Water Tanks Compared: Poly Tanks versus Galvanised ...

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One of the most popular choices today for storing rainwater is polyethylene (poly) water tanks. Another choice you might come across when selecting a rainwater tank are thick galvanized steel tanks.

Water tanks made today from galvanised steel are often thickly coated with a zinc alloy. This protects the inner steel from rust and corrosion.

In this article we compare key differences between poly water tanks and galvanised steel tanks, including how long it will last, strength, maintenance, installation and price.

Ease of installation

Poly tanks are easier to put in place and install. There are no incompatibility issues with dissimilar metals and materials that can cause corrosion (roof, gutters, treated timbers and fittings).

If you decide to re-locate a poly water tank, then you can easily do so provided you have help to lift the tank. Re-locating galvanised steel tanks are a much more difficult task and care needs to be taken not to tear or damage the inner poly lining.

Firm concrete foundations are ideal for all tanks, however bases can often consist of crusher dust for poly tanks. Galvanised steel tanks require more compact and solid foundations due to their construction.

Longevity

Poly water tanks will often outlast a galvanised steel tank provided they are UV-stabilised to prevent the plastic becoming brittle in the Sun. The main maintenance issues with galvanised steel tanks are rust and corrosion, and they need an inner poly lining which helps to protect against inner corrosion.

The inner poly lining is not included in the steel tank warranty, and a one year warranty for the poly lining is common.

Maintenance

Poly tanks require much less ongoing expense to maintain, and can be setup with a tank self-cleaning system. With galvanised steel tanks, care needs to be taken not to rip the inner poly lining while cleaning, and welded joints and incompatible steel roofs, gutters and fittings can introduce weaknesses. Anodes (positively charged electrodes that carry electrons from a device) normally need to be replaced every 10 years.

Water quality

Corrugated steel tanks require an inner poly lining which helps to protect against inner corrosion and particles tainting the water. This also stops zinc leaching into the water which causes an unpleasant metallic taste. Poly water tanks manufactured from food-grade polyethylene provides the purest quality water and often at much cooler temperatures.

Strength

Galvanised steel tanks are very strong and will not bulge or warp since they are made from steel. Being metal however, they are less impact resistant than a poly tank which will easily withstand being struck with a hammer.

A weak point in the steel tank however, is with the thin inner poly lining which can be easily damaged when installing, tear and need repair or replacing.

Poly tanks can also be made very strong. It is a myth that all poly tanks bulge, warp and stretch. If properly designed and manufactured according to Australian standards for poly tanks then this should never happen. For example, strength is added through:

• one piece construction (poly tank moulded at one piece without side seams)
• if walls greater than 4.5mm and a strong base
• tapered walls (thicker poly walls at the base)
• ribs are added which help provide extra strength.

Requirements for building a strong poly tank are found in the Australian poly tank standard, AS/NZS Polyethylene storage tanks for water and chemicals. Note: Not all Australians poly water tanks comply with this standard. Always confirm your tank is certified by asking the manufacturer who certified them and for their certification number.

Size

Steel tanks can be manufactured to higher capacities than poly tanks. Whereas poly tanks can be made to reliably store water up to around 50,000 litres, a steel tank can be constructed to store up to around 300,000 litres. That said, poly tanks can be coupled together to provide a combined capacity.

Style

Poly tanks provide a greater variety of colours and styles to choose from than many galvanised steel tanks. To obtain a coloured galvanised steel tank is more expensive.

Price

Poly tanks are cheaper to buy than a high-quality galvanised steel tank (with a zinc coating of 450 g/m2). Approximately 35% cheaper, but this depends upon size, type, colour and brand of tank purchased.

Team Poly Water Tanks

Team Poly are experts in manufacturing poly products. Our range includes rainwater tanks, industrial tanks and farming products. If you have found this article helpful, why not contact us today to discuss your needs.

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When it comes to storing water, a 1,000-gallon galvanized water tank is a popular option for many households and businesses. These tanks are durable, long-lasting and able to withstand harsh weather conditions, making them suitable for both indoor and outdoor use. 

However, before purchasing a galvanized water tank, there are several important factors to consider. In this article, we will discuss 10 things you should know when buying a -gallon galvanized water tank to ensure you make an informed decision that meets your specific needs and requirements.

What is a Galvanized Water Tank?

Galvanized water tanks are designed to provide reliable, safe and long-term storage of liquid resources. Constructed from galvanized steel with a zinc coating that helps prevent corrosion, these robust tanks have applications in residential, commercial and industrial settings. 

