200 Gallon Plastic Water Storage Tank - Black (30" x 72"): Complete Buyer's Guide
200-gallon black water storage tank built for safe potable water storage. Manufactured by Norwesco from virgin linear polyethylene (HDPE) rated to handle liquids up to 9.2 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 1.1 — the tank is engineered for liquids up to 1.1× the density of water (water is about 8.34 lb/gal). Confirm your fluid’s SG before storage.
Product Overview
The 200 Gallon Plastic Water Storage Tank in black is the right answer when you need a real water reserve but only have a narrow strip of ground to give it. At 72 inches tall on a 30-inch base, it stands like a column rather than sprawling like a drum — useful against a wall, in a pump house, or tucked beside equipment where floor space is precious.
The body is rotationally molded in one piece from virgin linear polyethylene, leaving no seam or weld to fail. Its 1.1 specific gravity rating covers liquids to 9.2 pounds per gallon, which is everything you would put in a water tank and then some. The black wall keeps sunlight off the resin and out of the water, so algae has nothing to feed on inside.
Empty, the tank is an easy 49 pounds to position; full, it carries about 1,884 pounds onto its small 4.9-square-foot footprint — and that concentration is exactly why a slim 72-inch tank needs a flat, firm base under it. A factory 2-inch NPT outlet feeds your plumbing and an 8-inch lid gives access for fill, venting, and a level sensor or small pump.
Key Features and Specifications
- 200-gallon capacity — sized for safe potable water storage
- Constructed from virgin linear polyethylene (HDPE) with 1.1 specific gravity rating — handles liquids up to 9.2 lbs/gal
- 72" tall x 30" diameter — compact vertical footprint
- 49 lbs empty, approximately 1,884 lbs when full at rated specific gravity
- 2" NPT outlet fitting — factory installed and leak-tested
- 1-1/2" PP Female NPT Bulkhead Fitting NPT inlet fitting included
- 8" 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
- UV-resistant black pigmentation provides maximum outdoor durability and inhibits algae growth in stored liquids
- 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 on a pallet — residential delivery with lift gate available
Installation and Setup Guide
Read this 200-gallon tank's geometry before you touch it: 72 inches of height on a 30-inch base means the full load — roughly 1,884 pounds — bears down through less than five square feet. A tall, narrow column concentrates weight and is more sensitive to a tilted base than a squat tank is, so the install priorities are a dead-flat pad and protection against tipping, in that order.
Site Preparation
Set it on a level four-inch concrete pad or a small, well-compacted stone bed sized a few inches wider than the 30-inch base in every direction. Flatness matters more here than on a wide tank: a slim 72-inch shell that leans even slightly walks its load to one edge of the floor and stresses the lower wall. If the tank stands anywhere it could be bumped, strap the upper body to a wall or post.
Placement and Connections
Plumb the discharge off the factory 2-inch outlet and keep the run direct. Use a flexible connector for the first short section rather than rigid pipe — a tall poly column shifts more at the top than the bottom as it fills and warms, and a rigid line telegraphs that into the bulkhead. Snug the threads by hand plus a quarter turn and leave the wrench in the box.
Venting
Even at 200 gallons the tank has to breathe, and the 8-inch lid is the breathing path. Keep its vent open and screened so air flows in as you draw down and out as you fill; on a slim shell a small vacuum from a blocked vent can pull the upper wall inward fast. Never seal the lid tight against a closed system.
Maintenance and Long-Term Care
Maintaining 200 gallons of potable water is quick work, and the black wall does part of it by keeping the interior dark. The point of the routine below is to keep that small reserve fresh — a tank this size turns over slowly enough that stale water, not structural trouble, is the usual complaint.
Quarterly Inspection Checklist
- Column check: Look up and down the 72-inch wall for any bow or lean; on a tall tank a slight tilt at the base shows as a curve up top.
- Outlet feel: Run a hand around the 2-inch bulkhead for weeping and re-snug by hand if it has crept loose.
- Base level: Confirm the small pad has not settled on one side, which a narrow tank punishes more than a wide one.
- Vent and 8-inch lid: Verify the screened vent is clear and the lid gasket seats so nothing gets into the stored water.
Cleaning
Drain the 200 gallons through the bottom outlet at least once a year, rinse, then sanitize with about a quarter cup of unscented bleach per fifteen gallons on the refill, holding it roughly two hours before flushing the chlorine out. Because the volume is small, the water turns over slowly, so the annual sanitize matters more here than on a tank you empty constantly.
UV and Weather Protection
The black resin shrugs off sunlight better than any lighter tank, but UV stabilizer still depletes over years. If this column sits in full sun, glance over the bright side annually for chalking; a tank this small is also easy to shade or relocate into partial cover if you want to extend its life further.
Alternatives and Comparisons
Two hundred gallons in a 30-inch black column is built for tight, vertical spaces, but it is one of several ways to get a couple hundred gallons of reserve. A wider, shorter 200-gallon tank trades the slim footprint for more stability; a larger tank steps the reserve up if the floor allows it. The choices below help you match shape to the space you actually have.
Other 200-Gallon Options
Frequently Asked Questions
How long will the 200 Gallon Plastic Water Storage Tank - Black (30" x 72") last?
Treated decently — flat base, fills within rating, the light annual sanitize — this black 200-gallon tank lasts well into the fifteen-year-plus range. Its one-piece wall has nothing to delaminate and the black UV package is the toughest available; what shortens a slim tank's life is a leaning base or stagnant water, never the resin.
What chemicals can I store in this tank?
It is made and FDA-approved for potable water and food-grade liquids and will hold lighter solutions within its 9.2-pound-per-gallon limit. Keep flammables, fuels, and solvents out, and verify any chemical on a poly compatibility chart first, since a few oxidizers attack polyethylene even though most acids and bases do not.
What kind of foundation does a 200-gallon tank need?
For a slim 200-gallon column loading roughly 1,884 pounds through a narrow 30-inch base, a flat, firm four-inch concrete pad or a well-compacted stone bed, level to a quarter inch, is the foundation it needs. Flatness counts most here, since a tall tank on an uneven base leans and forces the load onto one edge of the lower wall.
Does this tank come with a warranty?
Yes. Norwesco's 3-year warranty covers manufacturing defects under normal use — factory cracks, pinholes, and fitting faults — but not overloading past 1.1 SG, a tipped or poorly set tank, chemical damage, or impact. Keep your receipt and a photo of the install.
Can I install this tank underground?
No. This is an above-ground tank with a flat wall that cannot take soil pressure; burying it would crush it and void the warranty. For below-grade water storage use a ribbed underground cistern engineered for burial.
Buying Considerations
Confirm three things first: that a 72-inch-tall tank clears your ceiling or roofline where it will stand, that the narrow base can sit on a genuinely flat pad since slim tanks punish slope, and that you have a way to strap or brace it if it lives somewhere it might be knocked.
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