As you’d expect, there’s no simple answer to ‘how long do septic tanks last?’. The lifespan of a septic tank depends on several factors, including maintenance, usage and composition.
But if looked after, with regular servicing and protection from external damage, they can last for many years.
In these conditions you might expect a tank to last 15-20 years if made from steel, 20-30 years for plastic or fibreglass and up to 40 years for concrete.
For a more accurate estimate, you should talk to the company that installed your septic tank if available, or a professional wastewater company. A septic tank company can give estimates on how long septic tanks will last on installation.
What can shorten the lifespan of a septic tank?
There’s a good chance that your current septic tank was in place before you moved into your property.
Unfortunately, that also means that any mistakes made during installation may impact you through no fault of your own.
Inaccuracies with compliance, system design or installation could lead to issues that are costly to address.
But assuming installation was correct then there are several steps you can take as an occupant to show your septic tank some love and prolong its working life.
Why would I need a septic tank replacement?
There are several reasons why you may need to replace your existing tank, possibly with a more efficient sewage treatment plant, including:
- Compliance with current regulations
- Addressing serious malfunction that cannot be repaired
- Upgrading to a more environmentally friendly system
If you’re unsure if your septic tank needs replacing, a professional inspection is the best way to make sure.
A survey will give you a definitive answer to any issues you may have noticed, from gurgling drains to unpleasant smells or backing up.
CCTV investigation of all areas, followed by a comprehensive breakdown, including recommendations will maximise your system’s lifespan.
Without annual maintenance like this, the signs that you spot could easily become something bigger and more serious.
If you’re in the process of buying a property with a septic tank, then a Home Buyers Drainage Survey is essential to avoid costly problems later on.
Is your septic tank at the end of its life?
If you’ve followed all the best practice advice but still don’t think your septic tank is functioning at its best, it may need replacing.
To arrange a professional site survey, please speak to a member of our helpful team.