Available in multiple sizes, galvanized water tanks offer excellent protection against rust and other corrosive damage that makes them ideal for a range of uses including irrigation systems or fire suppression solutions.

Galvanized vs Stainless Steel

Galvanized steel has a zinc coating that protects regular steel from rust corrosion, while stainless steel is composed of iron with 10% or greater chromium content and other elements. Both are excellent water storage containers, but a galvanized water tank will be much easier on the budget.

Consider the Benefits of a 1,000 Gallon Galvanized Water Tank

• Large storage capacity: 1,000 gallons is a significant amount of water, which makes it ideal for use in a variety of settings, such as on a farm or in a residential or commercial building.
• Durable construction: Galvanized steel is a strong and durable material that can withstand harsh weather conditions and resist corrosion, for a long-lasting option for water storage.
• Easy to install: A 1,000-gallon water tank can be easily installed on a flat surface, a convenient option for both new construction and retrofits.

Low maintenance: Galvanized steel water tanks require minimal maintenance, which can help to keep costs down over time. Additionally, they are resistant to rust, corrosion and other forms of wear, which makes them a dependable choice for long-term use.

9 Things to Know About 1,000 Gallon Galvanized Water Tanks

Galvanized water tanks have many uses, and with the important role of storing water, these water tanks become essential tools for various reasons. Let&#;s take a closer look at 9 ways galvanized water tanks can be utilized.

1. Alternative Water Supply

This type of tank is ideal for those living in areas with expensive water bills or off-grid and rural locations. In the case of off-grid use, a 1,000-gallon tank can be used to store water that has been treated through filtration, UV sterilization or other methods, making it safe for drinking.

2. Irrigation

A 1,000-gallon tank is a perfect answer for watering large-scale lawns, gardens and landscapes. This tank size also works nicely for farmers and ranchers who are looking to irrigate smaller parcels of land.

3. Fire Protection

Living in rural areas that are vulnerable to wildfires necessitates taking extra safety measures. A 1,000-gallon water tank can act as an essential source of relief during these difficult times, guaranteeing you access to a plentiful supply of water when disaster strikes.

4. Commercial and Industrial Use

In agriculture, construction and manufacturing, a 1,000-gallon tank can be a versatile and useful tool for storing water. These industries often require large amounts of water for various processes such as cooling, cleaning or other processes.

5. Standard Residential Use

For your family to have a reliable source of water, a 1,000-gallon galvanized tank can be the ideal answer. This is enough for up to three days of supply should there ever be an interruption in municipal water service. Furthermore, this backup resource will cover needs such as hot and cold running water as well as cooking &#; all essential components for daily life as every American household uses approximately 300 gallons of each day!

6. Livestock and Agriculture

To sustain a 1,200-pound cow for one day, 27 gallons of water are necessary. As for horses, they will drink anywhere between 5-10 gallons within the same period. A 1,000-gallon storage tank is sufficient to both guarantee that your livestock&#;s hydration needs are met and serve as an emergency reserve should it be needed.

7. Emergency Water Supply

During a power outage or natural disaster, a 1,000-gallon water tank can be an invaluable resource. It&#;s comforting to know that you have access to safe drinking and cooking water&#; not only for basic needs but also for fire protection during floods and hurricanes. Having your own emergency supply of potable water provides peace of mind as well as security against the unexpected.

8. Rainwater Harvesting

When looking for a long-lasting rainwater storage and collection solution, the 1,000-gallon water tank is ideal. Its galvanized steel construction prevents rusting or corrosion and also provides durability that can withstand years of use. 

By connecting it to your gutter system, you can easily collect rainwater from the roof directly into the tank. By attaching a pump and filter, you can provide access to the stored water when needed.

9. Hot Tub Supply

The large capacity of the tank allows it to store enough water to fill and maintain a four-person hot tub. Using a separate tank is a cost-effective and efficient way to provide water for a hot tub, as it eliminates the need for a continuous connection to a water source from the municipal supply.

Shop Tank Depot for 1,000 Gallon Galvanized, Stainless Steel and Plastic Water Tanks

Tank Depot is your premier supplier for all galvanized, stainless steel, and plastic water tanks. Our galvanized water tanks range from 200 gallons to 3,200 gallons and custom sizes are available. Our product line includes septic, storage, transport, and marine tanks. 
Contact us today to find out more or to locate a retail store near you!