5000 Gallon Plastic Vertical Water Storage Tank in Green

The Snyder Industries SII-WG83 is a 5,000-gallon vertical water storage tank molded in green high-density linear polyethylene (HDLPE), standing 159 inches tall on a 102-by-102-inch footprint. It carries a 1.0 specific gravity rating, which is the correct match for water and other contents no heavier than water. This is a straightforward bulk water storage tank for rainwater capture, irrigation supply, fire-reserve, and industrial process water where a large, single-point vertical footprint makes sense.

Will it work for your site?

Filled to capacity with water, this tank holds roughly 41,700 pounds of contents, so the pad and site have to be engineered for that load on a fixed 102 x 102 inch base. The 1.0 specific gravity rating is the number to respect: it certifies the tank walls for liquids at the density of water. The tank ships with a factory fitting package shown on the technical drawing on this page, including a poly flange, a 1-1/2 inch polypropylene fitting with EPDM textured seal, and a 2 inch heavy-duty polypropylene bulkhead fitting with EPDM gasket. Access and venting come from a 24 inch vented polyethylene manway, sized for maintenance entry and open enough to prevent vacuum collapse during hard draw-down. To confirm the tank works for your draw rate and standpipe height, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide before you commit.

Wetted materials

Before you swap or add a fitting, confirm the wetted materials against your fluid: the tank walls are HDLPE, the fitting bodies are polypropylene, and the seals are EPDM elastomer, not Viton or Buna. For plain water storage that combination is well matched. If you ever consider anything other than water, those material facts are the starting point, and a liquid heavier than water would need a tank rated for that specific gravity, which this 1.0-rated model is not.

Foundation and installation

A tank of this height and weight needs a level, load-rated pad. Our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework for sizing that base. After the tank is set and plumbed, follow the hydrostatic test methodology for new-install acceptance to verify pad settlement and check every fitting for leaks before the tank goes into service. If this vertical storage tank is feeding a rural fire-protection stack, the fire-water reservoir design guide covers NFPA 22 sizing discipline and cold-climate freeze protection, and for reclaimed-water duty the industrial water reuse topology guide shows how a tank this size fits a grey-water or rainwater aggregation train.

The mistake to avoid

The 1.0 specific gravity rating is a water rating. Do not put a liquid heavier than water into this tank without selecting a tank rated for that specific gravity, or you will overstress the walls. Confirm your fill weight against that 41,700-pound full-water figure so the foundation and any anchoring are sized to the real load, not an estimate.

This vertical water storage tank ships LTL freight from the Snyder plant in Merced, California, quoted live to your ZIP code. Get an exact number from our Freight Cost Estimator or call 866-418-1777 to lock in delivery and talk through offload at your site.