Toro DL2000 User's Guide download pdf (Page 6)

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 ﬂush 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 justiﬁed.

Product Selection

Pressure-compensating dripline is available in two nominal

emitter ﬂow rates, 0.5 GPH and1.0 GPH with emitters spaced at 12” and

18” intervals. Please consult performance charts for actual ﬂows. 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 ﬂow (75% of available ﬂow) and pressure are the

determining factors for the maximum allowable zone ﬂow. This is

determined by the capacity at the point of connection and supply

restrictions beyond the point of connection. Available ﬂow and pressure

can be obtained from the following sources:

• Physical pressure and volume tests (most reliable)

• Your local water district ofce

• 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 ﬁlter used, any necessary treatment

and, in the case of reclaimed or efﬂuent water, which drip emitter prod-

uct to use. Water quality varies signiﬁcantly according to the source

which can be classiﬁed generally as:

• Potable water

• Irrigation district water

• Greywater or industrial recycled water

• Efuent water

• Recycled water

• Well water

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Toro DL2000 User's Guide Page 6