535 Gallon Horizontal Water Tank
Polyethelene (Poly) Tank
1.2 Specific Gravity
Constructed with durable, rotationally molded polyethyelene resin
Resistance to cracks, chips, and ruptures
UV inhibitors to protect liquid contents from direct sunlight
Indoor and outdoor use
Color: Green
 
Horizontal Leg Tanks are for storage and are not to be pressurized.

Industrial-Grade Liquid Management: The 535-Gallon Horizontal Tank
The 535-gallon horizontal water storage tank from USA Tank is a premier solution for agricultural, industrial, and residential liquid management. Engineered for durability and spatial efficiency, this mid-capacity vessel is specifically designed for stationary storage or transport on trailers and truck beds. Its low-profile architecture makes it an ideal choice for applications where overhead clearance is limited or where a lower center of gravity is required for safety during liquid transport.

Superior Material Engineering and UV Protection
Manufactured using high-density cross-linked polyethylene (XLPE) or linear polyethylene, these vertical water storage tanks are built to withstand the rigors of outdoor environments. The rotational molding process ensures a seamless, one-piece construction that eliminates stress points and potential leak paths common in welded alternatives.
 
To combat the degradation caused by intense sunlight, USA Tank incorporates advanced UV stabilizers directly into the resin. This prevents the plastic from becoming brittle or "chalking" over time, ensuring the tank maintains its structural integrity for decades. The opaque coloring of many models also serves a biological purpose, as it inhibits the penetration of light to prevent the growth of algae and other waterborne pathogens within the stored liquid.

Structural Design and Functional Features
The horizontal "leg tank" design of the 535 gallon horizontal water tank features molded-in legs that act as integrated baffles, reducing the "slosh" or kinetic energy of the liquid during movement. This is a critical safety feature for mobile applications, such as dust control or field irrigation.

The 535-gallon model typically includes a large-diameter vented manway for easy cleaning and inspection, alongside reinforced gallon indicators molded directly into the tank wall for instant inventory management. Equipped with heavy-duty polypropylene fittings and a siphon tube for bottom-draw applications, the tank allows for near-total drainage. Whether you are storing potable water, liquid feed, or non-flammable chemicals, this tank provides a high-performance, corrosion-resistant containment system.

Contact our team today to learn more about our inventory and find the right tank for you.

Frequently Asked Questions: 535-Gallon Horizontal Water Tank

How does the rotational molding process improve tank durability?
Unlike traditional tanks that may have seams or welds, our 535-gallon tanks are created through a rotational molding process. This involves heating a hollow mold filled with resin and rotating it on two axes. This ensures a consistent wall thickness and a one-piece, seamless construction. By eliminating seams, we remove the most common points of structural failure and leakage, resulting in a vessel that can handle the hydrostatic pressure of over 500 gallons of liquid without stress fractures.

Is this tank safe for drinking water storage?
Yes, when specified as a potable water model, these tanks are manufactured using FDA-approved, food-grade high-density polyethylene (HDPE). The resin is BPA-free and does not leach chemicals into the water. Additionally, the opaque coloring of the tank acts as a light block, which is essential for preventing the photosynthesis required for algae growth, ensuring your water supply remains clean and safe for consumption.

What are the advantages of a horizontal leg tank over a vertical tank?
The primary advantage is the lower center of gravity and integrated structural support. The molded-in legs allow the tank to sit securely on a flat surface or a trailer bed without the need for a separate stand. For mobile applications, these legs function similarly to internal baffles, reducing the kinetic energy of the water as it shifts. This makes the 535-gallon horizontal tank significantly safer for transport on the back of a truck compared to a top-heavy vertical cylinder.

Can this tank be used for liquids other than water?
These tanks are highly versatile and compatible with a wide range of agricultural and industrial liquids, including liquid feeds, fertilizers, and many non-flammable chemicals. However, the specific gravity of the liquid must be considered. While water has a specific gravity of 1.0, heavier liquids may require a heavy-duty wall thickness. We recommend consulting our chemical resistance chart to ensure the polyethylene resin and the gasket materials in the fittings are compatible with your specific substance.

What maintenance is required for these storage tanks?
Because the tanks are treated with advanced UV stabilizers, they require very little maintenance. We recommend a periodic internal rinse through the large-diameter manway to remove any sediment that may have settled at the bottom. The vented lid should be checked to ensure it is clear of debris to allow for proper pressure equalization during filling and drainage. Finally, inspect the bulkhead fittings and gaskets annually to ensure they remain tight and leak-free.