The .5 GPH, model D011 is excellent button online drip emitter with consistent flow at 10 to 20 PSI. The emitter has unique labyrinth design, with turbulent flow pattern that provides some resistance to clogging. The drip emitters are available in .5, 1, and 2 GPH with a 1/4" inlet barb. Use this drip emitter to ensure even, consistent water flow on a flat area. The button online drip emitter will discharge the same amount of flow rated at a constant pressure of around 15 PSI. In other words, the higher the pressure the more flow the drip emitter will release from the drip emitter, and at lower pressure, less flow will be release. We recommend installing a filter and a pressure regulator at the beginning of the line with this drip emitter.
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Water movement in the soil:
When using drip emitters it is important to select the correct flow rate in order to achieve the right wetted pattern shape. In sandy soil, water tends to drain quickly (gravitational force) with little lateral movement, so applying a higher flow rate over a given time period will produce a wider pattern. Using point source irrigation with .5 GPH drip emitters for one hour will provide a smaller wetted area then using 1 GPH for the same time, due to the soil characteristics.
About drip irrigation:
Drip irrigation is the slow application of water directly to the plants' root zone in a predetermined pattern. Drip irrigation can be use to maintain optimum moisture level in the soil at all times that will results in less water lost to the sun and the wind. No water is wasted on non-growth areas, and the root zone is maintained at its ideal moisture level, combining the proper balance of water and air for a very efficient irrigation system.
One of the most important features of a drip irrigation system is the creation of a totally new and more favorable root zone environment within the planting. Drip irrigation sustains this environment by using low flow rates to maintain constant soil moisture levels. This encourages better growth and disease resistance by reducing plant stress.
To water a diverse selection of plant sizes such as trees, shrubs, bulbs and perennials, the option below can be utilized:
· Suggested number of drippers per plant:
o Vines with spacing of 6’- 8’ use 1 GPH per vine or 2, .5 GPH drip emitters spaced on each side of the vine with 8” to 12” between the drip emitters.
o Plants in close spacing: use a 1-GPH dripper every 10" to 12".
o Small plants up to 2 feet high spaced a few feet apart: use one 1-GPH dripper per plant.
o Plants 2' to 3' high: use 2 1-GPH drippers per plant spaced 12" apart.
o Plants 3' to 5' high: use 3 to 4 1-GPH drippers per plant, spaced 12" apart or loop the drip hose around the plant and insert the drippers every 12".
o Plant 5' to 7' high: use 4 to 6 1-GPH drippers per plant, spaced 12" apart or loop the drip hose around the plant with the drippers spaced 12” apart.
How much time to water: Turn the water on for 45 minutes to 1 hour every two to three days, depending on the drip emitter flow rate, your location and the soil type. After a week or two check the soil and the health of the plants, and adjust the irrigation time as needed. If you have an irrigation controller and you need to add more time, adjust the time on the controller or program the controller with additional start-times.
Note: Katif dripper models D043, D044 and D045 require the use of a punch with a 4mm tip.