Manual
Design Parameters
Landscape Dripline Design _____________________________________________________________
■ General Design Parameters
Design Parameters
Toro dripline is designed for use in applications using the
grid concept, with supply and ush manifolds at each end to create a
closed-loop system. The result of the grid design is a completely
subsurface-wetted area that is ideal for plant growth and root
development. Toro dripline can also be installed on both sides of tree
and shrub rows when the grid installation is not justied.
Product Selection
Pressure-compensating dripline is available in two nominal
emitter ow rates, 0.5 GPH and1.0 GPH with emitters spaced at 12” and
18” intervals. Please consult performance charts for actual ows. Product
choice is dependent on site conditions and soil types. The choice of
dripper spacing, dripline lateral spacing and depth is dependent on the
types of soil and plants used.
Water Availability and Quality
The allowable water ow (75% of available ow) and pressure are the
determining factors for the maximum allowable zone ow. This is
determined by the capacity at the point of connection and supply
restrictions beyond the point of connection. Available ow and pressure
can be obtained from the following sources:
• Physical pressure and volume tests (most reliable)
• Your local water district oce
• Engineered calculations based on the size of the point of connection,
meter and static pressure
Always make these determinations during the time of day at which the
water pressure is at its lowest point.
Water quality determines the type of lter used, any necessary treatment
and, in the case of reclaimed or euent water, which drip emitter prod-
uct to use. Water quality varies signicantly according to the source
which can be classied generally as:
• Potable water
• Irrigation district water
• Greywater or industrial recycled water
• Euent water
• Recycled water
• Well water
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