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Hunter Pro-C Modular 4 Station Indoor/Outdoor Controller | PC-400

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Hunter PC-400 4 Station Outdoor Modular Sprinkler Timer

  • Hunter Pro-C Modular Indoor/Outdoor Controller
  • 4 Stations
  • Modular Controller

Features & Benefits

The Pro-C has proven to be the most reliable and robust controller in the industry, with the flexibility to expand on demand due to its modular design. When expansion isn't necessary, the fixed 6 and 12 station models offer affordability in a high-end residential controller. Now, the Pro-C will easily accommodate Hunters Solar Sync without additional wiring. The new Solar Sync dial position makes it easy to upgrade and program any Pro-C to smart control. The Hunter Solar Sync is an EPA WaterSense labeled smart device which calculates evapotranspiration (ET) and adjusts Hunter controllers daily based on local weather conditions, resulting in water savings and conservation. The Pro-C and all AC powered Hunter controllers are now EPA WaterSense labeled when paired with the Solar Sync weather sensor.

  • Flexible design: Modular model offers 4-16 stations, or choose fixed 6 or 12 station models
  • Enclosures:indoor and outdoor plastic
  • Independent programs: 3
  • Start times per program: 4
  • Max. station run time: 6 hours
  • Solar Sync dial position: now available with built-in Solar Sync programming for increased installation efficiency
  • Solar Sync delay feature: allows adjustments to be postponed for up to 99 days
  • Cycle and Soak feature built in: reduces runoff
  • Lighting programs built in: allows the ability to add landscape lighting control
  • Added knockouts offer additional flexibility
  • Programmable rain delay: prevents watering for an extended period as needed
  • Non-volatile memory: keeps programs indefinitely without battery backup
  • Rain sensor bypass: allows the controller to ignore sensor devices when needed
  • One touch manual start and advance: allows user to start or test any station
  • Warranty period: 2 years

Product Details

  • Transformer input: 120 VAC or 230 VAC (international model)
  • Transformer output (24 VAC): 1 A
  • Station output (24 VAC): 0.56 A
  • P/MV output (24 VAC): 0.28 A
  • Sensor inputs: 1
  • Operating temperature: 0° F to 140° F
  • CE, UL, cUL, C-tick, FCC

Advanced Features


By adding a Solar Sync™ to your Hunter controller, it transforms into a smart controller using local weather conditions to tailor watering schedules to actual conditions on the site. A Hunter controller with Solar Sync has been independently proven to have a detailed list of water saving features and has been approved by the EPA as a WaterSense Smart Watering Controller. Click here to learn more about Smart Controllers


A manual back-up utility that stores complete controller scheduling and setup information in back-up memory. This allows the saved watering schedule to be restored at any time. This can be used to set a controller back to its initial settings after tampering or at the beginning of a new season.


Automatic short circuit protection is a feature found in all Hunter AC powered controllers. This feature automatically detects electrical faults, which are typically caused by wiring issues. Only affected stations are skipped, allowing all other stations to water normally as programmed. There are no fuses to blow or internal circuit breakers to trip, so complete irrigation system shutdown is avoided.


The QuickCheck feature makes field wiring issues easy to assess with the push of a button. QuickCheck displays an ERR message when a field wiring short is detected on a particular station number.


This feature allows for quick adjustments to irrigation run times through a percentage scale. During peak season, set the seasonal adjustment to 100%. If weather conditions require less water, enter the appropriate percentage value (i.e. 50%) to cut down irrigation run times without the need to adjust each station in the program. This model offers two different ways to use Seasonal Adjustment to reduce water usage: Global and Daily.

Global: The Global option provides a Seasonal Adjustment percentage to all station Run Times on all of the controller's Programs.

Daily: With the addition of a Solar Sync ET Sensor, the controller has the ability to automatically implement daily adjustments based on measured local weather.


Users can program a delay between stations as the controller advances from one station to the next. This delay can range from a few seconds (to permit slow-closing valves additional time to close) to a much longer period of time (to allow pressure tanks time to recharge), based on user requirements.


The ability to specify which program will be shut down in response to a specific sensor alarm. This allows programs unaffected by the sensor to continue automatic operations.


Day(s) of the week can be programmed OFF in advance, so that irrigation does not occur regardless of program interval schedules. For example, if the gardener mows the lawn on Saturday, the Non-Water Days feature allows Saturday to be programmed OFF, so that watering will not occur.

Hunter Pro-C Modular 4 Station Indoor Controller

Installing Station Modules: (Sold Separately)

The Pro-C controller is supplied with a factory-installed base module for up to 4 stations. Additional modules may be added in increments of 3 stations (PCM-300) or a single 9-station (PCM-900) to expand the controller’s station capability to 16 stations. Additional modules are sold separately.

