The Enduraplas 870 Gallon Green Cone Bottom Tank (SKU THC00870G) is built for full-drain bulk chemical service where you cannot afford settled solids or a heel left in the tank. The cone-shaped bottom drives contents toward a single low outlet, so batching, dosing, and total cleanout all happen by gravity. The spec that governs everything here is the 1.9 specific-gravity rating: this is the top of the polyethylene cone-bottom range, which is why one tank covers the heaviest, most concentrated solutions in the water-treatment list - 98% sulfuric acid, 85% phosphoric acid, and 50% ferric sulfate among them. There is no need to step up to a heavier tank; 1.9 SG is already the heavy-duty spec.
Will it work for your application?
The 870-gallon green Enduraplas cone tank stands 85 in. tall on a 60 x 60 in. footprint, so plan stand height and overhead clearance for fill, vent, and gauge access before delivery. The number that will make or break your install is the rated content weight. Filled with water (1.0 SG) the contents weigh 7,256 lb; at the full 1.9 SG rating the contents reach 13,786 lb - roughly 1.9 times the water weight, nearly double. Size the steel or fabricated stand to the 13,786 lb rated load, never the water figure. A buyer who sizes the stand off the water weight under-builds it by about 6,500 lb, and that is the single most common cone-bottom mistake. Run the numbers with our Tank Sizing Calculator and the Tank Sizing Guide, then match the stand to the tank using our cone bottom tank stand compatibility matrix. Because a cone tank lives elevated on a stand, fitting and gauge placement deserve attention up front - see our guides on tank top fitting placement and tank level gauge selection for chemical service.
Chemical compatibility
This tank is molded in 1.9 SG-rated polyethylene. Our resin record lists it as HDLPE; confirm HDLPE versus XLPE with our team before placing the tank into chemical service, because that distinction changes long-term resistance. Compatibility is always concentration- and temperature-specific, so verify your exact conditions against the OEM chemical-resistance chart before you order. Within the 1.9 SG rating, this tank suits a wide range of treatment chemicals: acetic acid (60%, PP/PVC fittings, EPDM gaskets), aluminum sulfate (50%, PVC/EPDM), calcium chloride (40%, PVC/EPDM), DEF (32.5%, 316SS fittings, EPDM gaskets), ethylene glycol (100%, PVC/EPDM), ferric chloride (50%, PVC/EPDM), ferric sulfate (60%, PVC/EPDM), ferrous sulfate (20%, PVC/EPDM), hydrochloric acid (37%, PVC fittings, Viton gaskets), hydrofluoric acid (48%, PP/PVC, Viton), hydrofluosilicic acid (26%, PP/PVC, Viton), hydrogen peroxide (50%, PVC, Viton), magnesium chloride (30%, PVC/EPDM), peracetic acid (30%, 316SS fittings, Aflas gaskets), phosphoric acid (85%, PVC, Viton), polyaluminum chloride (PVC/EPDM), potassium carbonate (50%, PVC/EPDM), potassium hydroxide (saturated, PVC/EPDM), propylene glycol (PP/316SS fittings, EPDM), sodium bisulfate (PVC/PP, EPDM), sodium bisulfite (PVC/PP, EPDM), sodium carbonate (30%, PVC/EPDM), sodium hypochlorite (under 16.5%, PVC, Viton), sodium thiosulfate (40%, PVC/EPDM), sulfuric acid (98%, CPVC fittings, Viton gaskets), urea solution (50%, PP/PVC, EPDM), and zinc orthophosphate (PP/316SS, EPDM).
Match the gasket and fitting to the chemical
The tank holds the liquid; the gasket and fitting are what fail first if you pick wrong, so read the per-chemical material calls above. Three gasket regimes cover the list: EPDM for the salts, glycols, and caustics (most chemicals here), Viton for the oxidizers and strong acids (sodium hypochlorite, hydrogen peroxide, hydrochloric, hydrofluoric, hydrofluosilicic, phosphoric, and sulfuric acid), and Aflas for peracetic acid, the lone outlier. Watch for the metallic-fitting exceptions too: DEF and peracetic acid call for 316SS, and propylene glycol and zinc orthophosphate run PP/316SS, while everything else uses PVC, CPVC, or PP. Match the fitting and gasket exactly. Cross-check every chemical, including ozonated water (up to 10 PPM, PVC, EPDM), on our Chemical Compatibility Database. For bulk polyethylene storage, plan your hazard placards early with our tank label and signage compliance guide, which reconciles NFPA 704, GHS pictograms, and OSHA HazCom into one marking scheme. Reference the technical drawing on this page for fitting locations and dimensional detail before you finalize your install.
This cone bottom tank ships LTL freight from the Enduraplas plant in Neche, ND, quoted live to your ZIP code. Get a real number now with our Freight Cost Estimator, or call 866-418-1777 and we will quote it with you. Confirm the resin grade and your chemical's exact concentration with our team before you order, and we will make sure this 870-gallon cone bottom tank is the right fit for your chemical and your stand.
