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RETENTION TANKS 

Retention Tanks: Retention tanks are specifically designed to capture and 'retain' stormwater, providing an essential solution for household water use. By collecting rainwater, retention tanks allow any overflow to be directed either to the local council's stormwater system or to an engineered soakage pit. If you're looking for effective stormwater management or water-saving solutions, retention tanks could be the right choice for your property.

Detention Tanks: Detention tanks, on the other hand, work to slow down the flow of stormwater. Engineered with a unique design, the stormwater enters the tank through an inlet and gradually trickles out through an orifice at the bottom. Detention tanks are ideal for controlling the flow of rainwater, reducing the risks of flooding, and helping in erosion control.

Choose the Right Stormwater Management Solution: Whether you're in need of a retention tank to harvest rainwater or a detention tank to control stormwater flow, our expert team can guide you through the options that best suit your needs. With years of experience in water management, we offer tailored solutions to your stormwater challenges.

To learn more about retention and detention tanks, or to explore other water management solutions, please contact us today.

FLOOD WASH TANKS

Dart Concrete Floodwash Tanks have been designed to maximise flow performance using our 22,500L precast concrete water tank. The tank pictured has an epoxy coated cast iron 300mm peak flow valve with 316 stainless steel shaft set into the tank providing a massive flow of water to clean your yard / feed pad. Alternative sizes are available on request.

Flood washing systems use surges of water to clean the yard. Washing times can be reduced to less than one minute. Use either fresh water, water from the plate cooler or storm-water or pump your effluent pond back up to your floodwash tank.

Floodwash tanks are capable of fitting a wide range of pipe sizes. They are fitted with strategically placed lifting anchors cast into the concrete, to allow for safe off-loading, and efficient and economical installation. We have secured the services of a specialised engineer to work out flow rates and valve performance.

Flush tanks by Dart Concrete are produced in accordance with NZS.3106:1997 They are manufactured in 40MPa concrete for high durability and each unit is water tested prior to delivery.

OIL & GRIT INTERCEPTORS

Interceptor Traps are essentially a Precast Concrete container that acts to capture and retain greasy and or oily fluids inside the unit between its multiple chambers. The grease and oil rise to the top of each chamber while the rest of the liquid passes beneath The interceptor trap may be supplied in a number of different sizes and capacities to match the required application and to conform with Local Authority regulations.

Interceptor Traps are designed as an addition to Cafes, Restaurants or Commercial Kitchens for the protection of wastewater treatment systems.

Interceptor Traps come in many sizes and configurations to suit a range of flow applications and regulatory requirements. They are fitted with strategically placed lifting anchors cast into the concrete, to allow for safe off-loading, and efficient and economical installation. Each unit is manufactured with either PVC or Earthenware fittings cast into the structure.

CESSPITS / CATCHPITS

We make a range of precast concrete Cesspits, designed to align with regional infrastructure specifications for stormwater. These units play an essential role in preventing unwanted debris from blocking drains, contributing to more efficient and less expensive maintenance of drainage systems.

Our standard sizes available are:

  • 300mm x 300mm x 600mm

  • 300mm x 450mm x 740mm

  • 450mm x 450mm x 1020mm

  • 450mm x 675mm x 1200mm

  • 450mm x 675mm x 1800mm

POROUS WELL LINERS

We manufacture 900mm x 800mm and 900x 450mm porous well liners. These are expertly designed to facilitate the dispersal of stormwater into the ground. Our well liners are an essential component for effective stormwater management, especially within the Hamilton City region.

In addition to our high-quality well liners, we provide 100mm thick precast lids, available with or without 100mm PVC pipe access points. These access points enable easy connection of downpipes, ensuring a seamless integration within your stormwater system.

Typically, two of our well liners can serve approximately 40m2 of roof area, making them an efficient solution for handling stormwater.

CONCRETE RISER RINGS

At Dart Concrete, we expertly manufacture a versatile range of precast concrete riser rings, designed to elevate the level of manhole access to suit your specific needs. These rings play a crucial role in adjusting the height of manhole covers, providing flexibility and safety in utility and infrastructure projects.

Our precast concrete riser rings are available in the following sizes, all featuring 600mm diameter access openings:

  • 100mm

  • 150mm

  • 200mm

  • 300mm

  • 600mm

  • 900mm

Explore Dart Concrete's collection of precast concrete riser rings and discover the perfect solution for your manhole access requirements.