Storage

So, you’ve decided to install a municipal backup system or a rainwater harvesting tank — great move. But how big should the tank be? 500 litres? 2,500 litres? 10,000 litres?

The right tank size isn’t just about how much space you have — it’s about how much water you need, how often water is available, and how you plan to use it. Here are 5 key things to consider before choosing your tank:

1. 🧍‍♂️ How Many People Are Using the Water?

As a rule of thumb, a single person uses between 100–150 litres of water per day. That includes flushing, washing, and basic use. For a family of four, that’s about 400–600 litres daily.

If you want to last a 3-day outage without running dry, a 1,500–2,000 litre tank is often the sweet spot.

2. 🏠 What Will the Water Be Used For?

Are you just looking to keep toilets flushing during an outage? Or do you want to run showers, laundry, and dishwashers too?

• Toilets & basic use only? Smaller tanks (500–1,000L) may work.
• Full-house backup? You’re better off with 2,500L and up.

3. 🌧️ Are You Storing Municipal Water or Rainwater?

• Municipal backup tanks need to store just enough to get you through a few days.
• Rainwater harvesting tanks benefit from being as large as your space and budget allow — especially during rainy months.

We’ll help calculate your catchment potential based on your roof size and rainfall.

4. 📦 How Much Space Do You Have?

Larger tanks take up more space, so we’ll consider where you want the tank placed:

• Ground level?
• Next to the house?
• Hidden behind a wall?

Slimline and vertical options are available for tighter spaces.

5. 💰 What’s Your Budget?

Bigger tanks cost more — but they also give you more independence. We can help balance budget with practicality, and even install multiple smaller tanks connected together if needed.

✅ Our Advice?

Don’t guess. Let AquaVula help assess your needs with a free on-site quote.

We’ll take into account your household size, water usage, space, and goals — then recommend the perfect tank size and setup for you.

📞 079 552 1577
📧 Sales@AquaVula.co.za