Ever wondered what happens when a water tank gets too full?
All of our rural tanks come with a huge 150mm overflow we like to call a “Megaflow”, which is currently the largest standard overflow on the market. An overflow is a safety device that helps let water flow out of the tank, so when it gets too full it has somewhere to escape, usually out to a drain or ditch. On a liner tank this overfilling can cause issues such as water going behind the liner and being trapped between the liner and the steel body causing rust and corrosion or spilling over the walls and out of the tank potentially flooding your house or garden.
A problem with older tanks is the overflow is usually just a hole cut into the wall and while this might be cheap and easy to do means you lose alot of your tank’s potential storage capacity because when the water reaches the bottom of the hole it will now start pouring out. Pioneer has come up with a solution for this! Our Megaflow has an internal elbow that faces upwards and placed on top of that is a funnel. This means your tank can fill up past that overflow hole increasing how much water your tank can hold over a conventional hole, because we include the funnel it acts like a weir increasing how much water can flow incase there is a huge downpour. Our 150mm overflow has been calculated at being able to handle 900 liters a minute!
We also include a ‘frog flap’ on the outside pipe to help stop bugs and small animals from climbing into your tank from the overflow, keeping your tanks water fresh for longer.
Frequently Asked Questions
1. What is a 150mm overflow on a water tank?
A 150mm overflow is a large-diameter outlet installed near the top of a water tank to safely release excess water during heavy rainfall. It prevents overfilling, protects the tank liner, and reduces the risk of rust, corrosion, and flooding around your property.
2. How much water can a 150mm overflow handle?
A properly engineered 150mm overflow can handle up to 900 litres per minute, making it suitable for large rural tanks and heavy downpours. This high flow rate ensures water can escape quickly without compromising tank integrity.
3. Does a 150mm overflow increase tank capacity?
Yes. Unlike traditional overflow holes, a 150mm overflow with an internal upward-facing elbow and funnel allows the tank to fill slightly above the overflow entry point. This design maximizes usable storage while still protecting against overfilling.
4. Why is a large 150mm overflow important during heavy rain?
During intense rainfall, smaller overflows may struggle to keep up, causing water to back up or spill over tank walls. A 150mm overflow provides greater drainage capacity, reducing the risk of liner damage, water intrusion behind the liner, and property flooding.
If you would like to find out other reasons that make a Pioneer Water Tank so good, please click here. Please request a quote from us today! or call us on 8331 8009.
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