Rectangular polyethylene tanks deliver maximum capacity-per-square-foot in narrow alcoves, service closets, equipment rooms, and pickup beds where cylindrical tanks won't fit. The right-angle geometry stores 27% more fluid in the same footprint as an equivalent-volume cylindrical tank. Catalog covers Norwesco, Snyder Industries, Chem-Tainer, Enduraplas, and Bushman rectangular SKUs from 25-gallon utility through 1,000-gallon commercial.
Applications
Pickup-bed transport (square footprint maximizes bed usage)
Pest Control Operator (PCO) service tanks — fits behind cab between wheel wells
Narrow-alcove residential and commercial water storage
Industrial flat-bottom holding where floor space is the constraint
Battery / process bath service — square geometry simplifies rack design
Compliance & Standards
Typically rotomolded to ASTM D1998; FDA 21 CFR 177.1520 resin compliance varies by model (see each product's Specifications). Rectangular tanks experience higher hoop stress per gallon than cylindrical tanks of equal capacity — wall thickness is increased to compensate, which is why rectangular tanks weigh more per gallon. Confirm SG rating against your fluid; never exceed.
Engineering & Selection
Three factors drive rectangular tank selection. (1) Flat-bottom support: rectangular tanks must sit on a full-footprint flat surface — never on a partial pad or uneven floor. (2) Top-fill geometry: most rectangular tanks have a lid or manway on the top short axis — verify orientation against your fill plumbing. (3) Outlet location: usually a sidewall fitting near the bottom; confirm height above floor for gravity drain or pump suction.
Freight & Delivery
Tanks ship LTL motor freight from the closest stocking warehouse to your delivery ZIP. Typical transit 5–10 business days. Liftgate available at delivery (per-shipment fee). Always inspect at delivery and note damage on the bill of lading before signing — that is the carrier claim trigger. Bulk-order consolidation reduces per-tank freight 25–40%. Get your LTL freight quote by ZIP, or call 866-418-1777 for same-business-day quoted pricing.
Sizing & Selection
Measure your alcove or pickup-bed footprint first, then pick the largest capacity that fits with 1" clearance on each side. Sidewall fittings can be specified for left, right, or front. 866-418-1777.
Fifty-five gallons under 15 inches of height: the B528 spreads its volume across a footprint just over 34 inches long by 28.5 inches wide, so serious capacity fits where a tall tank never could. This...
The Chem-Tainer 62 Gallon PE Rectangular Open Top Tank is a compact, open-top polyethylene tank for batching, washdown, parts soaking, secondary capture, and general water storage where you need easy...
The Chem-Tainer 37 Gallon PE Rectangular Open Top Tank is a compact polyethylene rectangular vessel built for batching, washdown, parts-soaking, and small-volume water handling where an open top...
Forty-five gallons is the capacity that turns a coastal boat into a passagemaker on paper - enough fresh water to stop planning stops around taps. The Ronco Plastics B155 packages it in a one-piece...
Order the potable set and this is your fresh water tank; order the sanitation set and it is your gray or black holding tank - same molding either way.
It ships at 98 lb bare and carries about 292 lb...
Gray water is the tank people forget to plan, and the B445 is a strong candidate for the job: 35 gallons in a thick 102 lb shell that shrugs off the warm, soapy, grease-laced discharge that galley...
Sixty gallons in a compact, deep-bodied molding: the Ronco Plastics B474 stacks its volume vertically rather than sprawling, which suits lazarettes, cockpit lockers, and machinery-space corners where...
The Chem-Tainer 75 Gallon PE Rectangular Open Top Tank is a straight-sided, open-top polyethylene vessel built for water-service duty: bench-level batching, parts washing, rinsing, soaking, and...
The 9W is 44 gallons of fresh water in a four-foot rectangle - 48 x 20 x 12 inches - at an empty weight of just 27 lb. That last number is the story: one person carries this tank to the bay, holds it...
The B456 spreads 40 gallons across a 37.75 x 22.25 inch footprint while standing just over a foot tall - a low, broad molding that slips under berth flats and dinette seats where a taller 40 gallon...
At 33.25 x 24.5 x 15 inches and just 40 lb, the Ronco Plastics B507 is the rare 47 gallon tank that one person can carry into place. The mid-height format splits the difference between pancake tanks...
The B531 stretches 71 gallons into a 63.25-inch-long molding about 23 inches wide and just 12.5 inches tall - proportions drawn for the underfloor of an RV or the long shallow tunnel of a boat's tank...