There are two reasons why a sprinkler will leak water when the system is supposed to be off. The most common reason is called “Low Head Drainage”. "Low Head Drainage" occurs when the lowest head on a zone allows water to drain from the lateral piping, out …

Valve Bonnet Flow Control handle Bleed Screw Solenoid Diaphragm Supprt Ring Diaphragm Diaphragm Spring Most irrigation valves are designed to close within 10 to 20 seconds of the solenoid deactivating. The most common reason why a valve would close slower …

The sprinkler icon flashes when the controller is outputting power to the station terminal or terminals activating a station (see fig.1).  If the icon is blinking with an umbrella on the display (see fig.2),  the rain sensor’s circuit has been broken and …

  Hunter controller's contain multiple sized transformers, therefore each controller has different activation capabilities. Here is a list of recommended applications when using multiple Hunter solenoids. Note: The max stations you see below for each …

These tables are designed for quick reference and are set up to provide maximum wire runs, given the information at the bottom of the table. Maximum one-way distance in feet between controller and valve heavy-duty solenoid: 24 VAC, 350 mA inrush current, …

It's a combination drain hole and flush hole . It's a drain hole because we need to drain the water from below the nozzle turret so it doesn't push up on the nozzle turret in freezing climates. It’s a flush hole because when the head retracts, water and …

The NO AC  display is a diagnostic message telling you that the controller has stopped receiving AC power. The controller is running on the power supplied by the backup battery. Check the power source by plugging a lamp or radio into the wall outlet to …

There are two lights on the  Wireless Rain Clik Receiver , and each has its own purpose. BYPASS - The top light if solid is to indicate that the sensor has been bypassed at the Receiver level. This option is for use when a Hunter controller is not used …

The most common reason for a valve to remain on, or weep, is debris. New installations without proper flushing, recent mainline repair, or well water can cause debris to flow into the valve and get caught between the diaphragm and the seat.  …    It's …

A common reason for a controller to repeat a cycle is too many programmed start times. Only one start time per active program is required, a second start time will cycle the program an additional time. NOTE: In the Start Times dial position, the numbers …

There are three possible reasons why the Mini-Clik would not turn off your sprinklers. The most common reason for non-activation on a Hunter rain sensor is the sensor itself has not encountered enough rainfall. Go out to the rain sensor and manually …

  The  "NO AC" or "Blank"  display is a diagnostic message telling you that the controller has stopped receiving AC power. For the "NO AC" message, the controller is most likely running on the power supplied by the backup battery. Check the power source …

MP Rotator nozzles have a lower precipitation rate than typical spray nozzles, so your run times may need to be lengthened compared to traditional sprays. Run times with the MP Rotator Nozzle should be two to three times longer than a standard spray zone …

A battery-operated controller sends a quick DC pulse to operate the solenoid, therefore the battery-operated controller requires a DC latching solenoid to operate correctly. Also, the DC latching solenoid will have one black wire for the common wire and …

Rotary sprinklers require a certain amount of pressure and flow to operate properly. If the rotor does not receive the pressure it needs to pop up a leaky head will result. Here are some things to look for when a rotor doesn't pop up properly: Problem:   …

The stainless steel option on Hunter rotors offers mutliple benefits, here are a few: Vandal Resistance - Parks and other common ground areas that have heavy foot traffic can sometimes create vandal issues with sprinklers, the stainless steel option adds …

With MP Rotator Nozzles, 80% of the filter can be plugged without a performance drop. MP Rotator Filters can be removed for cleaning and/or replacement. Please view the chart below for more details on each of the filter sizes. MP Model Filter P/N …

Hunter's MP Rotator is the innovative streaming nozzle that has quickly become the irrigation industries favorite. Multi-trajectory water streams qualify the MP Rotator as a streaming nozzle. Here are a few of the MP's features: Multi-trajectory rotating …

If the Solar Sync Seasonal Adjustment is too high or too low you may need to change the Water Adjustment feature on your controller or Solar Sync Module on older models. This will allow you to fine-tune your station Run Times to allow for more watering or …

  You can manually test proper operation of the rain sensor by using the One Touch Manual Start. During the Manual All stations cycle, press the test button on the “Clik-type” sensor (eg. Mini-Clik®) to interrupt watering. Note: The rain sensor will only …

There are a number of reasons why the sprinklers may not come on from the automatic program.  Assuming the controller will run the zones from the controller manually, you most likely have a programming issue.  Below are a few possible causes to the …

  Lock and Key sets for Hunter controllers can be purchased at a Hunter Authorized Distributor in your area. PN387300 (spare part) Standard key set PN387301 (spare part) Non-Standard key set PN387302 (spare part) Non-Standard key set Find a Hunter …

If your controller shows irrigation running (Flashing Sprinkler Icon), and your sprinklers are not working, you may have a wiring problem at the valves or the irrigation water supply has been shut down. If you have a master valve on your system (check for …

Step 1. Check the controller programming Is there a watering Start Time programmed into the controller? Is the Watering Start Time programmed with correct time of day (i.e. AM or PM)? Is the Current Time set correctly (i.e. AM or PM)? Is today a Water …