The Snyder Industries 4500 Gallon ASTM XLPE Double Wall Tank is a fully contained crosslinked polyethylene storage system rated for high-density liquids up to a 1.9 specific gravity. Built with a primary inner tank nested inside a secondary outer shell, this double wall design provides integral secondary containment without the need for a separate dike or basin. It stands 197 inches tall on a 102 x 102 inch footprint, holds 4,500 gallons in natural white crosslinked linear polyethylene, and is built to the ASTM D1998 standard for polyethylene tank construction.
Will it work for your site
The two questions that decide fit here are headroom and floor loading. At 197 inches tall (roughly 16.4 feet) on a square 102 x 102 inch footprint, confirm your overhead clearance and door or roll-up opening before scheduling delivery. The weight math matters more than most buyers expect: filled with water, this XLPE double wall tank carries about 37,530 pounds, and at its maximum rated 1.9 specific gravity contents it reaches roughly 71,307 pounds. That load lands on a pad about eight and a half feet square, so your foundation has to be engineered for it. A level, continuously supporting concrete pad sized to the full footprint is not optional at this weight. One more sizing note: the 4,500-gallon figure is the nameplate capacity, and ASTM D1998 freeboard for thermal expansion means your usable volume sits below that number. Work the real numbers for your specific liquid with the Tank Sizing Calculator and the Tank Sizing Guide before you set the pad.
Why crosslinked and double wall
This is an XLPE tank, not a standard linear polyethylene tank. The crosslinked resin gives it the higher specific gravity rating and the impact resistance that heavier-duty service demands. The 1.9 SG rating is the headline number: it tells you the tank wall is built for liquids far denser than water, which is why the rated contents weight runs so far above the full-water figure. The double wall construction means the secondary shell captures a leak from the primary tank, which is what makes this style suited to installations where a release to the ground is unacceptable. For the engineering behind freeboard, thermal expansion, and the usable volume you actually get out of a tank like this, read our guide on Snyder Captor double-wall freeboard sizing per ASTM D1998, and for where these tanks fail first, our guide on wall thickness at the vapor-saturated headspace.
The mistake to avoid
Do not undersize the foundation to the empty tank or the water weight. The rated contents weight of about 71,307 pounds at 1.9 SG, not the 37,530-pound water figure, is what your pad and any anchoring must be designed around if you intend to run a dense liquid. The second mistake is treating the 1.9 SG rating as a green light for any chemical: the rating describes density tolerance, not chemical compatibility, and crosslinked polyethylene is not universally resistant. Confirm your specific liquid against the OEM chemical-resistance chart at your service concentration and temperature before filling. This pack carries no published fitting schedule for this tank, so do not finalize your plumbing or containment plan from assumed nozzle sizes: verify the as-built fitting layout, outlet placement, and dimensions against the technical drawing on this page first.
This tank ships LTL freight from the Snyder plant in Lincoln, Nebraska, quoted live to your ZIP code. Get a real number for your delivery with our Freight Cost Estimator, or call 866-418-1777 to talk through clearance, pad, and offload before you order. For specifying and sizing help across the full XLPE double wall lineup, our team can walk you through your options.
