1000 Gallon Doorway Water Tank: Complete Buyer's Guide
1,000-gallon white doorway tank built for tight-access indoor liquid storage. Manufactured by Norwesco from virgin linear polyethylene (HDPE) rated to handle liquids up to 12.5 pounds per gallon. FDA approved for contact with potable water, ensuring safe storage for drinking water and food-grade liquids.
Specifications at a Glance
Every figure below is pulled straight from the live product record for this exact tank — the same data on the product page, so what you read here and what you buy never disagree.
Standards & Materials
- ASTM D1998 — Standard Specification for Polyethylene Upright Storage Tanks. Governs wall-thickness and hydrostatic design for vertical rotomolded poly tanks of this class.
- FDA 21 CFR 177.1520 — Olefin polymers. The food-contact regulation the FDA-grade resin in this tank is compounded to meet.
- Specific gravity rating 1.5 — the tank is engineered for liquids up to 1.5× the density of water (water is about 8.34 lb/gal). Confirm your fluid’s SG before storage.
Product Overview
The 1,000 Gallon Doorway Water Tank proves you can put serious capacity inside a finished building. At 40 inches wide it is broader than the small doorway tanks but still passes through a double doorway or a wide single opening, bringing a thousand gallons of storage into a basement, a barn, a greenhouse, or an interior mechanical room where a round tank of this size has no chance of entering. It is the high-volume answer for indoor storage.
Norwesco rotationally molds the body in one seamless piece of virgin linear polyethylene rated to 1.5 specific gravity, so it holds water and water-based liquids up to 12.5 pounds per gallon. The translucent natural-white wall reads the level at a glance and reflects light to keep the contents cooler, with molded-in UV protection and a 120 F / 48 C ceiling for outdoor service.
It measures 92 inches long, 40 inches wide, and 89 inches tall, weighs 384 pounds empty, and reaches about 12,894 pounds full at 1.5 SG. The factory 2-inch NPT outlet includes a 2-inch siphon for drawing down to the bottom, and the 16-inch lid serves for filling, venting, and access. Norwesco's 3-year warranty against manufacturing defects backs the tank.
Technical Drawing
Official Norwesco technical drawing — 1000 Gallon Doorway Water Tank
Key Features and Specifications
- 1,000-gallon capacity — sized for tight-access indoor liquid storage
- Constructed from virgin linear polyethylene (HDPE) with 1.5 specific gravity rating — handles liquids up to 12.5 lbs/gal
- 92" long x 40" wide x 89" tall
- 384 lbs empty, approximately 12,894 lbs when full at rated specific gravity
- 2" fitting with 2" siphon NPT outlet fitting — factory installed and leak-tested
- 16" lid opening for fill, venting, and interior access
- FDA approved for potable water and food-grade liquid contact
- 3 Year Warranty from Norwesco against manufacturing defects
- Translucent white walls allow visual level monitoring without opening the tank and reflect sunlight to keep contents cooler
- Rated for continuous service up to 120 F / 48 C
- Seamless one-piece rotational molding — no seams, no welds, no leak points
- Manufactured by Norwesco — a leading name in rotomolded polyethylene tanks
- Place on a firm, level surface free of rocks or sharp objects that could damage the tank bottom. Ensure adequate ventilation if stored chemicals produce vapors
- Ships via LTL freight — allow 2-3 weeks for delivery. Lift gate and residential delivery available at additional cost
Installation and Setup Guide
A thousand-gallon doorway tank is the most demanding of the family to install, because it pairs a wider 40-inch body with a near-13,000-pound full weight. Both numbers shape the work: the width governs how it gets in, and the weight governs what it sits on.
Getting It Through the Door
The 40-inch width clears a double doorway or a wide single opening, but it will not pass a standard 32-inch door, so verify your access route carefully — openings, hall turns, and the 89-inch height against your ceilings and stair clearances. Empty, the tank weighs 384 pounds, so plan on several people or a powered dolly and a fully cleared path to move it into position.
Supporting the Load
Full, the tank presses down at roughly 12,894 pounds — over six tons — on a rectangular footprint. Indoors that almost always means a ground-floor concrete slab; a framed or upper floor is unlikely to carry six tons concentrated this way without engineered reinforcement, so confirm the structure before siting. Set the tank dead level on a clean, firm surface, flush to a wall to save space.
