The Snyder Industries 3000 Gallon Captor Double Wall Tank is a containment-grade vertical built from crosslinked linear polyethylene (XLPE) to the ASTM standard, with a stout 1.9 specific-gravity rating that handles dense liquids well beyond plain water. The double-wall design integrates primary and secondary containment in one footprint, so the secondary catches a release without a separate poured berm. At 142 inches tall on a 102 x 102-inch footprint and finished in natural white, this XLPE double wall tank answers the buyer's first question - will it work - with hard numbers rather than promises.
Specs and fittings that decide the install
Full of water, this tank carries roughly 25,020 lb; at its maximum rated contents weight it reaches about 47,538 lb, so your pad, anchoring, and freeboard math all hinge on the actual liquid you plan to store. The 1.9 SG rating is the headroom that makes that possible - it is why this Captor is the choice when you need double-wall containment for dense liquids that a standard 1.0 to 1.5 SG tank cannot structurally carry. Factory fittings per the technical drawing include a flange, an 18-inch PE threaded/vented fitting, and a manway with 15-inch access for inspection and cleanout. Reference the technical drawing on this page for fitting placement and elevations before you plumb, and specify gaskets and any bulkhead hardware to chemically match your stored liquid - the 18-inch PE threaded/vented fitting and the 15-inch manway access are the two service connections to confirm seal compatibility on before commissioning. If you are still working out usable volume versus nameplate capacity, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide, then read our walkthrough on Captor double-wall freeboard sizing per ASTM D1998 so thermal expansion and density do not eat into the volume you actually need.
The mistake to avoid
The common error on an XLPE double-wall tank this size is treating the 1.9 SG number as a license to skip the math. That rating tells you the tank can structurally hold a liquid up to 1.9 times the density of water - it does not approve any specific chemical for service, and it does not change how heavy a full load sits on your foundation. Size the pad and anchoring to the maximum rated contents weight of about 47,538 lb, not to the water weight, and verify your liquid's density falls within the rating before commissioning. For oil and chemical containment duty, our guide on Captor double-wall tanks for SPCC 40 CFR 112 compliance walks through how the integrated secondary containment supports a compliance posture. If the tank serves fire-water or reservoir storage, the NFPA 22 fire-water reservoir design guide covers sizing discipline and freeze protection.
Inspection and long-term integrity
The 15-inch manway access is your window for routine interior inspection - use it. Premature failures on polyethylene tanks often start at the vapor-saturated headspace rather than the wetted wall, which liquid-side checks can miss; our deep dive on wall thickness at the vapor-saturated headspace explains where to look and why the ASTM D1998 sizing logic matters for service life.
This Snyder 3000 gallon XLPE double wall tank ships LTL freight, quoted live to your ZIP. Production runs from more than one Snyder plant, so while the Lincoln, NE plant is a fulfillment origin, the Freight Estimator returns the rate for the plant that actually ships your order. At 142 inches tall and 102 inches square, confirm overhead clearance and equipment to offload the unit before the truck arrives. Get a freight quote to your ZIP in seconds with our Freight Cost Estimator, or call 866-418-1777 and we will work out the best route to your site.
