865 Gallon Plastic Vertical Water Storage Tank in Mocha

The Enduraplas 865 Gallon Vertical Water Storage Tank (SKU 45447) in Mocha is a straight-wall polyethylene bulk-water vessel built for above-ground utility and bulk water storage. It holds 865 gallons on a 61" diameter round footprint and stands 75" tall, so it packs real capacity onto a compact pad. Dimensions are verified against the launch spec, and you can confirm the fitting layout on the technical drawing on this page before you plumb it.

Will it work for your site?

This is a vertical water storage tank sized for well buffering, rainwater and reuse collection, fire-water reserve, and general bulk water holding. The top fittings are straightforward:

• Manway: 16" threaded vented cover — lets air move as the level rises and falls, which matters on fast fill and draw cycles.
• Outlet: 2" bulkhead — a gasket-sealed penetration, so the outlet ships as a finished port ready for your supply or drain line.

This is a water and bulk-water tank. For chemical or higher-density service, confirm the specific-gravity rating with us before ordering rather than assuming — the pack does not carry an SG rating for this unit, and heavier liquids can demand a different wall build.

Plan the pad before the tank ships

Filled to capacity, this tank carries a full-water weight of about 7,214 lb, so the foundation under it has to hold roughly 7,200 lb without settling. Treat that as a two-step pre-install checklist: pour a pad rated for the load using the ACI 360R-10 framework in our concrete pad sizing guide, then prove the install with a water-fill acceptance test per our hydrostatic test methodology guide, which covers pad-settlement monitoring and fitting leak detection during the hold.

Sizing it against your demand

If you are still deciding between capacities, run your numbers through the Tank Sizing Calculator and read the Tank Sizing Guide to match storage to your daily draw and refill window. Sites running private fire protection should size to the reserve requirement first — our NFPA 22 fire-water reservoir guide covers the sizing discipline and cold-climate freeze protection. For grey-water, rainwater, and HVAC condensate aggregation, the water reuse tank topology guide shows how a tank this size fits into a quality-banded storage train.

The mistake to avoid

Do not blank off or plumb over the vented manway cover. This tank vents through that 16" top opening — cap it solid and a fast draw can pull a vacuum on the wall, while a fast fill can pressurize the headspace. Keep the vent path open, and use the 2" bulkhead for your line work rather than cutting new penetrations that the drawing does not show.

This tank ships LTL freight on a pallet, quoted live to your ZIP — get your number from the Freight Cost Estimator or call us at 866-418-1777 and we will handle the quote and delivery details with you.