The Pro-C utilizes automatic module recognition firmware to identify when PCM modules are installed or removed from the controller. This feature will recognize the correct number of stations without having to reset or cycle power to the controller

Installing PCM Modules

The Pro-C controller is designed with a simple to use "Power Lock" feature that assures that the modules are energized and firmly secured into the controller. The "Power Lock" can unlock or lock all modules at one time by simply pushing the "Power Lock" slide.

  1. Slide the "Power Lock" into the "Power Off" (unlocked) position. Insert the PCM modules into the appropriate sequential position in the controller cabinet.
  2. Once all of the modules are in place, slide the "Power Lock" into the "Power On" (locked) position to energize and secure the modules into the controller.
  3. The Pro-C will automatically recognize the correct number of stations. It is not necessary to press the reset button or cycle power to the controller.
Hunter Pro-C Modular 4 Station Indoor Controller

Note:The use of a PCM-900 to expand your controller to 16 stations requires that one PCM-300 be installed in the first expansion slot (stations 5–7) and the PCM-900 in the upper two expansion slots.

Product Tag:
Best Value
Product Type:
Controller (AC)
Enclosure Type:
Computer Program:
Max Station Run Time (HRS):
2 years
Light Commercial, Residential
Smart Features:
Mobile App, Remote Control Ready
PC Series
Power Source:
AC Powered
Number of Programs:
Start Times Per Program:
Sensor Compatible:
Rain Sensor Compatible:
Controller (AC)
Residential and Light Commercial
Enclosure Type:
4.6 / 5.0
15 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great Reliable Timer
I used the PC-400 to replace a defective 300. Every component fit and it was an easy swap out. The only problem I experienced was the common wire for the zones was attached to the common terminal on the relay modular. The 400 common, although clearly marked, is not mentioned in the instructions. There should be a note to use this common on a swap-out instead of the one on the module. A little set back, but all working now...
October 25, 2017
over 3 years ago
Very Happy
I have 3 of these timers on my property. They are reliable and expandable when needed. Easy to program. If you want convenience think about purchasing the compatible remote control!
October 26, 2017
over 3 years ago
Bought a PC-400 to replace and older PC-300 unit that was loosing memory periodically and had a transformer that would fail when the heat on that side of the house got to high. The new on fit perfectly and programmed easier than the old one. it took me a couple of days to insure that things would work reliably. But I am very happy with the new unit.
August 25, 2020
Hunter PC400
These have to be the most user friendly controllers on the market.

