The Snyder Industries 4500 Gallon HDPE Vertical Liquid Storage Tank is a white polyethylene vertical storage tank built to a 1.4 specific gravity rating, certified to ASTM standards, and produced at Snyder's Chowchilla, California plant. It stands 91 inches tall on a 143 by 143 inch square footprint - that is roughly an 11.9-foot square base - making it a large-volume vertical tank for bulk water and high-density liquid storage where a tall, wide vessel is the right fit for the pad you have.
Does it work for your liquid?
The 1.4 specific gravity rating is the number to plan around. At full water capacity this tank carries 37,530 pounds of contents, and the shell is rated to hold up to 52,542 pounds of liquid at the 1.4 SG ceiling - and that 52,542 figure is exactly 1.4 times the 37,530-pound water weight, so the rating checks out arithmetically against the fill you plan. That headroom is what lets it store liquids heavier than water without overstressing the wall. If your liquid sits at or below 1.4 SG, this tank is rated for it; if it runs heavier, you need a vessel rated above 1.4 SG - our guide on Snyder Captor freeboard sizing per ASTM D1998 walks through how density and freeboard set the real volume you can actually use. The 143 x 143 inch footprint and 91-inch height should be checked against your slab and any overhead clearance before you order. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm working volume and weight loading for your site.
Fittings and access
Per the technical drawing on this page, this vertical storage tank is configured with a flange outlet, an 18-inch polyethylene threaded and vented lid, and a manway with 15-inch access. The vented lid is the only breathing path shown, and it matters: it lets the tank take in and release air as it fills and draws down, protecting the shell from the pressure and vacuum swings that damage a sealed vertical tank. Note that a vented lid handles atmospheric fill and draw only - it does not make this tank suitable for pressurized or fume-tight service, which needs a sealed, gasketed configuration not present in this drawing. The 15-inch manway gives you access for inspection and cleaning. One caution on hardware: flange and manway sealing gaskets and bolt kits are not itemized in this configuration, so confirm the gasket spec for your service before you plumb the flange outlet, since the flange position drives your outlet piping.
Freight and what to get right
This is a large vertical tank, so it ships LTL by motor freight from Snyder's plant in Chowchilla, California, with the cost quoted live to your ZIP - run your delivery address through the Freight Cost Estimator for a real number, or call 866-418-1777. The most common mistake on a tank this size is loading it past its rating: the 52,542-pound contents figure is the maximum at 1.4 SG, so verify your liquid's specific gravity before filling. The second is the foundation - a fully loaded 4500-gallon tank concentrates serious weight on its base, so plan a pad for the full 143 x 143 inch (11.9-foot) square footprint and size the concrete correctly; our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI framework. For the wall-thickness and ASTM D1998 sizing logic behind this style of HDPE storage tank, see our breakdown of HDPE tank wall thickness and where premature failures originate. Questions on Snyder vertical storage tanks or freight? Call 866-418-1777.
