The Snyder Industries 12,500-gallon HDPE vertical liquid storage tank is built for high-volume above-ground water service, with an ASTM D1998-rated wall package and a 1.5 specific gravity rating that gives you real headroom over plain water. At 198" tall on a 142" x 142" footprint, this is a fixed-installation tank: it ships on its own dedicated freight and needs a poured pad, so the planning matters as much as the spec sheet.
Will this vertical storage tank work for your site?
Full of water, this tank carries 104,250 lb of contents; at its maximum 1.5 SG rating it is engineered to hold up to 156,375 lb. That rating is the buyer-decision number: this vertical is rated to be filled to full capacity with any liquid up to 1.5 specific gravity - fluids up to 50% denser than water, such as brine or many fertilizer solutions - without de-rating the fill line, where many water-only verticals are rated only to 1.0. Use both weight numbers when you size your foundation: your pad has to carry the rated load, not just the water weight. The 142" x 142" footprint is the diameter you need to clear (roughly 11.8 ft), and the 198" height is the vertical clearance for filling and venting. For a structured walkthrough, run your numbers through the Tank Sizing Calculator or read the Tank Sizing Guide before you commit to a pad layout.
Fittings, access, and gasket discipline
The drawing on this tank shows a worked-out fitting layout rather than a bare shell: a flange and flat fitting, an 18" PE threaded/vented fitting, a 12" x 30" fitting, a bulkhead, and a manway with 15" access for inspection and cleaning. The 18" PE threaded/vented port sets your vent thread size, and the bulkhead fitting is where outlet gasket selection matters - match the gasket material to your stored fluid and confirm it against service before you plumb. See the technical drawing on this page for the exact placement, elevation, thread, and bolt-circle of each port before you connect the inlet, outlet, and vent - confirming clearances and gasket spec on the drawing now saves a return trip up the tank later.
How it ships and the mistakes to avoid
This Snyder HDPE vertical tank ships LTL from the Lincoln, NE plant, freight quoted live to your ZIP - get your number from the Freight Cost Estimator or call 866-418-1777. A tank this size moves as a dedicated delivery, so confirm site access for the trailer and unloading equipment ahead of time. A 142" base at roughly 16.5 ft tall is a high-aspect-ratio vertical, so the pad must be level and full-bearing across the entire 142" base, and the tall profile is why anchoring and wind loading deserve a check on exposed sites.
The most common mistake on a large vertical tank is treating the wall thickness as uniform when it is not - HDPE shells are built thinner toward the top per ASTM D1998 sizing logic, and the vapor-saturated headspace is exactly where premature failures tend to start. Worth your time before installation: HDPE tank wall thickness at the vapor-saturated headspace and concrete pad sizing for above-ground polyethylene tanks. If you need secondary containment for this single-wall vertical, the Snyder Captor double-wall freeboard sizing guide covers containment and freeboard math, and if you are sizing this as a fire-water reservoir, the NFPA 22 sizing guide covers the freeboard and freeze-protection discipline for cold-climate sites. Questions on fittings, freight, or pad requirements - call 866-418-1777 and we will work the numbers with you.
