Service Manual

Comparison Table
Given the same amount of water, Subsurface Drip Irrigation Covers a 46% larger wetted volume of soil than
a surface drip system. This decreases the saturation point of the soil, which not only leaves room for more air,
but also improves the capillary movement of water and decreases the water lost to deep percolation.
Research performed by the US Department of Agriculture/ARS Fresno
Surface dripSubsurface drip
System Engineering Practices
Subsurface drip irrigation systems use the same basic components as surface drip irrigation systems. This
includes water filtration and treatment, fertilizer and chemical injection, air vents for both air and vacuum
relief, flush valves and manual or automatic control. In addition to the above all ROOTGUARD
®
subsurface
systems need to be equipped with vacuum relief on all drip lines at the high points (elevation) to avert dripper
clogging from ingesting soil particulate during system shut down.
Any organic fertilizers, soil additives and/or water treatments injected through Drip In with Rootguard is not
recommended and will void the warranty."