PCDI Irrigation

PCDI Irrigation

LAS Systems

In New Zealand PCDI (Pressure Compensating Drip Irrigation) is one of the most common methods of applying treated wastewater to land.

It’s why at WaterFlow we don’t just focus solely on the treatment system like others do. We consider your vision for your property first and then find the LAS that will achieve this and finally the wastewater treatment system that will match and meet your needs.

Your LAS or ‘Disposal Field’ has the largest ‘footprint’ of all of the components and is the ‘subject’ of most Council regulations, involving ‘setback’ distances from features like buildings, waterways, flowpaths, stormwater drains, ponds/dams, bores, ground water/water tables, flood zones, boundaries etc… There is also requirements around steepness of slopes to consider which can have a bearing on which LAS you can get consented, on your site, such as irrigation type fields verses soakage type fields.

The Waterflow Team is well versed in all those constraints and options and very passionate about helping you design the ultimate LAS for your property.

PCDI Irrigation Pressure Compensating Drip Irrigation (PCDI) is a flexible irrigation system that requires higher levels of wastewater treatment.

It is commonly required on heavy clay soils where soakage is limited, and it is important that the treated water is spread evenly.

  • PCDI has small emitters allowing a limited flow, this forces the liquid to distribute across the entire field rather than pooling in one area.
  • Due to the fine emitters, the treatment plant must treat to secondary level and the lines regularly cleaned.
  • The PCDI lines can be of varying lengths and run across contour to a certain degree, giving much more flexibility to the layout and shape of the irrigation area.
  • At the end of the lines are flush taps, that allow the flushing out of any contaminants that might build up over time, it is best done with clean water. At the end of the main feed line is the end flush tap. It is similar to other flush taps, but some systems will have a hose fitting for back flushing properties.
  • If your irrigation is buried, the flush taps will be found under purple flush boxes. These have a purple lid and sit flat to the ground to allow the area to be mowed.

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Projects

We’re in 6,000+ backyards around Aotearoa New Zealand

At WaterFlow we work across the country recommending and installing smarter wastewater and sewage systems, for a cleaner New Zealand.

Whether it’s upgrading a water tank or installing a new water system, we always offer bespoke solutions designed to fit your environment and lifestyle. Take a look at our recent projects to be inspired.

Potaka School: Future-proof infrastructure

Full wastewater solution delivered in less that six months

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Waipapa Warehouse gets a flexible wastewater system

From overflowing to future-proof with Econotreat
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Muri Lagoon, Rarotonga

Together with Government initiatives to improve the sanitary situation at Muri to date almost 100 Biolytix tanks are in operation on Rarotonga all helping to minimise the threat of lagoon contamination.

South Pacific Paradise
20 September 2024
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Family Home

The EconoTreat was perfect for this family home. With higher volumes of waste and council requirements of secondary treatment, they needed a system that would provide a consistently high treatment.

Residential
14 December 2023
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Soneva Jani & Soneva Fushi

The award-winning resort truly defines the essence of barefoot luxury. 33 Biolytix systems help to keep it clean and healthy.

Luxury Resort
20 September 2024
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Packhouse Accomodation

With large seasonal fluctuations, this kiwifruit packing facility needed capacity for peak season staff. A custom designed system by WaterFlow met the requirements for the project, with the capacity to process up to 54,000L per day.

Commercial
14 December 2023
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Vunabaka, Fiji

Green technologies and designs are utilised throughout the resort including the selection of Biolytix for wastewater treatment.

Residential and Hotel Development
28 August 2024
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Rural Oasis

The Naturalflow NF8000 System was used in this piece of paradise. The landscaping gives it a tropical feel, as you step through to the pool for some quality time out.

Residential
14 December 2023
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Bahá’í – Henderson

With major upgrades to the building and facilities, the Spiritual Assembly of the Bahai’s was in need of an upgraded wastewater system.

Marae & Light Commercial
01 December 2023
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Otamatea Marae

Struggling to have enough water to sustain the events, we were asked to upgrade the water tanks and drainage. With an additional four 25000L tanks, they aren’t likely to run out any time soon!

Marae & Light Commercial
14 December 2023
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Servicing

Protecting the Future of Your Property and our Shared Backyard
At WaterFlow we are with you from start to finish – and beyond. Once installation has finished, we are still on hand to provide, maintenance, support and servicing.

Discover ways to maintain your systems in between servicing and how to contact our expert service technicians.

Trade

All you need from first inspection to post-install support

For trade professionals, working with WaterFlow means gaining a reliable lifelong partner committed to achieving project success, and a team that values collaboration, precision, and timely execution.

It all starts with your site

Get a free site assessment

Your land and disposal field call the shots, and we’re here to find the perfect wastewater match for your patch.

Not sure what fits your backyard? Let us take a look.

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