The Snyder Industries 550 Gallon HDPE Vertical Liquid Storage Tank (SKU SII-1800400N45) is a 75-inch-tall white polyethylene tank on a 48 x 48-inch footprint, built to ASTM standards with a 1.9 specific-gravity rating. That 1.9 rating is the headline spec: this Snyder vertical handles dense liquids up to a contents weight of 8,715 lb, where a standard 1.5 SG build of the same size tops out far sooner. If you are storing anything heavier than plain water, the 1.9 build is the one to specify.
- Capacity: 550 gallons
- Height: 75 in
- Footprint: 48 x 48 in
- Material / Color: HDPE / White
- Specific-gravity rating: 1.9
- Brand: Snyder Industries
- Ships from: Chowchilla, CA (LTL, freight quoted to ZIP)
Will it work for your liquid?
Filled with water (SG 1.0) the contents weigh 4,587 lb, and the tank is rated to carry up to 8,715 lb of liquid - that headroom is what the 1.9 SG rating buys you for denser fluids. Confirm your fluid's specific gravity stays at or below the 1.9 ceiling before you order; the Tank Sizing Calculator and the Tank Sizing Guide walk you through matching capacity and weight to your application. The 48 x 48-inch footprint is worth measuring against your pad or containment before delivery, since a vertical storage tank loads its full weight onto that square base.
Fittings and access
Per the technical drawing on this page, this vertical tank is configured with a flange, an 18-inch PE threaded/vented fitting, and a manway with 15-inch access for inspection and cleaning. The vented fitting matters operationally - keep it unobstructed so the tank doesn't pull a vacuum on fast draw-down or build pressure on a fast fill. Review the technical drawing on this page to confirm fitting positions line up with your plumbing, and verify thread sizes against your existing connections. If you are running a denser liquid near the 1.9 SG ceiling, confirm the gasket and seal material at the flange and manway is compatible with your fluid - the wetted gaskets, not just the tank wall, are usually the first parts to fail.
Sizing and applications
As a true vertical HDPE storage tank, this 550-gallon Snyder suits water storage, rural and remote fire-water reservoirs, and dense-liquid duty within its 1.9 SG rating. Our 550 Gallon Vertical Liquid Storage Tank: Complete Buyer's Guide covers the full size class, the Fire-Water Reservoir Tank Design guide addresses NFPA 22 sizing for remote sites, and the HDPE wall-thickness guide explains the ASTM D1998 logic behind how this tank is sized.
This tank ships LTL freight from Snyder's plant in Chowchilla, California, with freight quoted live to your ZIP - West Coast sites see the shortest haul, so East Coast buyers should quote before assuming. Get your number from the Freight Cost Estimator or call 866-418-1777. List price excludes freight. The common mistake to avoid: ordering on capacity alone. With this 550-gallon vertical, confirm your liquid's specific gravity stays at or below the 1.9 rating, check gasket compatibility at the fittings, and measure the 48 x 48-inch footprint against your site before you buy.
