The Chem-Tainer 30 Gallon 20 Degree Plastic Vertical Cone Bottom Tank (SKU TC1829CB) is a polyethylene open-top cone bottom tank built to fully drain. At 19 x 19 inches across the base and 29 inches tall, the 20-degree cone keeps solids and sediment migrating toward the outlet instead of settling into a flat floor - the reason a cone bottom tank earns its place over a standard vertical for batching, settling, and complete-drain chemical work. This is the cone-bottom-NO-stand configuration, so it is designed to sit in a customer-supplied support stand that fully cradles the angled bottom.
Will it work for your application?
This tank carries a 2.0 specific gravity rating, which is heavy-duty for a 30 gallon vessel and gives you real headroom for dense chemicals. The sizing math: 30 gallons of plain water weighs about 250 lb, and the tank is rated to carry up to 500 lb of contents. That 500 lb ceiling against a 250 lb water fill is exactly the margin the 2.0 SG rating buys you, so a chemical up to twice the density of water still falls inside the rating at full volume. Run the numbers for your own liquid with the Tank Sizing Calculator and the Tank Sizing Guide before you commit. One install gotcha: the listed 29 in height is the tank alone - because this is the NO-stand version, a support stand adds height beneath it, raising both the discharge elevation and the floor footprint you need to plan, so add the stand's height when you size your headroom and outlet drop. The angled bottom is not meant to bear load on its tip, so plan the cradle first. For laying out the vent, fill, level, and drain points on a poly bulk tank, our guide on tank top fitting placement strategy walks through the engineering, and if you are weighing this 20-degree angle against a steeper one, compare the trade-offs in our 30-degree vs 45-degree drainage comparison and the cone bottom angle buyer's guide. Cross-shopping brands? See our Snyder vs Norwesco vs Chem-Tainer comparison.
Chemical compatibility
This is a polyethylene tank rated to 2.0 specific gravity. The resin is recorded as HDLPE but is not yet confirmed - call 866-418-1777 and we will confirm the exact resin (HDLPE versus cross-linked XLPE) for your chemical before you order, because that choice changes what the tank will hold long-term. Always size the tank SG to your chemical's specific gravity and match your fittings and gaskets to the chemical, not just to the tank - that gasket call is the most common mistake on a chemical tank. Per the Chem-Tainer chemical-resistance chart, which is concentration- and temperature-specific, the following are compatible at the listed concentrations. Note the chemicals that demand Viton, Aflas, or CPVC instead of the default EPDM/PVC:
- Acetic Acid (60%) - PP/PVC fittings, EPDM gaskets
- Aluminum Sulfate (50%) - PVC fittings, EPDM gaskets
- Calcium Chloride (40%) - PVC fittings, EPDM gaskets
- DEF (32.5%) - 316SS fittings, EPDM gaskets
- Ethylene Glycol (100%) - PVC fittings, EPDM gaskets
- Ferric Chloride (50%) - PVC fittings, EPDM gaskets
- Ferric Sulfate (60%) - PVC fittings, EPDM gaskets
- Ferrous Sulfate (20%) - PVC fittings, EPDM gaskets
- Hydrochloric Acid (37%) - PVC fittings, Viton gaskets
- Hydrofluoric Acid (48%) - PP/PVC fittings, Viton gaskets
- Hydrofluosilicic Acid (26%) - PP/PVC fittings, Viton gaskets
- Hydrogen Peroxide (50%) - PVC fittings, Viton gaskets
- Magnesium Chloride (30%) - PVC fittings, EPDM gaskets
- Peracetic Acid (30%) - 316SS fittings, Aflas gaskets
- Phosphoric Acid (85%) - PVC fittings, Viton gaskets
- Polyaluminum Chloride - PVC fittings, EPDM gaskets
- Potassium Carbonate (50%) - PVC fittings, EPDM gaskets
- Potassium Hydroxide (saturated) - PVC fittings, EPDM gaskets
- Propylene Glycol - PP/316SS fittings, EPDM gaskets
- Sodium Bisulfate - PVC/PP fittings, EPDM gaskets
- Sodium Bisulfite - PVC/PP fittings, EPDM gaskets
- Sodium Carbonate (30%) - PVC fittings, EPDM gaskets
- Sodium Hypochlorite (<16.5%) - PVC fittings, Viton gaskets
- Sodium Thiosulfate (40%) - PVC fittings, EPDM gaskets
- Sulfuric Acid (98%) - CPVC fittings, Viton gaskets
- Urea Solution (50%) - PP/PVC fittings, EPDM gaskets
- Zinc Orthophosphate - PP/316SS fittings, EPDM gaskets
- Ozonated Water (up to 10 PPM) - PVC fittings, EPDM gaskets
The bolded rows are where the fitting or gasket material shifts off the default - sodium hypochlorite, sulfuric acid, the peroxides, and the acids call for Viton, Aflas, CPVC, or 316SS rather than EPDM/PVC, and getting that wrong is what fails a chemical tank early. Confirm your exact concentration and temperature against the OEM chart and our full Chemical Compatibility Database before ordering fittings.
Freight and ordering
This tank ships LTL freight, quoted live to your ZIP from the nearest stocking plant - Delano, MN or West Babylon, NY. On a small 30 gallon unit, freight can be a meaningful share of the freight cost, especially if you are far from both plants, so run your destination through our Freight Cost Estimator before you decide rather than after. You can also call 866-418-1777 and we will quote freight and confirm the resin and fitting plan for your chemical. See the technical drawing on this page for fitting and dimensional detail, and reach out before you order if you want us to verify the tank against your application.
