The Snyder Industries 3900 Gallon HDPE Vertical Liquid Storage Tank is a Lincoln, Nebraska-built polyethylene vertical tank rated for water and general liquid storage. It carries a 1.5 specific gravity rating and an HDPE wall built to ASTM standards, with a 90-inch by 90-inch footprint and a standing height of 163 inches. For municipal water reserve, agricultural supply, fire-water reservoir duty, and bulk process water, this vertical storage tank answers the three questions that matter before you buy: does it fit and hold what you need, what does freight look like, and what mistake do people make on a tank this size.
Will it work for your job
This is a 3900-gallon HDPE vertical tank measuring 90 inches across the base and 163 inches tall, so plan your site clearance and door or gate access around that height before delivery. Off the technical drawing, it carries these fittings:
- Flange fitting
- 18-inch PE threaded/vented fitting (this is your vent path on drawdown, so do not cap it or you risk pulling a vacuum on the wall)
- Manway with 15-inch access opening for cleanout and interior inspection
- 10-inch by 12-inch fitting (S.U.M.O.)
- Flat S.U.M.O. fitting
See the technical drawing on this page for exact placement and elevations so your plumber can match threads and bulkhead fittings and rough in before the tank arrives.
Sizing, load, and the 1.5 SG headroom
At a glance: 3900-gallon capacity, 90 x 90 inch footprint, 163-inch height, HDPE construction, full-water weight of 32,526 pounds, and a maximum rated contents weight of 48,789 pounds at 1.5 specific gravity. That maximum is a load rating, not a fill target. The practical benefit is roughly 16,000 pounds of weight headroom above full water, which means this tank carries denser liquids up to 1.5 specific gravity without re-spec'ing. If you later batch with a heavier additive, you do not need to rebuy a stronger tank, which is the advantage over a water-only 1.0-SG vessel. Full of water it weighs 32,526 pounds, and the pad beneath it must carry that load plus the tank itself across the full 90 x 90 inch footprint, so it belongs on an engineered concrete pad rather than bare soil or gravel that can settle and stress the wall. Our concrete pad sizing guide walks the ACI 360R-10 and ACI 318 framework, and the Tank Sizing Calculator and Tank Sizing Guide help you confirm 3900 gallons fits your draw rate and refill cycle. For fire-protection service, the fire-water reservoir design guide covers NFPA 22 sizing discipline and freeze protection for cold-climate sites.
The mistake to avoid on a tank this size
The wall on an HDPE vertical tank is thickest at the base and thins toward the top, sized to the hydrostatic load the ASTM D1998 standard assumes. The premature failures on tanks like this tend to start in the vapor-saturated headspace, not the liquid side where inspections usually focus. Read our wall-thickness analysis before you set inspection intervals, and never overfill past the rated level expecting the 1.5 SG margin to act as free freeboard. That margin is for content density, not for filling above the manway.
This tank ships LTL freight from the single Snyder plant in Lincoln, Nebraska, so your ZIP and dock or liftgate access drive the number on this oversize, 163-inch unit, and freight is quoted live to your ZIP rather than folded into the list price. Get an exact figure with our Freight Cost Estimator, or call 866-418-1777 and we will quote it by phone and help confirm the right fittings and footprint for your install.
