Rain Water Tank Size: What Size Of Rainwater Tank Do I Need?

Nudge's Plumbing • March 8, 2023
Rain Water Tank Size: What Size Of Rainwater Tank Do I Need?

Water is a precious resource, and with increasing concerns about climate change and drought, more and more people are turning to rainwater tanks as a way to conserve water and reduce their environmental impact. But when it comes to choosing the right size of rainwater tank, you may need help with how to proceed. In this blog post, we'll explore why rainwater tank size matters, factors to consider when choosing the right tank size and the pros and cons of having a smaller-capacity tank versus a larger-capacity one.

Why Rainwater Tank Size Matters

The size of your rainwater tank will determine how much water you can collect and store, and how much you can use for your household needs. Choosing the right size is important because if you choose a tank that's too small, you may run out of water during dry spells, while a tank that's too large may be unnecessary and cost more than you need to spend.

How To Choose The Right Tank Size

There are several factors to consider when choosing the right rainwater tank size for your needs:


  • Roof size: The size of your roof will determine how much water you can collect. The larger your roof, the more water you can collect.
  • Rainfall: The amount of rainfall in your area will also affect how much water you can collect. If you live in an area with high rainfall, you may not need as large of a tank as someone who lives in a dry area.
  • Water usage: The amount of water your household uses will affect how large of a tank you need. If you have a large household or higher water usage habits, you'll likely need a larger tank.
  • Available space: The amount of space you have available for a rainwater tank will also affect your choice. You may need to choose a smaller tank if you have limited space.

What Size Rainwater Tank Do I Need?

There's no one-size-fits-all answer to this question, as the right size of rainwater tank for your needs will depend on the factors we mentioned above. It’s always best to consult with a professional plumber like Nudge's Plumbing to help you determine the right tank size for your specific needs.

Small Vs Large Capacity Tanks

One advantage of having a smaller-capacity tank is that it's less expensive to purchase and install. It also takes up less space, which can be an important consideration if you have limited outdoor space. However, a smaller-capacity tank may not provide enough water to meet your household needs during dry spells, which can be a disadvantage.

 

A larger-capacity tank can provide several benefits, including more water storage, reduced reliance on mains water, more flexibility in how you use your rainwater and environmental benefits by helping to conserve a precious resource. Of course, there are also disadvantages to installing a larger-capacity tank, including higher purchase and installation costs, and the need for more space to accommodate the larger tank. However, many people find that the benefits outweigh the costs.

July 15, 2025
When it comes to maintaining a home or business, plumbing often stays out of sight and mind—until disaster strikes. Yet behind your walls and under your floors, your plumbing system works hard every day. Small issues can escalate without regular inspections into costly repairs, water damage, or even insurance headaches. Investing in regular plumbing inspections is one of the smartest ways to avoid unexpected expenses and protect the value of your property. Here’s how staying ahead of your plumbing health can save you money in the long run.
rainwater-tanks
By Nudge's Plumbing July 14, 2025
Discover the importance of proper rainwater tank installation for maintaining plumbing health in Dubbo. Contact us now for an expert guidance.
plumbers
May 9, 2025
As plumbers, we hear a lot of non-professional plumbing advice circulating. We're here to set the record straight on 10 plumbing myths you may have heard.
hot water system services
May 5, 2025
Hot water has become a day-to-day necessity. If it's been a while since your water heater has been inspected, it may be time to seek hot water system services.
blocked drain services
May 2, 2025
Have you noticed your sink or shower draining more slowly than normal? Here are some signs that it's time to turn to blocked drain services.
Unclogging a blocked sink
By Nudge's Plumbing May 2, 2025
Blocked sink? Try these 10 expert tips to unclog stubborn drains. Save time, avoid mistakes & know when to call a Dubbo plumber—read more now!
blocked drain service
April 3, 2025
If you run a restaurant, you may find yourself needing a blocked drain service. Keep reading to see the most common plumbing issues we face in restaurants.
plumbers
March 26, 2025
Are you wondering how plumbers can help you improve your home's value? Take a look at this blog to see why regular maintenance is key.
plumber
March 25, 2025
Unsure if you need a plumber for your bathroom? Learn when to call a pro for leaks, blockages, and plumbing issues before they worsen.
A Person is Turning on a Bathroom Sink Faucet — Nudge's Plumbing in Dubbo, NSW
By Nudge's Plumbing November 25, 2024
Avoid costly repairs with regular plumbing maintenance. Discover 5 warning signs to act on now. Stay ahead—read more today!
More Posts