150 Gallon Plastic Water Storage Tank: Complete Buyer's Guide
A 150-gallon potable water tank from Norwesco, seamlessly rotomolded from FDA-grade polyethylene — a clean, ground-shippable reserve for cabins, shops, and standby supply.
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 1.0 — the tank is engineered for liquids up to 1.0× the density of water (water is about 8.34 lb/gal). Confirm your fluid’s SG before storage.
Installation and Setup Guide
A 150-gallon tank sits right at the edge of one-person handling: easy to position empty, substantial once filled. Treat the setup as you would any standing tank — a true base and a short, flexible plumbing tail — and it is a fit-and-forget install.
Site Preparation
Stand this tank on a firm, level surface that supports the entire bottom: a concrete floor, a compacted gravel pad, or a rated platform. The whole base needs even contact — a tank tilted onto one edge by a stone or a warped board puts an unnecessary stress into the bottom corner. Clear and level the spot before delivery.
Placement and Connections
A foot of clearance all around lets you reach the fitting and the lid comfortably. Plumb the outlet by the shortest run, and put a short flexible connector between the tank and your rigid pipe so the shell's thermal movement never works the threads loose.
Venting
Give the tank a screened lid vent. As you draw water down, air has to come in to replace it; without a vent the wall can pull inward under the suction. The vent also keeps insects out of the stored water.
Maintenance and Long-Term Care
A 150-gallon poly tank needs only a brief seasonal check to stay reliable.
Quarterly Inspection Checklist
- Visual: look the shell over for any bulge or a weep at the fitting.
- Fitting: hand-snug the outlet, a quarter turn past finger-tight, no wrench on poly threads.
- Base: confirm it still stands flat and level.
- Vent: make sure the lid vent is clear.
Cleaning
For drinking water, sanitize once a year. Drain the tank, add unscented bleach at roughly a quarter cup per 15 gallons of fresh water, allow a couple of hours of contact, and rinse until the chlorine smell is gone. A yearly flush keeps sediment and bacteria from establishing in the bottom.
UV and Weather Protection
If the tank stands in open sun, glance at the exposed face once a year for fading and keep it shaded where you can. Shade meaningfully extends the service life of any poly tank in a high-sun climate.
Alternatives and Comparisons
The 150-gallon water tank is a tidy mid-small reserve — bigger than a portable jug, smaller than a yard cistern. Want it to travel? A transport-style tank in this volume rides better loaded. Want it in a basement? The doorway tanks are built to clear a standard frame. For a larger standing reserve in a similar spot, the 175- and 250-gallon water tanks are the next steps.
Other -Gallon Options
Frequently Asked Questions
How long will the 150 Gallon Plastic Water Storage Tank last?
Used within its ratings and protected from relentless sun, expect 15 years and more from this tank. A seamless molded shell has no joint to fail, so foundation and UV exposure are what govern its real-world lifespan.
What chemicals can I store in this tank?
It is meant for potable water and is FDA-cleared for drinking water and food-grade liquids, and it can hold light compatible solutions. Keep fuels, solvents, and flammables out, and check any chemical on a compatibility chart before filling.
Does this tank come with a warranty?
Norwesco warrants it against manufacturing defects under normal use — molding flaws, pinholes, and factory fitting defects. Not covered: misuse, incompatible chemicals, or impact. Keep your receipt for any claim.
Can I install this tank underground?
No — it is an above-ground tank whose walls are not engineered for soil pressure. A buried installation requires a tank built for underground use.
Buying Considerations
Confirm two things before ordering: a flat, firm base that supports the whole bottom, and that your contents are potable water or another compatible liquid. Delivery is easy — this tank ships UPS or FedEx ground and typically arrives within 5 to 7 business days.
Related Products You May Need
Questions? Call (866) 418-1777 — our team knows these products inside and out and can help you select the right tank for your application.
Recommended Tanks for This Guide
Live pricing, updated automatically · estimate freight to your ZIP.