I use these exclusively. A very dependable unit.
April 11, 2020
8 months ago
Would recommend
Prompt delivery easy to install and works great Thank You
June 13, 2018
over 2 years ago
Would buy it again!
Outstanding units. Especially the newer models. Highly recommend them.
August 16, 2017
over 3 years ago
Good solid product .
I left the weather door ajar and a rainstorm blew it open. That was the end of the electronics but the front panel is available and easy to replace. That saved rewiring the whole unit. The relays survived.
November 4, 2014
Great timer
Had to replace the original timer after 15 years of service. I did so with the very same timer because I liked it so much. The flexibility in the number of zones it handles, the remote control accessory and multiple program options are just a few of the features that I have found very helpful. Having had numerous different timers in several different homes and geographical locations I highly recommend this timer.
Sprinkler Warehouse as a supplier was knowledgeable, cost competitive and fast delivering.
September 2, 2020
2 months ago
Fit my unusual need
I have a U-Pick vineyard and needed a timer that could be programed to alternate between two master valves for a specific length of time all night long (15 min for section 1, turn off, switch to section 2 and turn on for 15 min and then back to sector 1, repeat all night long). This was to help prevent freezing of the vines during early and late season cold snaps. There is a feature called"Cycle and Soak" and is exactly what I needed. Thanks to Sprinkler Warehouse and Hunter for all their help in getting it programed and working.
July 15, 2017
over 3 years ago
July 29, 2015
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 31 questions Browse 31 questions and 81 answers
Why did you choose this?
SprinklerWarehouse.com Store
Customer friendly, easy to program, easy for customers to learn. Never had a call back since 2006 when I put my first one in.
Claude F on Nov 19, 2018
According to the description of the production provided on the website, this item is the best option to replace an older Hunter Professional Series Controller that I currently have on my residential sprinkler system.
Ellen A on Aug 29, 2018
Customer friendly, easy to program, easy for customers to learn. Never had a call back since 2006 when I put my first one in.
Claude F on Nov 19, 2018
One I had was broken
S B on Sep 13, 2018
According to the description of the production provided on the website, this item is the best option to replace an older Hunter Professional Series Controller that I currently have on my residential sprinkler system.
Ellen A on Aug 29, 2018
I need to replace my Hunter sprinkler controller and your site offered a full line of Hunter products. Shopping at your site has been a gratifying experience. Thanks!
R E on Jul 22, 2018
replace old one
T H on Jul 5, 2018
recommended by installer
V P on Jul 3, 2018
I used it in the past. Good name and sturdy
B R on Jul 2, 2018
Looking to replace a PC-300 that quit working and this was the closest replacement.
Ray on Jun 4, 2018
B U on May 25, 2018
My unit, after 12 years of service, died.
S P on May 17, 2018
To replace defective PC-300
M B on Sep 28, 2017
Replacement clock one of the best timers on the market
William D on Aug 4, 2017
Need to replace one...
J O on Aug 2, 2017
J M on Jul 26, 2017
Pro-C Hunter unit installed 5/2006 lasted until recently, so replacing with another Hunter model. Thanks to tech support for answers to questions and recommendation for replacement.
J G on Jul 21, 2017
Replacement for PC-300 -- transformer failure
Robert B on Jun 25, 2017
Very good Price.
BIPINKUMAR P on Jun 24, 2017
Immediate use
Jeffrey O on Apr 27, 2017
My house's sprinkler system was cracked and filling up the manifold pit with water. Someone used an inferior system. I got the info from chat on sprinklerwarehouse 2 years ago and could not have been happier. This timer was matched perfectly to the new manifold I ordered at the same time. Saved me $2500 for new system installation.
John T on Apr 4, 2017
Jeffrey R on Mar 1, 2017
recommended by my landscape company for my residence
K H on Nov 17, 2016
One I had was broken
S B on Sep 13, 2018
I need to replace my Hunter sprinkler controller and your site offered a full line of Hunter products. Shopping at your site has been a gratifying experience. Thanks!
R E on Jul 22, 2018
how does the pc 400 compare, except being indoor and outdoor, to the xc 400i?
Dennis D on Sep 23, 2015
Hunter Pro-C Modular 4 Station Indoor/Outdoor Controller | PC-400
Hunter Pro-C Modular 4 Station Indoor/Outdoor Controller | PC-400
Hunter X-CORE 4 Station Indoor Controller | XC-400i
Hunter X-CORE 4 Station Indoor Controller | XC-400i
BEST ANSWER: It's the same unit same features outdoor just has a protective lock box.
Wanted to know if the pro c 400 is a replacement model for the pro c 300?
Sudhen on Oct 27, 2014
Hunter Pro-C Modular 4 Station Indoor/Outdoor Controller | PC-400
Hunter Pro-C Modular 4 Station Indoor/Outdoor Controller | PC-400
Hunter PC-300 3 Station Modular Outdoor Sprinkler Timer
Hunter PC-300 3 Station Modular Outdoor Sprinkler Timer
BEST ANSWER: Yes. This is the replacement for the PC-300 and also replaces the need to add the Solar Sync Sensor MODULE as this is now incorporated as a rotary dial position on the PC-400. Only the Solar Sync sensor is required to add the automatic features to the PC-400.
Is this unit expandable to 15 stations?
Dr. Vinny G on Dec 24, 2014
BEST ANSWER: Yes. By installing one PCM-900 and one PCM-300 you are able to increase service from 4 up to 16 stations. In your case you would have one zone left unwired and available for future use. The expansion modules are very easy to install by simply moving the expansion lock master slide bar to the POWER OFF position, sliding in the expansion modules and returning the master slide bar to the POWER ON position.
does manual start automatically run all stations?
John M on Apr 11, 2016
BEST ANSWER: Most hunter clocks have a manual start single station and a manual start all stations which will cycle through all stations from the start station to end depending on program selected.
is the 24 volt transformer included in the controller?
Rick E on Nov 18, 2017
