Locate Valves And Size Pipes; Pipe Sizing Chart - Hunter Sprinkler System Design Handbook

F. Locate Valves • Layout and Size Pipes
Every zone on the plot plan must have its own valve. The valve
controls the on-off flow of water to a sprinkler zone. Indicate one
control valve for each zone and then group the valves together in
an assembly called a valve manifold.
Valves and Pipe
Determine where you want the valve manifold for each area. You
may want a manifold in the front yard and one in the back yard,
or you may want more locations. Manifold placement is entirely
up to you. We recommend placing the manifold in an accessible
spot for easy maintenance. Place the manifold close to the area
the valves will serve, but where you will not be sprayed when
activating the system manually.
Lateral Line
The two most common types of pipe used in sprinkler systems
are polyvinyl chloride (PVC) and polyethylene (Poly). Check with
your local Hunter dealer to find out which type of pipe is used in
your area.
1. Draw a line connecting all of the sprinkler heads in each
separate zone. Follow the example in the illustration on
this page and draw the most direct route with the fewest
turns or changes of direction as possible.
2. Draw a line from the sprinkler line to the zone valve.
This should be the most direct line possible.
3. Begin sizing the pipe. Start at the head farthest from
the zone valve. The pipe connecting the last head to the
second to last head should be 20 mm.
(See Pipe Sizing Chart.)

locate valves and Size Pipes

AREA B
zonE 2
AREA A
zonE 1
6
AREA C
zonE 7
AREA E
AREA A – zonE 1
AREA B – zonE 2
AREA C – zonE 3
AREA C – zonE 4

PiPe SizinG CHArT

Maximum Flow Rates for Sprinkler Lines
PvC Thick
Pipe Sizes Wall
20 mm 34 l/min
25 mm 57 l/min
32 mm 91 l/min
Connecting Sprinklers with PVC or Poly Pipe
OR
RIGHT
AREA D
AREA D – zonE 5
AREA D – zonE 6
AREA E – zonE 7
Point of Connection
PvC Thin Polyethyl-
Wall ene Pipe
38 l/min 30 l/min
60 l/min 50 l/min
99 l/min 83 l/min
OR
WRONG