Horizontal Square Reservoir Water Tank 100 Gallon - Durable Outdoor

Our review of the RomoTech 100 gallon horizontal square reservoir finds it a practical, no-nonsense option for anyone needing portable storage of non-flammable liquids. Best for farmers, landscapers, RV owners, and emergency preppers, the tank's single biggest advantage is its rugged, UV-stabilized polyethylene construction that resists weathering and is easy to clean. The translucent square shape with molded gallon and liter markings makes level checks straightforward, while the large fill cap and integrated drain speed routine refills and emptying during field use.

Key Features

• Capacity: The 100 gallon size provides substantial on-board water or liquid storage for mobile setups without being overly bulky.
• Construction: Made from UV-stabilized, medium-density polyethylene for rustproof durability and long outdoor life.
• Serviceability: A large 5-1/2 in lid with a 5 in diameter hole plus a molded bulkhead fitting lets users refill quickly and attach hoses or pumps easily.
• Drainage: The integrated drain and 3/4 in NPT outlet enable fast emptying and convenient siphon or hose connections for daily tasks.
• Transport: Molded tie-down channels and a square profile mean it secures well in beds, trailers, or RVs and fits against flat surfaces.
• Monitoring: Translucent walls with molded gallon and liter markings give quick visual checks of remaining fluid without tools.

Who It's For

The tank is ideal for small farms, landscaping contractors, and RV owners who need dependable, portable storage for potable water, agricultural chemicals, or industrial fluids during field work or travel. It suits emergency preppers who want a weather-resistant, easy-to-clean reservoir for seasonal storage that can be moved as needed.

Those who need specialized secondary containment, pressurized systems, or storage for flammable liquids should look elsewhere; this model is specified for non-flammable liquids and works best at ambient temperatures up to about 110F.

Pros & Cons

Pros

• Sturdy UV-stabilized polyethylene construction offers good long-term outdoor durability.
• Large fill cap, integrated drain, and molded bulkhead make refilling and emptying straightforward on the job.
• Translucent, square design with volume markings simplifies checking fluid level and secure transport.

Cons

• Some users report mixed experiences with leakage, so fittings and seals should be checked after installation.
• Not suitable for flammable materials or high-temperature applications beyond the specified maximum operating contact temperature.

Specifications

Capacity	100 gallon
Material	Medium-density polyethylene, UV-stabilized
Fill opening	5-1/2 in lid (5 in diameter hole)
Outlet	3/4 in NPT
Intended liquids	Non-flammable liquids (potable water, agricultural chemicals, industrial fluids)
Features	Molded gallon/liter markings, molded tie-down channels, integrated drain, molded bulkhead fitting

Our Verdict

The RomoTech 100 gallon horizontal reservoir is a solid, value-minded choice for anyone needing portable, UV-resistant storage of non-flammable liquids. Its practical fill cap, drain, and molded fittings make everyday use simple, and the durable polyethylene body stands up to outdoor conditions, making it a good buy for farms, job sites, and RV water storage when you want straightforward functionality without extras.

Frequently Asked Questions

Can this tank hold potable water?
Yes, it is suitable for potable water and other non-flammable liquids when cleaned and maintained properly.

What fittings are included?
The tank has a molded bulkhead fitting and a 3/4 in NPT outlet for hose or pump connections; verify seals after installation.

Is it UV-resistant for outdoor use?
Yes, the tank is made from UV-stabilized polyethylene to resist sun exposure and fading during outdoor storage.