The Chem-Tainer 650 Gallon Plastic Vertical Liquid Storage Tank (SKU TC5670IC) is a polyethylene vertical tank built for bulk liquid storage where headroom is easier to come by than floor space. It stands 70 inches tall on an approximately 56-inch-diameter cylinder, holding 650 gallons in a single upright shape. If you are sizing a vertical storage tank for water, process water, or general liquid storage, this is a steady performer in the mid-capacity range.
Will it work for your liquid?
This tank carries a 1.5 specific gravity rating, which is the heavy-duty tier for this style of vertical tank. Specific gravity is the weight of your liquid relative to water: water is 1.0, so a 1.5 rating means the walls are engineered to support liquids up to 50 percent denser than water, roughly 12.5 pounds per gallon. Filled with water, the contents weigh about 5,421 pounds; loaded to the full 1.5 SG rating, contents can reach about 8,132 pounds. That spread is exactly why this rating matters: it covers far more than plain water. Run your numbers through the Tank Sizing Calculator and check the Tank Sizing Guide so capacity and loaded weight line up with your application.
Pad, placement, and fittings
A vertical tank carrying this much weight needs a level, continuously supported base. The roughly 56-inch diameter sets your minimum round pad or containment-ring dimension, and you want that pad rated for the loaded weight, not the empty shell. For the structural framework on above-ground polyethylene tanks, the concrete pad sizing guide walks through the ACI 360R-10 framework and where the ACI 318 boundary applies. Outlet and fitting configuration is not finalized here, so confirm the exact outlet size and fitting locations against the technical drawing on this page, or call 866-418-1777 before you order. Pad penetrations and plumbing are far easier to position before the tank is set in place.
One mistake to avoid
The most common error on a tank this size is treating the specific gravity rating as free margin. The 1.5 SG rating is a structural limit, not a green light to load it with the densest liquid on the property. Match the rating to the actual density of what you are storing, and leave the wall some room. If you are comparing brands at a given capacity, the Snyder vs Norwesco vs Chem-Tainer brand comparison (run at the 2,000-gallon size; the methodology applies across capacities) shows how the same nominal size can differ across manufacturers. For water reuse setups where a vertical tank like this aggregates grey-water, rainwater, or HVAC condensate, the industrial water reuse tank topology guide covers quality-banded storage trains, and for private fire protection the fire-water reservoir tank design guide covers NFPA 22 sizing discipline and freeze protection.
This tank ships LTL freight from Hanford, CA, with the cost quoted live to your ZIP code. Get an exact number with the Freight Cost Estimator, or call 866-418-1777 and we will quote the freight and confirm the right vertical tank for your job.
