The Enduraplas 6000 Gallon Black Cone Bottom Tank (SKU THC06000B) is a full-drain bulk vessel built for chemical service, molded in black polyethylene rated to 1.9 specific gravity. At 195 inches tall on a 110 x 110 inch footprint, it holds 6,000 gallons and drains completely through its cone, which is why operators choose a cone bottom tank over a flat-bottom vertical for batching, settling, and dosing applications where you cannot leave heel behind. The 1.9 SG rating is the headline number: it means the resin and wall thickness are validated for liquids up to roughly 1.9 times the density of water, covering most concentrated acids and brines rather than just water.
Will it work for your install
Plan the pad and stand around the loaded weight, not the empty shell. Filled with water this tank weighs about 50,040 lb; filled to its maximum rated 1.9 SG contents it reaches roughly 95,076 lb. Because a cone bottom carries all of that on a supporting stand rather than directly on the ground, the stand and foundation must be engineered for the full max-rated load. At 16.25 ft tall on a 9.17 ft square footprint, plan overhead clearance and wind or seismic anchoring for the stand - this is a tall vessel, and the loaded center of gravity sits high on the support structure. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm the contents weight for your specific chemical's gravity, and review the Cone Bottom Tank Stand Compatibility Matrix before you order a stand. The 6000 Gallon 15 Degree Cone Bottom Tank buyer's guide walks through the sizing and outlet decisions. Fitting sizes and locations are not published in our spec data for this model, so confirm outlet, fill, and vent sizing with us before ordering and we will match the fittings and gaskets to your chemical. See the technical drawing on this page for the dimensions we do have.
Chemical compatibility
This tank is polyethylene rated to 1.9 specific gravity, which is the highest density rating offered in polyethylene - there is no higher-SG poly tank to step up to, so if your chemical exceeds 1.9 SG the tank is the wrong material class and you should call us before buying. The resin is recorded as HDLPE with a trailing question mark in our data, so confirm HDLPE versus XLPE with us before committing to chemical service; crosslinked and linear polyethylene behave differently with certain oxidizers, and the right grade matters. Compatibility below is drawn from the OEM chemical-resistance chart and is always concentration- and temperature-specific; verify your exact concentration and operating temperature on the linked pages before you buy.
Within the 1.9 SG envelope this tank suits a broad range of water-treatment and industrial chemicals. Acids include acetic acid (60%, PP/PVC fittings, EPDM gaskets), hydrochloric acid (37%, PVC, Viton), hydrofluoric acid (48%, PP/PVC, Viton), hydrofluosilicic acid (26%, PP/PVC, Viton), phosphoric acid (85%, PVC, Viton), and sulfuric acid (98%, CPVC, Viton). Coagulants and salts include aluminum sulfate (50%), ferric chloride (50%), ferric sulfate (60%), ferrous sulfate (20%), calcium chloride (40%), magnesium chloride (30%), polyaluminum chloride, and zinc orthophosphate (all PVC or PP/316SS, EPDM). Bases and reducers include sodium carbonate (30%), potassium carbonate (50%), potassium hydroxide (saturated), sodium bisulfate, sodium bisulfite, and sodium thiosulfate (40%) on PVC/PP with EPDM. Oxidizers demand Viton seals: hydrogen peroxide (50%, PVC) and sodium hypochlorite (under 16.5%, PVC) - the classic mistake on a bleach tank is fitting it with EPDM instead of Viton and watching the seals degrade. Peracetic acid is the outlier in this set: peracetic acid (30%) requires 316 stainless fittings and Aflas gaskets, not the PVC and EPDM that cover most of the others. Fluids and glycols include DEF (32.5%, 316SS fittings, EPDM), urea solution (50%, PP/PVC), ethylene glycol (100%, PVC), and propylene glycol (PP/316SS), plus ozonated water up to 10 PPM (PVC, EPDM). For DEF storage, note the 316 stainless requirement on wetted fittings - DEF attacks ordinary steel and brass, so plastic or 316SS is the rule with EPDM seals. Match the fitting and gasket material to your chemical exactly; the wrong elastomer is the most common and most expensive error on a chemical tank. Full data and concentration limits live in the Chemical Compatibility Database.
Instrumentation and labeling
A 6,000-gallon black tank standing over 16 feet tall needs reliable level measurement and correct hazard labeling from day one. For choosing a gauge that survives the chemical you are storing, see Tank Level Gauge Selection for Chemical Service, and for NFPA 704, GHS, and DOT placard placement on bulk polyethylene storage, see the bulk storage labeling and signage compliance guide.
This cone bottom tank ships LTL freight from the Enduraplas plant in Neche, ND, quoted live to your ZIP. Get a freight estimate instantly with our Freight Cost Estimator, or call 866-418-1777 to lock in your stand, fittings, and delivery together. Confirm your resin grade and chemical concentration with us first, and we will make sure the tank, gaskets, and fittings are matched to your service before it leaves the yard.
