Rainwater Detention Tanks

Tailored detention tank supply and installation for homes and businesses needing dependable stormwater control.

In Wellington and the Kapiti Region, managing water wisely is a big part of keeping our homes, neighbourhoods, and natural spaces safe. With frequent heavy rain and growing communities, having the right systems in place makes a real difference. That’s why Plumbspec has become a trusted name for homeowners and builders looking for reliable detention tanks and expert installation. Our team focuses on practical solutions, clear communication, and making the whole process as straightforward as possible.

A rainwater detention tank or stormwater detention tank works by slowing down how quickly rainwater flows back into the environment. Instead of overwhelming drains and waterways during a downpour, the tank holds the excess water and releases it slowly, reducing the risk of flooding and erosion. Most councils now require detention tanks for new builds in New Zealand, not only for safety but to help protect the wider environment. For our clients, it’s a simple and effective way to manage stormwater while meeting local regulations.

At Plumbspec, we take care of everything from supply through to installation of detention tanks Wellington wide, making sure your system is tailored to your site and built to last. It’s all about giving you confidence that your property is prepared for whatever the weather brings.

Proper installation is vital to the efficiency and longevity of your detention tank.  From excavation and site preparation to connecting your detention tank to the existing stormwater system, Plumbspec’s team works diligently to ensure a seamless and hassle-free experience. 

A recent 16,000L soak pit installation, done by Plumbspec was used on a site where no stormwater drains were available. A 5m x 2.5 hole had to be excavated and lined up with filter cloth, before placing Cirtex disposal pods and reinstating the site.