Irrigation System

Many environmental-conscious countries have already started to limit water usage for a sustainable future. Prince’s has begun an efficient use of water for irrigation. With a strong background on plants and landscape maintenance, we are able to provide professional input and practices for irrigation based on specific situations.

Irrigation can be manual, semi-automatic, or fully automatic. For manual watering, we can provide irrigation advices on the quantity, frequency, and method for specific site and plant conditions. For semi-automatic and automatic irrigation, we design and install different irrigation systems including drip and sprinkler systems.

We also provide advice on fertigation and chemigation. Fertigation is an automatic system to apply liquid fertilizer while chemigation is an automatic system to apply liquid insecticide and fungicide.

We give assurance on our projects for best quality and service. Together with our clients and partners, we can work together for our sustainable and bright future.

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Frequently Asked Questions

Prince’s irrigation engineer will be able to advise the best system given the project specifications – ie plant spacing, and plant type etc.

Drippers allow water to be delivered directly to the plant root zone.

  • Direct application to plants – especially when wider spaced
  • Reduces water wastage
  • Limits overspray onto buildings, walkways etc
  • Minimises risk of mosquito breeding
  • Reduces water loss through evaporation
  • Design flexibility – can take water directly to the plant
  • Avoids fungal infections in susceptible plants

Different emitters are used to ensure watering needs of different plants are met eg 2 to 8 litres per hour drippers. (A “spider” system can also be used in conjunction with a dripper to increase accuracy of water application.)

  • When plants are very small
  • Plants are very close together
  • When there is a shallow root zone

It varies from 1 bar to 1.5 bars depending on the design.

It varies from 2 bars to 3.5 bars depending on the type of sprinklers.


PUB stands for Public Utilities Board. Standard PUB water pressure is 3 to 3.5 bars.


If the pressure is more than the designated pressure , the velocity of the water in the system is high and the components may become loose or fall out during operation/ or the system may develop leaks.

By using a gate valve / pressure regulating valve and a pressure gauge in succession. Increasing or decreasing the pressure on the pressure gauge is done by adjusting the gate valve/ pressure regulating valve.

For larger projects, zoning might be required. This is when the area is divided and watered at different times.

  • Area to be irrigated is large
  • Dripper discharge is high (l/hr)
  • Water availability is low

When discharge and pressure required is higher than available pressure.

Electricity is needed when a pump is used to pump water into the system.


Liquid fertilizer is applied via the irrigation system using a fertigator / fertigation pump/ ventury assembly or a dosatron.

The type of fertilizer applied depends on the plant species. Nitrogen fertilizer is good for vegetative growth, and phosphate and potash are often used for the root growth and flowering. An all-round fertilizer is generally used with added micro nutrients.

  • If the water quantity and pressure is not enough to supply the entire system then a tank is required to store sufficient water for pumping
  • A tank is also used to avoid pumping directly from a PUB outlet

Different system requirements will influence the cost of the system – eg whether a tank is needed, how many zones, type of system etc

Removal of Blockages, cleaning of filters and drippers/ sprinklers, flushing of lateral lines ensuring all plants are getting adequate water

  • Quote
  • Design
  • Installation
  • User manual and schematic
  • Maintenance