Dairy Effluent Storage
"You're not just buying a Flexi Tank you're buying the flexibility to keep farming through the wettest days "
Fully enclosed Flexi Tanks for dairy effluent & waste water store from 100,000 litres to 2.55 million litres.
Fast to install, no fencing required, and designed with more mixing ports than any other bladder tank, so you keep usable capacity and stay compliant.
10 Year
Full 10 year manufacturer's warranty
800+
Over 800 Flexi Tanks nationwide
KIWA
Independently certified by KIWA for storing Dairy Effluent
Why Flexi Tanks for Dairy Effluent?
When irrigation is restricted by wet weather or council rules, you need reliable storage that doesn’t fill with rainwater and doesn’t lose capacity to solids.
Flexi Tanks give you a fully enclosed, self-supporting system you can connect to your existing sump or pond. They are quick to deploy, OSH compliant (no mandatory fencing), and built for New Zealand’s high UV and perfect for high rainfall areas.
Key Benefits
Fully enclosed — no rainwater dilution, smaller storage volume needed in high rainfall areas
Better access for mixing — more mixing valves and dedicated top mixing valves than any other bladder on the market
Cost effective — lower site costs + 25% depreciation
Fast installation — typically 2–4 hours with minimal earthworksNo fencing required — OSH compliant, people and animals can’t fall in
KIWA certified — ENVIRO+ fabric for dairy effluent
Proven — 800+ tanks installed across New Zealand since 2012
Mixing your Flexi Tank
Flexi Tanks are the most compatible storage bladders for dairy effluent, with our dedicated side mixing valves and new top mixing ports, there is no area in your tank unreachable!
Need to connect a slurry tanker?
Flexi Tanks can be ordered with specific connections in mind, we can offer under tank connections from 150mm - 450mm diameter providing huge volumes to meet your system requirements
Featured photo is a 150mm under connection with a slurry tanker hook up point for fast fill and turn around for the farmer.
Got a Question?
Q: Do solids build up and reduce the usable volume over time?
A: Solids management is critical for effluent storage. Flexi Tanks are the only flexible tanks that feature both side mixing valves and dedicated top mixing ports. This allows thorough agitation from multiple points using a standard effluent pump, keeping the contents as a consistent slurry and minimizing sludge buildup. Combined with proper sand/stone traps on the inlet, this maintains usable capacity far better than basic sealed bladders. Regular mixing is straightforward and recommended.
The only flexible storage you need!
"The advice and guidance received from the Flexi Tanks NZ team is a testament to their knowledge and experience which they were only too willing to share with us."
Anthony Giesbers