Browse Forums Landscape & Garden Design Re: Drip irrigation on a slope 11Nov 27, 2009 5:59 pm AS for the downhill slope thing, Netafim Techline is pressure compensated so that each emitter will put out amount of water (1.6 or 3.0 litres). As for lawn sprinklers i use Toro 570, just a personal preferance. Stay away from from cheap Bunnings brands. Re: Drip irrigation on a slope 12Nov 27, 2009 7:24 pm Excellent point. For those reading this, the emitters inside the pipe have a pressure regulating insert made from silicon. very clever design Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ The Toro 570 series are a great nozzle for popups and risers but the MP's are far more efficient in delivering the water to the soil with a minimum of water lost to the air even in windy areas. The older spray nozzles like the Toro 570's lose somewhere around 40% to the air and more in windy situations. I don't use the Toro 570's much anymore. They are pressure regulated as well so they emit a calibrated amount of water per minute regardless of pressure. You won't buy ones like em in that other place mentioned above that's for sure Re: Drip irrigation on a slope 13Nov 27, 2009 9:07 pm "You always must use a brass check valve or back flow valve at the very start of any irrigation system. It needs to be located after the manual shut off and before the master valve or pump valve. These are installed by the plumber when connecting the irrigation off take from the mains near the metre where water pressure is at it's best." Can I clarify here please? 1. I was only going to use a plumber to install a second tap from which I would run the watering system. I was going to do it myself after that, it isn't a large garden. Were you thinking it was big? 2. I understand why a backflow valve is needed if there is herbicide in the line, but why does any other watering system need the backflow valve whereas a hose with trigger nozzle does not? Or do you think all hoses should have a backfrom device? I don't really understand this, I'm sorry. Thanks again. Re: Drip irrigation on a slope 14Nov 28, 2009 11:29 am That's cool mate, it is a valid question. Now days all exterior taps do have a check valve on them. This stops water being drawn back into the domestic system. When you shut off a tap there is a moment when water is drawn back. It is a saftey device really. At sometime in the future who knows what can enter the system. Lets say someone down the road is filling a container full of pesticides. They have no check device on the garden tap. They may switch off the tap and a small amount of pesticide can potentially enter the domestic supply. On another note, lets say your irrigation develops a break you don't know about for a while. This can allow soil and bacteria into your domestic supply. Lets say you apply a pesticide to your garden beds, you have subsurface irrigation fitted and the pesticide has a path way into your domestic water supply without the check valve in place. Make sure the plumber runs his takeoff from the larger 20mm copper pipe and not the smaller 15mm copper pipe which will create headaches at some point in even the simplest systems. Even if your property is small, using a manual tap set up is not advised. The system can become wasteful of water very easily regardless of the irrigation types used if there is no automated regulation of the water. These automated set ups don't have to be complicated at all. You just need a simple power source. You can use small solenoid valves that are similar to that found in washing machines and dishwashers. You can buy cheap pre made manifolds and the whole lot will run very well. try keep your manifold and valves above the ground against a fence for easy of repair and maintance. When choosing a controller, always select one that has a function that adjusts the time each section is on with the push of a button. Often called "seasonal adjust" and is shown as a % symbol. very water wise Yes it is a small system on a small block but if you want it to work well, just automate it Re: Drip irrigation on a slope 15Nov 28, 2009 11:48 am What would be a good idea is to also get your plumber to install a 200mm copper line with a spud rather than a tap. That is just a threaded outlet. That way you have the best flow available. Pressure and flow will be different things and this is why i say not to get a little copper pipe with a normal garden tap. Re: Drip irrigation on a slope 16Nov 29, 2009 9:50 am Quote: Even if your property is small, using a manual tap set up is not advised. The system can become wasteful of water very easily regardless of the irrigation types used if there is no automated regulation of the water. ..... Yes it is a small system on a small block but if you want it to work well, just automate it It was my intention to automate it, but to run it off a second tap. (In my back yard, where I intend later to also install an automatic drip system, I already have the second tap.) So installing the tap is just a convenience. Quote: What would be a good idea is to also get your plumber to install a 200mm copper line with a spud rather than a tap. That is just a threaded outlet. That way you have the best flow available. Pressure and flow will be different things and this is why i say not to get a little copper pipe with a normal garden tap. I don't think pressure is a problem. We are in a high pressure area of Sydney where the Water Board is undertaking a pressure reduction program. I will have to install pressure reduction valves anyway. The front tap is right next to my water meter at the entry to the property. Re: Drip irrigation on a slope 17Nov 29, 2009 5:54 pm The flow will be different to the pressure. ie. how much water will be available to supply the emmiters of your system. The pressure that it is forced in there is different. So try to have a 20mm copper pipe supplying the system rather than a normal 15mm pipe that is used inside and for garden taps. Re: Drip irrigation on a slope 18Dec 07, 2009 9:20 pm I have lots of photos to upload but photo bucket isn't too flash any more This is one I had posted here before somewhere. It shows all the bits making a manifold. I had the filter mounted above ground for ease of access for cleaning. There is now a fence in that spot. http://i308.photobucket.com/albums/kk321/FuManchu5ltr/manifoldandfilter.jpg Hi all I am looking to run a water line under my concrete footpath which is directly next to my home, was seeing if this is possible without cutting the entire section… 0 20780 Hi Brainstrust, I had a go at creating my own irrigation plan, keen to get some feedback. It will be run from one 750-800W pump, off 2* 5000L rain tanks. Each zone… 0 23283 A survey must’ve completed by a certified surveyor. This form part of every DA requirement 3 226353 |