The Snyder Industries 18,800-gallon HDPE vertical liquid storage tank is built for bulk water and process-water storage where a single large reservoir replaces a bank of smaller tanks. This white polyethylene vertical storage tank stands 242 inches tall on a 165 x 165 inch footprint, carries a 1.9 specific gravity rating, and ships with ASTM certification - the structural pedigree you want when a vertical tank this size sits full for months. If you are sizing an HDPE storage tank for municipal, agricultural, fire-water, or industrial water duty, this is the upper end of what polyethylene does in one body.
Quick spec snapshot
Capacity 18,800 gallons - Dimensions 242 in H x 165 in x 165 in - Color White - Material HDPE polyethylene - Specific gravity rating 1.9 - ASTM certified - Ships from Washington Court House, Ohio. Full of plain water, the tank and contents weigh 156,792 pounds. The 1.9 SG rating means the wall is engineered to carry liquids up to 1.9 times the density of water - roughly 18,800 gal x 8.34 lb/gal x 1.9, which is where the 297,905-pound max rated contents weight comes from. That headroom covers most process waters and brines, not just plain water, with no need to re-rate the shell.
Will it work on your site?
The numbers that decide your pad and your rigging are above. That 165 x 165 inch footprint is what your concrete pad has to support, so read the wall and fitting layout on the technical drawing on this page before you set anchors. Fittings include a 24-inch PE threaded and vented fitting, a manway with 22-inch access for entry and inspection, and a bulkhead (BH) for your outlet plumbing. Confirm thread and bulkhead sizes against the drawing so your fill, vent, and discharge lines land where you need them - and match each connection's gasket to your stored liquid (the threaded vent/fill cap, the bulkhead flange, and the 22-inch manway lid all seal on gaskets you should verify before service).
Sizing and pad engineering
A reservoir at this scale is a structural decision before it is a plumbing one. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm 18,800 gallons matches your draw and refill cycle, then engineer the foundation: our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework and the ACI 318 boundary for a load this heavy. If you plan to use the 1.9 SG headroom for a denser liquid, the Snyder Captor freeboard sizing guide covers ASTM D1998 freeboard, thermal expansion, and the real usable volume density gives you. For private fire protection, the fire-water reservoir design guide covers NFPA 22 sizing discipline and cold-climate freeze protection.
The mistake to avoid
The single biggest error on a tank this tall is underestimating the wall and the headspace. Our breakdown of HDPE tank wall thickness at the vapor-saturated headspace explains why premature failures originate above the liquid line, where liquid-side inspection misses them, and how ASTM D1998 sizing logic governs a tank rated to this SG. Specify your fittings and inspection plan with that headspace in mind, and keep the 24-inch vented fitting clear so the tank breathes as it fills and draws down.
This vertical storage tank ships LTL, quoted live to your ZIP from the Snyder plant in Washington Court House, Ohio - a single FOB origin, so transit and rate scale with distance from Ohio, which is why a live ZIP quote is the only accurate number. At 18,800 gallons this is an oversize freight move - get an exact rate through the Freight Cost Estimator or call us at 866-418-1777 to coordinate delivery, offload, and pad readiness for a tank of this size. Listed before freight; freight is quoted separately to your ZIP.
