Design Guide

Routine Inspections Checklist
■ Turn on each zone for five to 10 minutes and walk the area, looking
for excessively wet areas that might indicate leaks.
■ Inspect air/vacuum relief valves (subsurface installations only) and
automatic flush caps for proper operation.
■ Check pressures at the supply manifold and flush ends of each zone,
and compare them with the base information on the System Data
Record. For proper flushing, the flush-end pressure should be at least
10 PSI.
■ Check the operational flow of each zone and compare it with the
design flows or the flows on the System Data Record. High flows
could indicate leaks or malfunctioning automatic flush caps. Flows
lower than expected could indicate clogged drippers, drippers with
excessive salt build-up, kinked dripline or a clogged filter. Low flows
might also indicate that the capacity of the installed remote control
valves, filters or pressure regulators are too low, thus restricting the
flow to the zone.
Component Maintenance Checklists
Remote Control Valves
■ Upon initial inspection, check to see if the valve is properly sized for
the zone flow. Refer to the manufacturer’s specification. Oversized
valves may not close properly and undersized valves will restrict flow
and cause excessive pressure loss.
■ Follow the manufacturer’s recommended procedures for repair and
general maintenance.
■ Inspect for proper operation when opening or closing. A weeping
valve can cause excessively wet areas at low points in the zone.
Landscape Dripline Design _____________________________________________________________
■ Routine Preventative Maintenance
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