How to Choose the Right Size Poly Water Tank for Your Home
Choosing the right size poly water tank for your home is essential to ensure you have adequate water storage without wasting space or resources. Here’s a straightforward guide to help you make an informed decision.
1. Assess Your Household Water Usage
Start by estimating how much water your household uses. Consider the number of people in your home and your daily activities. For instance:

- Drinking and Cooking: Approximately 5 litres per person daily.
- Bathing and Hygiene: Around 50 litres per person daily.
- Laundry and Cleaning: About 20 litres per person daily.
- Garden and Outdoor Use: Varies depending on garden size and climate.
By adding these up, a family of four might use between 400 to 600 litres daily.
2. Determine Your Rainwater Collection Potential
Calculate how much rainwater you can collect from your roof. Use this simple formula:
- Roof Area (m²) x Annual Rainfall (mm) x 0.9 = Collectable Rainwater (litres)
For example, a 100 m² roof in an area receiving 1,000 mm of annual rainfall can collect:
- 100 x 1,000 x 0.9 = 90,000 litres per year
3. Evaluate Available Space
Space constraints play a significant role in tank selection. If you have limited space, slimline water tanks are an excellent option. They are designed to fit narrow areas without compromising capacity. For instance, Poly Water Tanks offers slimline tanks ranging from 1,002 to 5,336 litres, available in over 20 colour combinations.
4. Match Tank Size to Your Needs
Once you’ve assessed your water usage, collection potential, and available space, choose a tank that aligns with your requirements. For example, a 5,000-litre slimline tank is a popular choice for many households. Poly Water Tanks provides a 5,000-litre eco slimline water tank measuring 825 mm in width, 4,075 mm in length, and 2,180 mm in height, making it suitable for tight spaces like the side of a house or behind a garage.
5. Consider Future Needs
Think about any future changes that might affect your water usage, such as adding more garden space, installing a pool, or increasing household members. It’s often wise to opt for a slightly larger tank to accommodate potential increases in water demand.
6. Quality and Warranty
Ensure the tank you choose is made from high-quality, food-grade polyethylene, which is UV-stabilised to withstand harsh Australian conditions. Poly Water Tanks offers a 15-year ‘no split’ fix or replace warranty, providing peace of mind with your purchase.
Start Saving Water Today with Poly Water Tanks
Investing in a poly water tank is a smart move for sustainable water management. Explore the range of slimline water tanks, including the 5,000-litre options, at Poly Water Tanks to find the perfect fit for your home. With their commitment to quality and customer satisfaction, you can be confident in your choice.
For more information and to view their products, visit Poly Water Tanks.
By carefully considering your household’s water usage, available space, and future needs, you can select the ideal poly water tank to ensure a reliable and efficient water supply for your home.