The Snyder Industries 18,800 gallon vertical HDPE storage tank is built for high-volume bulk liquid storage, water reservoirs, and process holding where a single large vertical tank beats a bank of smaller ones. It is rotationally molded in white polyethylene, stands 242" tall on a 165" x 165" square footprint, and carries a 1.4 specific gravity rating with ASTM certification. Read that SG rating first: it is the hard ceiling on what this wall is engineered to hold. Do not store a liquid above 1.4 specific gravity in this tank — that is the design limit, full stop.
Will it work for your liquid?
Water fills this tank to 156,792 lb at capacity, and the wall is rated to carry contents up to 219,509 lb — that 1.4 specific gravity headroom is what lets you store a liquid denser than plain water (SG 1.0) without overloading the shell. Those are filled-contents loads, not shipping weight; the tank ships empty. If your liquid is denser than water, that margin is exactly what keeps you inside the design envelope. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm your fill volume and weight before you pour a pad, and read our guide on HDPE tank wall thickness and ASTM D1998 sizing logic to understand why the vapor-saturated headspace, not the liquid line, is where premature failures usually start. Storing something denser than SG 1.4, or need secondary containment? See our Snyder Captor double-wall freeboard sizing guide and call 866-418-1777 — we can spec a higher-rated or double-wall tank.
Fittings, venting, and access
Per the technical drawing on this page, this vertical storage tank carries a 24" PE threaded/vented fitting, a manway with 22" access, and a bulkhead fitting. The 24" vented fitting provides the atmospheric venting a tank this volume needs during rapid fill and draw, where an unvented shell can pull a vacuum and collapse or overpressure — confirm its placement and vent sizing on the drawing against your transfer rates. The 22" manway access matters on a tank this size because internal inspection and maintenance are part of long-term ownership, not an afterthought. The PE shell may suit your liquid while an elastomer gasket does not, so confirm the 24" threaded fitting's gasket, the manway gasket, and the bulkhead gasket are each rated for what you store before you plumb anything.
Footprint and foundation
At 165.0 x 165.0 inches square and 242" tall, this is a large vertical tank that demands a properly engineered foundation. A flat, level, fully supporting pad is not optional at these weights. Our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework so your base carries the full 219,509 lb rated load without uneven settlement. For fire-water and reservoir applications, our fire-water reservoir design guide covers NFPA 22 sizing discipline and cold-climate freeze protection.
This Snyder Industries HDPE vertical tank ships empty by LTL freight from the plant in Washington Court House, Ohio, quoted live to your ZIP. Get an exact number from our Freight Cost Estimator, or call 866-418-1777 to talk through delivery, offload, and foundation requirements on a tank this size before you order.
