Rainwater tanks work hard, collecting and storing precious water year after year — but even the toughest tanks don’t last forever. Over time, natural wear and tear from the elements can cause leaks, cracks, corrosion, and contamination.
So, how do you know when it’s time to repair your tank, and when you should consider a full replacement? Let’s break it down.
Repair vs Replacement: What’s the Difference?
Most rainwater tanks will last for decades with good care and regular maintenance. But no tank is immune to damage.
Common issues include:
- Cracks in plastic or concrete tanks
- Corrosion in steel tanks
- Leaks and worn fittings
- Contamination from debris, silt, animal droppings, or mosquito eggs
Left unchecked, these problems can let harmful bacteria into your water, or waste thousands of litres through leaks.
Can My Rainwater Tank Be Repaired?
In many cases, yes!
Minor repairs, like fixing fittings, gaskets, or manifolds, can sometimes be tackled with a bit of DIY — but cracks and structural issues should always be handled by professionals.
Why?
Quick fixes like superficial welds might seal a crack temporarily but can actually weaken the overall structure. A professional assessment will ensure the repair is safe and long-lasting.
When Is Replacement Necessary?
Sometimes, a tank is simply beyond saving.
If your tank has:
- Major cracks or severe corrosion
- Structural damage affecting its shape or base
- Persistent leaks that return after patching
- Water quality issues that can’t be resolved
…it’s time to think about replacement.
Do I Need Council Approval to Replace a Tank?
If your new tank is larger than 2,000 litres and sits less than 2 metres above the ground (or larger than 500 litres and sits less than 4 metres above the ground), you’ll likely need building consent from your local council.
If you’re unsure, always check with your council — or ask us. We can help you figure out what approvals you need before you get started.
Not Sure What Your Tank Needs?
If you want to keep collecting clean, safe rainwater, knowing when to repair or replace your tank is crucial.
At TankRight, we’re here to help with professional inspections, repairs, and advice. We can give you a clear, honest status report on your tank — so you know exactly where you stand and what steps to take next.