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1. CAM - Used to index the valve to the next zone and controls how many outlets
are to be used. May be changed to increase or decrease number of operating zones.
Secured to valve top with two cam retaining screws.
2. VALVE TOP - A high strength ABS plastic top secured with seven valve top
3. VALVE BODY - A high strength ABS plastic housing.
4. INLET - Allows for slip and glue connection of a 1 1/4' pipe
5. OUTLETS - 4 outlet model - 1 1/4 PVC pipe / 6 outlet model 1' PVC pipe
CAM REPLACEMENT INSTRUCTIONS
Replacement cams are available to increase or decrease the number of operating
outlets on the HYDROTEK® 4000 Series Valve
BE SURE YOU HAVE THE CORRECT REPLACEMENT CAM. Except for the two zone
cam, cams for the four outlet valves and the six outlet valves are NOT
interchangeable. The correct bottom to be used is marked on the top of the cam.
To remove cam, remove two cam retaining screws and pry up gently with
To install a new cam, partially insert the cam into the valve top and rotate it
counterclockwise while applying gentle downward pressure. This allows the upper
lug on the stem in the valve to slip into the cam. The cam should slip into place
easily. When installed correctly, the cam should slide down in place with NO
tendency to spring back. Improper installation will cause the valve to jam and
prevent the valve from advancing properly.
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Cams for operation of fewer than the full number of outlets have one or more
camming slots blocked. Because of this, its is important to make sure that the cam
is lowered in the valve so that the lug on the stem in the valve is inserted into an
open cam slot in the cam.
VALVE INSTALLATION INSTRUCTIONS
Prior to installation of HYDROTEK 4000® Series Valve, make sure that the system is
designed using adequate pipe sizes and control valves to ensure maximum
performance of the valve.
For installation with large terrain elevations, or applications with high lift
requirements such as overhead systems in greenhouses, the valve should be
installed at the highest point in the system, or check-valves should be installed near
the valve in the elevated lines to prevent the back flow of water from the higher
locations to the lower zones.
Pump Fed Applications: The HYDROTEK 4000® Series Valve can be installed
directly off the discharge side of the pump. The valve is cycled as the pump is
turned off and on. It is important to install the valve as close to the pump as
City Water Applications: For city water supplied applications, an inline solenoid
valve must be installed between the city water source and the HYDROTEK 4000®
Series Valve. Ensure that proper back flow prevention is used in compliance with
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The HYDROTEK 4000® Series Valve may be installed below ground in a valve box
or directly buried.
When connecting the lines to the valve outlets, ensure that the correct cam is
installed. Install lines to outlets corresponding to the numbers on the cam. See
diagram for proper zone hookup of outlets.
Do NOT turn the valve upside down when gluing the inlet and outlet lines into the
valve as glue may run down into the valve and interfere with proper operation.
Allow glue to dry for at least two hours before operating or testing the valve. For
best results, use a multi-purpose glue.
To seal off any unused outlets, install a piece of PVC pipe at least six inches in
length to the outlet and cap the pipe. This will allow additional zones to be used.
In regions of the country where winter temperatures may cause damage to exterior
pipes, the HYDROTEK 4000® Series Valve should be winterized. To protect the
control valve and other irrigation components from damage, the entire system
should be drained or cleared using compressed air. Contact your K-Rain dealer for
more information on the winterization requirements in your area.
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