The Chem-Tainer 350 Gallon 20-degree cone bottom tank (SKU TC4260CB) is built for operations that need every gallon to drain - chemical batching, settling, and processes where solids and residual heel are the enemy. Molded in polypropylene with a 2.0 specific gravity rating, this open top cone tank handles dense chemistries that overwhelm standard 1.0-1.5 SG water tanks. It measures 45 inches in diameter and stands 60 inches tall overall, so plan your stand and overhead clearance before it arrives.
Will this cone bottom tank work for your process?
This is an "Open Top - Cone Bottom NO Stand" configuration, so the cone discharge geometry depends on a support stand you supply or order separately - the tank itself is not freestanding on its cone. The open top is a full 45 inch round mouth, giving you complete access for manual fill, mixer mounting, inspection, and cleaning, while the 20-degree cone pitches contents toward a center discharge for more complete drainage than a flat-bottom tank. No cover or lid is included in this configuration, so factor one in if your process needs it. For sizing your contents load: filled with water this tank carries roughly 2,919 lb, and at its maximum 2.0 SG rating it can hold up to 5,838 lb of contents. Size your stand, anchoring, and floor loading to that maximum rated weight, not the water figure. Use our Tank Sizing Calculator and Tank Sizing Guide to confirm the cone tank fits your batch volumes and drain-down schedule. If you're weighing cone angles, the 30 vs 45 degree drainage comparison and the cone bottom buyer's guide explain how cone pitch drives drainage rate and residual heel.
Chemical compatibility
This tank is molded in polypropylene and rated to 2.0 specific gravity, which covers a wide range of heavier-than-water chemistries. Before placing it in chemical service, confirm your specific chemical, concentration, and temperature against the Chem-Tainer chemical-resistance chart - compatibility is concentration- and temperature-specific, and the resin, fitting material, and any gasket material all have to suit the service. This tank ships with no pre-installed fittings or bulkhead, so the bottom discharge, vent, and fill must all be specified and added - match those fittings and gaskets to the same chemical the resin is rated for. When you lay out fittings on an open top cone tank, the fitting placement strategy guide helps you separate vent, fill, level, and drain functions to avoid cross-contamination and maintenance conflicts. Our Chemical Compatibility Database is a starting reference, but the OEM chart governs. If your contents exceed 2.0 SG, call 866-418-1777 before ordering rather than assuming this tank covers it.
The mistake to avoid
The most common error on a cone bottom tank like this is under-rating the support. The 2.0 SG rating means contents can reach 5,838 lb - nearly double the water weight - so a stand and floor sized for a water tank can be dangerously undersized here. The second mistake is treating the SG rating as a chemical approval; it is a density rating, not a compatibility statement. An open top with no lid is also exposed to ambient ingress - rain, debris, and vapor - so for outdoor or volatile service plan a cover and proper vent layout up front. Finally, a 20-degree cone drains more slowly and leaves more residual heel than a steeper 30 or 45-degree cone, so if near-zero heel matters to your process, verify the angle suits it before you commit, and always cross-check resin, fitting, and gasket material against the OEM resistance chart for your exact chemical.
This open top cone tank ships LTL freight from the nearest Chem-Tainer plant - Hanford, CA or West Babylon, NY - quoted live to your ZIP. Get your freight quote with our Freight Cost Estimator, or call 866-418-1777 to talk through stand options, fittings, and lead time with our team. See the technical drawing on this page for fitting and dimensional detail before you order.
