Frequently Asked Questions

No. As long as there is access, we can give you a quote without you being there.
A Sustainable Irrigation staff member will visit your property and work out whether your property is best suited for drip irrigation or sprinklers after taking into consideration factors such as plant type, sun/shade, water flow and pressure etc. If we are going to install sprinklers we will work out roughly where each sprinkler will be. We will check for access to run pipes beneath hard surfaces, check the water flow and pressure using our accurate gauge, and check whether to install a powered controller or battery operated controller.
Without these measurements it is not possible to correctly design an irrigation system. The number of sprinklers per zone needs to be established. Each sprinkler uses a certain amount of water (in Litres per minute/LPM). If your water flow in LPM is less than the total amount of litres being used by all the sprinklers, you have to divide the sprinklers into zones which determines how much cable, pipe and the size of the controller. If you exceed the available LPM in a zone, the sprinklers will not operate correctly.
Head to head spacing is when sprinklers are spaced in a grid pattern.Where one head sprays to, you install your next head there, so if a sprinkler has a radius of 12m, each sprinkler should be 12m apart in each direction. Head to head is the optimum spacing for perfect coverage, eliminating dry/wet spots. Usually sprinklers are installed along the edges of a lawn throwing inwards. On large lawns rows of sprinklers may be installed at equal distances in a grid pattern.
Irrigation is best installed before any turf is laid on new landscapes. We use a trencher that is 80mm wide. On existing lawns the grass normally grows over within 4-6 weeks in peak conditions. Some settling may occur and a light topdressing over the trenches may be required once the soil has settled. As an option we can use a turf cutter to remove the turf before trenching, and re-install the turf once any pipes and cables are installed.
After years of trialing different products, we install different brands for certain components of the system. We generally use Weathermatic, Hunter, and Netafim products depending on the application.
Yes we will run you through the functions of the controller and explain how it works. We will be happy to answer any questions. We will place a sticker with our phone number on the controller so you can call us from the controller and ask any questions.
Due to the many unknown factors in repair work, it is difficult to give a quote unless it is something straight forward like replacing a controller.
Install a PVC stormwater pipe at least 50mm in diameter below your concrete to link all hard surfaces such as driveways and paths. Pipes and cables can then be fed through as required.
Yes. Irrigation is a specialty job. By using an unlicensed contractor you may have a sub-standard system installed that does not meet industry standards. A licensed contractor will ensure that correct backflow prevention is installed, the system will be efficient, you will not have dry patches because of a poor design, and you will receive a warranty.
No, Smartlink weather stations and Aircards can only be installed on Weathermatic controllers.