The Enduraplas 6100 Gallon Open Top Tank is a large-format rectangular polyethylene reservoir built for bulk water storage where an open top keeps filling, inspection, and access straightforward. Molded in HDLPE and carrying the 1.35 specific-gravity model designation, it holds 6,100 gallons in a square 120 x 120 inch footprint standing 126 inches tall — a stable, high-capacity block for fire-water reserves, rainwater and process-water aggregation, and industrial water reuse trains.
Will it work for your site?
Confirm three things before you commit: capacity, footprint, and filled weight. At 6,100 gallons the tank holds roughly 50,874 pounds of water when full, and that load sits on a square 120 x 120 inch base standing over ten feet tall — a real static-head column against the lower walls. The pad underneath has to be flat, dead-level, and continuously supported across the full footprint so the walls load evenly. If you're pouring concrete, work from the ACI 360R-10 pad-sizing framework so the slab is matched to the mass and point loads. Not sure this is the right volume for your draw-and-refill cycle? Run the numbers with our Tank Sizing Calculator and the Tank Sizing Guide first. Verified dimensions and the technical drawing are on this page — check the drawing for exact overall height and base geometry against your available space.
The mistake to avoid
This is a bare open-top vessel — no factory fittings are listed, so bulkhead fittings and gaskets are added to match your fluid and duty. It's engineered for atmospheric, vented storage, not pressurized or sealed containment. The 1.35 specific-gravity designation means the wall is built for fluids denser than water, but confirm the resin against anything heavier than water before you fill it; keep it to vented water and reuse service otherwise. For open reservoirs supporting private fire protection, the NFPA 22 sizing and freeze-protection guide covers where a poly reservoir fits the stack, and if you're aggregating grey-water, rainwater, or HVAC condensate, the water-reuse tank topology guide walks through quality-banded storage trains and treatment sequencing.
Freight
This open-top tank ships empty by LTL freight — the 50,874-pound figure is filled water weight, not the shipping weight, so quote the empty poly vessel, not the full load. Get a real number for your delivery ZIP with our Freight Cost Estimator, or call 866-418-1777 and we'll size the shipment, confirm site access, and lock in the route. Freight is quoted separately from the tank's list price.