BEST ANSWER: Yes. I use these very same controllers on a golf course.
Can this be used with the rainbird DFV-100 valve?
David D on Apr 2, 2017
BEST ANSWER: This is a standard 24AC selenoid valve. The Hunter controller should have no problems providing the rush- and holding currents for this valve
On a PC-400, if I turn the knob from run (at an idle time) to the manual position and then back to the run position------will the controller run all stations as programed?
John M on Apr 12, 2016
BEST ANSWER: I am not fully understanding the question.
If you change from run to manual and then back to run the system will the only run as you had originally programmed it, You do not loose the programming set by changing to manual.ten to run
You can run the system manually for example if you wanted to trouble shoot a problem or water between scheduled cycles.
does this replace the humter SRC ?
A shopper on Jun 20, 2016
BEST ANSWER: I'm not sure if it replaces the scr
It's a 120 volt system with battery back up for the memory only
It works very well for me
It is expandable for more zones if needed
It's very adjustable for seasonal changes
It has solar sync and rain sensors optional
It's easy to install
Easy to run and understand how to operate
Highly recommend this unit
Can the buil- in transformer on the outdoor controller be replaced?
Bob M on Feb 28, 2017
BEST ANSWER: Yes. A replacement transformer is listed on the Sprinkler Warehouse website as a Hunter Pro C Transformer Out Door. This is a 120v, 24 Vac transformer that will fit a Hunter PC-400 4 Station Outdoor Modular Sprinkler Timer.
Is this also a replacement for the pc 300i?
martin M on Apr 12, 2016
BEST ANSWER: I'm not sure. i got the PC-400 because I had a lot of zones and it looked like what I needed and I am very happy with how it is working.
does the hunter pc-400 i ( indoor) have a case enclosure to conceal the electronics?
A shopper on Jul 23, 2015
BEST ANSWER: I bought the outdoor version
I believe the only difference between the two is
The indoor has an external transformer
That needs to be plugged in inside the house and run a low voltage wire to the controller
The outdoor version takes 110 volts directly into the controller
The transformer is built inside the controller
All controls are sealed from the weather inside a weather tight box with a lock and key
Excellent unit 5 stars
How do you tell the indoor from the outdoor controller?
vince s on Jan 31, 2015
BEST ANSWER: The indoor controller comes with a plug-in transformer and pigtail for low voltage wiring. The outdoor controller has a built in transformer to convert the 110v supply wiring. The second photo for either model shown online incorrectly reflects the indoor controller for both. With the wiring access panel open, the outdoor controller has a screw mounted cover over the lower left open compartment and a 5/8" threaded access port to receive the 110v supply conduit. Otherwise, the two look identical in appearance with the exterior cover door off and the wiring access panel closed.
i need 240 volt system, do you have one?
caesar a on Apr 13, 2018
BEST ANSWER: This controller puts out approx 24 volts to each station’s solenoid to activate the valve. So yes it’s 24 volt
Will I need to buy a PCM 300 in addition to a PC 400 controller to operate a 6 station system or is there a simpler more economical way?
A shopper on Oct 14, 2017
Hunter Pro-C Modular 4 Station Indoor/Outdoor Controller | PC-400
Hunter Pro-C Modular 4 Station Indoor/Outdoor Controller | PC-400
Hunter Pro C 3 Station Expansion Module | PCM-300
Hunter Pro C 3 Station Expansion Module | PCM-300
BEST ANSWER: The smaller expansion module is 3 station, and that is the PCM-300.
I need 8 stations what's the total price?
A shopper on May 2, 2017
BEST ANSWER: Good morning, the pricing is available online. We normally do not do quotes. But the controller comes base 4 stations. Controller is $78.98 and the module is $28.38 you would need two of those. If you need further assistance please let us know.
how do i know if i have a pro-c 400 or pro-c 300 ?
A shopper on Jun 20, 2016
BEST ANSWER: Open the control panel face plate and it's marked on the inside of the controller door. The face plate is on hinges, apply slight pressure on plastic lock seat and the door should swing open.
How do you program the days you want to water?
A shopper on Jul 30, 2015
BEST ANSWER: you go to the watering days then you press the plus symbol to turn them either on or off and then you go right or left with your arrows to go to the next watering day
The controller data implies that rain gauging is incorporated. Is this per pro c 400 or per pro c station timing?
Dr. Vinny G on Dec 24, 2014
BEST ANSWER: The Solar Sync sensor or Rain click sensor accessory options have moisture saturation fiber disks that supply the timer with the electronic information of being either wet or dry.
on a Hunter x-core timer how do you start a single station watering ?
A shopper on Dec 10, 2014
BEST ANSWER: I have a pro-c controller but imagine it would be the same on the x-core. For manual watering turn dial to manual and select station and duration, then turn dial to run.

If this does not work, manual watering is usually explained in the user manual.
Does it operate on a 230v 50hz power supply?
Joseph T on Aug 28, 2018
Manual start all stations doesn’t work?
A shopper on May 13, 2018
i have krain hydrotek 2520 can i replece it with a hunter controller?
caesar a on Apr 13, 2018
I have a small backyard and side yard area that have been re-landscaped recently at my condo; with a few hanging flower baskets on the fence. My landscaper said I should get a Hunter two valve controller. Is this model the best choice or is there a better one for my small project?
A shopper on Jul 21, 2016
Can you program this controller to come on two stations once a month? And the other two to water two times weekly?
Randy F on Nov 13, 2015
Will the black modules from the old pro C controllers fit this model?
Robert G on Jul 5, 2015
will this controller work with an indexing valve?
Ralph S on Jul 5, 2015
Will the expansion modules from PC-300i fit the PC-400?
A shopper on Jun 2, 2015
I need a price on a pro C outdoor box set up for 12 zones?
mark b on Mar 16, 2015

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