Design Guide

Filters
■ Filters must be inspected and cleaned periodically. The frequency
of inspection is dependent on the water source. Municipal potable
water may require less frequent cleaning than irrigation district
water, pond water or well water. The frequency is determined by
historical experience as new systems are operated.
■ Commercial installations should include pressure gauges, or
facilities to connect pressure gauges, immediately upstream and
downstream of each filter. Filters should be cleaned when the
pressure drop across the filter is 8 PSI or greater, or when the
downstream pressure falls below the designed working pressure
of the system.
■ Filters without pressure gauges should be inspected monthly until
the necessary frequency is determined.
■ Filters should always be inspected when any system break occurs
ahead of the filter.
■ If filters are plugging too frequently, a larger filter (two times the
highest zone flow) may need to be installed upstream of the zone
filters to pre-filter the water supply.
Pressure Regulators
■ Annually check the pressure output just downstream of the
regulators to ensure that the valve is operating at designed
pressures.
Dripline
■ Inspect driplines at the air vent (subsurface installations only)
and/or flush cap locations for salt build-up after the first year of
operation. If necessary, inject commercially available cleansing
solutions through the system at the recommended rates and
continue with annual treatment. Consult with local fertilizer
distributors for recommended materials and rates.
■ Prior to digging in planted areas with subsurface dripline present,
turn on the system long enough to create wet areas on the surface
to locate the driplines.
■ After cultivation or maintenance activities, turn on the system for
five to 10 minutes to inspect for leaks that might have been
caused by these operation
_____________________________________________________________Landscape Dripline Design
■ Routine Preventative Maintenance
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