Plumbing and Venting
The 2-inch outlet comes with a siphon that draws the tank down to the bottom, which is useful for getting full use of the volume; plumb it with a flexible first foot and a shutoff valve. Fit a screened vent in the 16-inch lid sized to your draw rate, because a tank holding a thousand gallons moves real volumes of air and will dent if a pump outpaces an undersized breather.
Maintenance and Long-Term Care
As a water tank, this one takes proper potable maintenance, and its indoor placement keeps the routine clean and weather-free even at a thousand gallons.
Inspection
- Wall and level: Backlight the translucent white wall to read the level and watch for any bulge, especially low on the wall where the pressure from a tall column peaks.
- Floor: Confirm the slab shows no distress under six tons and that the tank remains level.
- Outlet, siphon, and vent: Check the 2-inch fitting and siphon for weeping, hand-snug if needed, and keep the vent screen clear.
Annual Sanitizing
For drinking-water duty, drain the tank yearly, flush the sediment, and disinfect before refilling with the potable standard — a quarter cup of unscented bleach per fifteen gallons, held two hours, then drained and rinsed until the chlorine smell is gone. The siphon outlet helps you draw the tank down completely for a thorough flush. If you store a water-based solution, follow its cleaning guidance before switching contents.
Indoor Benefit
Behind walls the wall sees no UV, so the resin ages very slowly, and a conditioned space removes any freeze risk. Steady indoor temperatures also keep a large stored volume fresher than an outdoor tank baking in summer sun.
Alternatives and Comparisons
At a thousand gallons the doorway form is doing something unusual — bringing bulk capacity indoors — so the comparison is really about access versus efficiency.
Wide doorway tank vs. round bulk tank: A round 1,000-gallon tank stores more gallons per square foot and costs less, but at roughly five feet across it cannot enter a finished building through any normal opening. This doorway tank accepts a slimmer 40-inch profile precisely so it can be installed inside after construction, which a round tank cannot. Against the smaller 400- and 500-gallon doorway tanks, this one more than doubles the indoor reserve, at the cost of needing a wider opening and a floor that can carry six tons. Choose it when you need real volume indoors and have the door and the slab to support it.
Other 1000-Gallon Options
Frequently Asked Questions
How long will the 1000 Gallon Doorway Water Tank last?
Installed indoors on a sound slab and within its 1.5 SG and 120 F ratings, this tank can exceed the usual 15-to-20-year span because it is shielded from sun and weather. The molded-in UV protection faces little load behind walls and the seamless shell has no joint to fail. Periodic draining and sanitizing keeps a large stored volume fresh over the long haul.
What chemicals can I store in this tank?
It is a water tank rated to 1.5 specific gravity, so potable and general water storage is its main role, and it can hold water-based liquids up to 12.5 pounds per gallon within that density. It is not suited to fuels, solvents, or flammable liquids. Confirm any non-water liquid against a polyethylene compatibility chart before filling.
What kind of foundation does a 1000-gallon tank need?
A full 1,000-gallon doorway tank weighs about 12,894 pounds — over six tons — on a rectangular footprint. That essentially requires a ground-floor concrete slab; a framed or upper floor cannot carry six tons concentrated this way without engineered reinforcement. Keep the surface flat and clear so the bottom is evenly supported.
Does this tank come with a warranty?
Yes. Norwesco provides a 3-year warranty against manufacturing defects in materials and workmanship under normal use, covering molded-in faults rather than damage from overloading beyond the rated specific gravity, an inadequate floor, incompatible liquids, or impact. Keep your receipt and a photo of the installation.
Can I install this tank underground?
No. This is an above-ground tank and its walls cannot withstand soil pressure; burying it would risk collapse and void the warranty. For below-grade water storage, our reinforced underground cisterns are built for that load.
Buying Considerations
Three things to settle before this 1,000-gallon doorway tank ships. First, access: the 40-inch width needs a double or wide single doorway, so measure every opening, turn, and the 89-inch height against your ceilings. Second, the floor, which must carry roughly 12,894 pounds full — a ground-floor slab in nearly every case, not a framed floor. Third, your plumbing, matched to the 2-inch outlet with its built-in siphon. Listed at $2,469.99 before freight, quoted to your ZIP.
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