-brim working volume: at higher specific gravity you must leave freeboard, so your usable volume sits below 4100 gallons. The freeboard sizing guide per ASTM D1998 shows how to figure the real volume you can actually use. The 120 x 120-inch footprint and 100-inch height define the pad and overhead clearance you need to plan for. If you are still narrowing capacity, the Tank Sizing Calculator and the Tank Sizing Guide walk you through matching real liquid weight to a rated shell.
Fittings and access
The technical drawing on this page details the molded-in fitting layout: a flange, an 18-inch PE threaded manway for top access, cleaning, and inspection, and eight flat fitting pads arranged at 45-degree typical spacing so you can locate inlets, outlets, and instrumentation where your piping actually runs. Confirm the manway and flange sizing against your fill and vent plan before installation. One caveat the shell rating does not cover: the gasket and seal materials you supply at the manway and flange are what actually contact the stored liquid, so confirm those elastomers are rated for your specific liquid and SG - the PE rating stops at the molded surfaces.
Freight and ordering
This vertical storage tank ships LTL from the Snyder plant in Marked Tree, Arkansas. Freight on a tank this size is quoted live to your ZIP rather than rolled into the list price - get your exact number with the Freight Cost Estimator or call 866-418-1777. The most common sizing mistake on an HDPE vertical tank is buying for gallons alone and ignoring wall-thickness and density limits; the guide on HDPE tank wall thickness and ASTM D1998 sizing logic explains why, and the concrete pad sizing guide covers supporting that 64,969 lb load. For fire-protection reservoirs, see our fire-water reservoir design guide. Ready to move? Add it to your cart, or call us at 866-418-1777 for help spec'ing the right vertical storage tank.
