| Capacity | 250 US gallons / 946 liters / 33.4 cubic feet |
| Weight Empty | 50–70 lbs (poly) · varies by material and brand |
| Weight Full | ~2,086 lbs (water only) · ~2156 lbs total loaded |
| Typical Dimensions (Vertical) | 46" dia × 46" H (Norwesco standard) |
| Typical Price Range | $200–$480 (poly) |
| Common Materials | Polyethylene (HDPE), Fiberglass, Galvanized steel |
| Common Uses | Family emergency backup, livestock, pressure washing, small farm |
| Potable Water Rated? | Yes — when specifically labeled for potable use (HDPE tanks) |
Who Needs a 250 Gallon Water Tank?
The 250-gallon tank is where residential storage starts getting serious. At over a ton when full, it requires a permanent or semi-permanent installation — this isn't a tank you move around easily. But for families who want meaningful emergency backup, small-scale farming operations, or a contractor rig that doesn't need a refill mid-day, 250 gallons hits a practical threshold.
- Emergency backup (family of 4): Provides approximately 20+ days of supply at a realistic 3 gallons per person per day — enough to cover most regional emergency scenarios.
- Pressure washing (fully independent): Supports a full day for most contractors at 4–5 GPM without any hookup to customer water.
- Livestock: Weekly supply for goats, sheep, or small cow/horse operations with a float valve system.
- Fire suppression staging: A minimum threshold tank for residential defensible space water supply alongside a pump.
Dimensions by Style
| Style | Diameter / Width | Height / Length | Best Use | Brand |
|---|---|---|---|---|
| Vertical Round | 46" dia | 46" H | Stationary storage | Norwesco, Snyder |
| Horizontal Transport | 36" dia | 90" long | Truck bed, trailer | Norwesco, Chem-Tainer |
| Leg Tank | 46" dia | 46" H + legs | Elevated gravity feed | Norwesco |
| Dimensions are approximate. Confirm with manufacturer spec sheet before ordering. | ||||
Material Options
Polyethylene (HDPE) — Best for Most Uses
High-density polyethylene is the right material for 250-gallon water storage in most applications. It's rotationally molded (seamless), UV-stabilized in black versions, and FDA-approved for potable water storage when labeled. Norwesco and Snyder are the two dominant US manufacturers — both use virgin resin and offer potable-rated versions.
- Seamless — no welds or seams to fail
- Lightweight relative to capacity
- FDA-approved for potable water (when labeled)
- No rust or corrosion
- Best cost-to-capacity ratio
- 20–30 year lifespan with proper care
- Degrades with prolonged UV exposure (use black UV-stabilized tanks outdoors)
- Not suitable for fuels, solvents, or chemicals
- Requires freight delivery at this size
- Large tanks need equipment to unload
Corrugated Steel
At 250 gallons, corrugated steel tanks exist but poly is typically better value unless you specifically need the durability of steel or a panel-assembled configuration for your site. Steel requires a food-grade liner for potable water and the liner needs replacement every 10–20 years. For pure water storage, poly is the better choice at this size.
Top 250 Gallon Water Tank Picks (2025)
Where to Buy a 250 Gallon Water Tank
| Retailer | Typical Price | Shipping | Notes |
|---|---|---|---|
| Tank Depot | ~$299–$369 | Freight delivery | Best selection; multiple styles and fittings options |
| Amazon | ~$269–$339 | Freight for this size | Competitive pricing; check seller ratings carefully |
| Tractor Supply Co. | Varies | In-store or delivery | Stocks smaller sizes; call ahead for 250 gal availability |
| Local Farm Supply / Co-op | Varies | Local pickup | Often cheapest; limited to standard configurations |
| This size ships freight — confirm delivery access and unloading equipment before ordering. | |||
Installation Notes
At 2,086 lbs when full, proper installation matters. Key considerations:
- Foundation: Flat, level, compacted surface. Concrete pad strongly recommended for permanent installations. Compacted gravel is acceptable for lighter use.
- Delivery: This size ships via freight flatbed. You'll need a tractor with front loader, forklift, or pallet jack to move the tank off the truck. Coordinate equipment before the delivery date.
- Plumbing: Standard outlet is 46" NPT. Budget for a ball valve, 50 mesh strainer, and appropriate hose fittings.
- Permits: Usually not required for residential aboveground tanks under 5,000 gallons. Check with your county if the tank connects to a potable plumbing system.
Frequently Asked Questions
A standard vertical round 250-gallon poly tank (Norwesco) measures approximately 46 inches in diameter and 46 inches tall for a standard vertical poly tank (Norwesco). Note: at this size the tank is wide and relatively short — it has a lower center of gravity than taller configurations..
Water weighs 8.345 pounds per gallon. A full 250-gallon tank contains approximately 2,086 pounds of water. Add the tank's empty weight (50–70 lbs for poly) for a total loaded weight of roughly 2156 lbs.
Standard poly 250-gallon tanks cost $200–$480 depending on brand and retailer. Norwesco runs ~$299–$369; Snyder is slightly cheaper at ~$269–$339. Freight delivery adds $75–$200 depending on your location. Fiberglass alternatives start significantly higher.
Yes, provided the tank is specifically rated for potable water. Look for tanks labeled "FDA-approved," "NSF/ANSI 61," or "safe for drinking water." Both Norwesco and Snyder offer potable-rated 250-gallon tanks. Never use a tank previously used for chemicals, even if cleaned.
A quality Norwesco or Snyder tank carries a 3-year warranty but realistically lasts 20–30 years with proper care. Use black UV-stabilized tanks outdoors, don't store empty in freezing temperatures, and inspect outlet fittings annually for stress cracks.