5
In-Line Valves
In-line valves, installed below ground level, are suitable for sites with all types of ele-
vation changes. Because of their protected location, in-line valves are less likely to be
tampered with by children or vandals, and less likely to incur freeze damage than
above ground models. In-line valves do not afford backflow protection.
In situations where the water is pumped from a lake, well, ditch, or other "dirty" water
source, sand and other debris should be filtered from the line through a filter with a
100 mesh screen. If water supply is also used as a drinking water source, a separate
backflow prevention device is required to prevent potential contamination should fertil-
izers or toxic chemicals in the water be siphoned backwards through the lines.
If your water is supplied by a municipal water system, check with your local Rain Bird
dealer or plumbing supplier for the type of backflow prevention device required in your
area. For specific information about backflow and the types of backflow prevention de-
vices available, please call our toll-free number. 1-800-RAIN-BIRD, and request a
"Backflow Prevention Handbook."
In-line valves are installed below ground, protected by a valve box. An in-line valve is
also suitable for use as a master valve.
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