Chem-Tainer 350 Gallon 20 Degree Plastic Vertical Open Top Cone Bottom Tank with Poly Stand

The Chemtainer TC4270AP is a 350-gallon open-top, cone-bottom tank with a 20-degree cone and a matching poly stand, molded from polyethylene and rated to a 1.5 specific gravity.It stands 70 inches tall on a 42-inch diameter footprint, weighs 230 pounds empty, and handles fluids up to 140 F.The open top makes it easy to load, mix, and inspect batches, while the 20-degree cone bottom drains solids and slurries far more completely than a flat-bottom tank - the reason operators search for a 350 gallon Chemtainer vertical open top cone tank for dosing, settling, and drain-down duty.See the technical drawing on this page for the tank and stand geometry.

Will it hold what you're putting in it

Size to the weight, not just the gallons.Filled with plain water this tank carries about 2,919 pounds; loaded to its full 1.5 SG rating it reaches roughly 4,378 pounds of contents, and with the 230-pound tank itself your poly stand and slab must support close to 4,600 pounds fully loaded - all of it bearing down through the cone tip.Confirm your pad and anchoring for that point-load before filling.Run your product's real filled weight through the Tank Sizing Calculator and the Tank Sizing Guide so the stand, cone, and outlet are matched to the actual fluid, not a guess.Note that the outlet and lid size are not pre-specified on this SKU - confirm the cone-tip bulkhead fitting size and material (PVC, PP, or 316SS to match your chemical) and the open-top cover with us before ordering, since on a drain tank that fitting is the wear and leak point.

Chemical compatibility

This tank is molded polyethylene rated to 1.5 specific gravity.The resin is listed as HDLPE but not yet confirmed - confirm HDLPE versus XLPE with us before any chemical service, since crosslinked and linear polyethylene tolerate different chemistries.The compatibility below is drawn from an OEM polyethylene chemical-resistance chart (Snyder Industries), used here as a conservative reference pending Chemtainer resin confirmation; it is concentration- and temperature-specific, so verify your exact chemical, concentration, temperature, and the fitting and gasket materials before ordering.

At the 1.5 SG rating this tank suits, among others: Acetic Acid (60%), Aluminum Sulfate (50%), Calcium Chloride (40%), Ferrous Sulfate (20%), Magnesium Chloride (30%), Sodium Carbonate (30%), and Ozonated Water (up to 10 PPM).Most of these call for PVC fittings with EPDM gaskets, while Acetic Acid accepts PP or PVC.DEF (32.5%) and Urea Solution (50%) require only a 1.5 SG tank, so this 1.5-rated shell carries them with margin to spare - but DEF still needs 316SS fittings with EPDM gaskets, not PVC.Match your gasket and fitting to the specific chemical; the chart is your reference, not the tank alone.

The mistake to avoid

Don't buy this 1.5 SG tank for a heavier or more aggressive chemistry.Nineteen chemicals on the chart gate specifically at a higher 1.5 SG tank - and most also step the gasket up from EPDM to Viton.Products such as Sodium Hypochlorite (below 16.5%), Hydrochloric Acid (37%), Sulfuric Acid (98%), Hydrogen Peroxide (50%), Phosphoric Acid (85%), and Ferric Chloride (50%) all need the 1.5 SG shell with Viton gaskets, and Peracetic Acid (30%) steps up to Aflas - the 1.5 SG rating here is not enough for any of them.Confirm your chemical's SG and gasket requirement on the Chemical Compatibility Database, or call us and we'll spec the correct 1.5 SG tank.If you are early in the sizing decision, our cone-bottom buyer's guides for the 300 gallon and 550 gallon cone tanks walk through the same tradeoffs.

This tank ships LTL freight from the nearest Chemtainer plant - Merced, CA or West Babylon, NY - with the exact cost quoted live to your ZIP through our Freight Cost Estimator.For help confirming resin, SG, fittings, or freight, call 866-418-1777 and we'll spec it with you before you buy.