Design Guide

Step 4: Lay out the laterals: (cont.)
■ Using the Spacing Guidelines Table, determine the
nominal emitter flow rate.
Nominal emitter ow rate: __________ GPH (DW9)*
* Actual ow is a function of pressure. Use the Flow
vs. Pressure Table (Table 2.4) to determine actual flow
per emitter: __________ GPH (DW10)
■ Determine the maximum recommended run length from
Table 2.5 below for the selected product and pressure.
Maximum length of run: _________ feet (DW11)
Landscape Dripline Design _____________________________________________________________
■ Typical Design Procedures
NOTES:
EMITTER FLOW (IN GPH) VS. PRESSURE
Tube
Dia.
Nominal
Flow
Actual Flow
15 PSI 20 PSI 25 PSI 30 PSI 35 PSI 40 PSI
DL2000®
and Drip In®
5⁄8” 0.5 GPH 0.53 0.53 0.53 0.53 0.53 0.53
5⁄8” 1.0 GPH 1.02 1.02 1.02 1.02 1.02 1.02
Microline
and Soakerline™
1⁄4” 0.5 GPH 0.50 0.60 0.70 n/a n/a n/a
TABLE 2.4
MAXIMUM RECOMMENDED LENGTH OF RUN @ 0% SLOPE
Tube
Dia.
Nominal
Flow
Initial
Pressure
Spacing Between Emitters
6” 12” 18”
DL2000®
and Drip In®
5⁄8” 0.5 GPH 15 PSI n/a 250’ 350’
5⁄8” 1.0 GPH 15 PSI n/a 160’ 240’
5⁄8” 0.5 GPH 25 PSI n/a 360’ 515’
5⁄8” 1.0 GPH 25 PSI n/a 240’ 340’
5⁄8” 0.5 GPH 35 PSI n/a 400’ 565’
5⁄8” 1.0 GPH 35 PSI n/a 260’ 375’
5⁄8” 0.5 GPH 40 PSI n/a 460’ 650’
5⁄8” 1.0 GPH 40 PSI n/a 300’ 430’
Microline
and Soakerline™
1⁄4” 0.5 GPH 20 PSI 19’ 33’ n/a
TABLE 2.5
12