Editorial Product Review:Amazon.com Item Description:Incredibly easy to use, this electronic water timer from Gilmour offers four on/off watering cycles per day so your yard looks its best, even during hot summer months. The electronic keypad is a snap to set thanks to the easy-to-read digital display that indicates program steps and selections. The one-week clock repeats the cycle every seven days, or you can choose the skip function for watering every second or third day. There's also a convenient countdown timer running through the duration of each water cycle and the option of manual or timed on/off, so you always control the watering amount and duration.
To help make programming even easier, the electronics are removable (just squeeze the side grips and pull), and the swivel nut allows for a quick connection to the faucet. Change your mind about the program you chose? Select the program override function to temporarily suspend watering. For added convenience, this Gilmour timer runs on four AA batteries (not included) and includes a low battery indicator when power is running low.
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Buyer Reviews
Average Buyer Rating:

Customer Rating: 
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Unique and useful but tiresome
I have eight of these timers so I know them well. Very easy to program with as many as four different programs that can be very specific with a wide range of capabilities. You can turn on manually and set a precise countdown timer for any period of time. Using the unit this way can be frustrating. Because the settings are made with a pressure sensitive panel it does not respond well since you have a specific time to set the countdown. If the setting period times out you have to wait for the timer to cycle through closing and then reopening to set a manual countdown again. The other downside to this timer is that if the unit is in direct sunlight and heats up, the LCD screen will fade and be difficult to read. This condition is not permanent, just while the timer is hot. When that happens the pop off feature is useful to set out of the sunlight. Other than these two shortcomings, I know of no other timer with as many features or that works so well.
Customer Rating: 
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Good Realiable Water Timer
Bought the Gilmour 9400 in June '07 for the dry Redmond WA summers (yes,it's dry here a few days a year). So far I like it and it does the job nicely. I scheduled to run every 3rd day (2x per day) and have had no problems at all at the time of this writing in July '08. Battery life is good and I replace the batteries at the beginning of each season (I see what my trusty battery tester says about what's left on the battery lifespan). I like the multiple scheduler time options (# of hrs+mins on demand, or scheduled every 2nd/3rd day, scheduled any day of week (i.e. m,t,w,th,fr,sat,sun). Only thing I'd ask Gilmour to try to improve is the clarity/brightness of the screen prompts. On a bright day it's bit tougher to read the prompts but I simply cup my hands over it and it darkens it enough to see the prompts a bit better. Read the owners instruction guide and operation should be easy enough for you. I would still buy it again after a year of use. Paid $40 for it (plus tax) with a free shipping coupon.
Customer Rating: 
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Agree with weekend woodworker
This is the second Gilmor model I have used, both relatively short lived. This particular unit is in it's second year. And having a problem similar to WW's - the timing unit seems to be working ok, but apparently does not have sufficient power to turn the ball valve, which seems to require an inordinate amount of pressure to turn by hand. It is also not possible to dissamble the valve-it seems to be mechanically pressed into it's housing. Despite this I plan to investigate replacing the valve part of the unit, as there seems to be no other simple alternative to timed watering.
Customer Rating: 
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gilmore watering timer
Gilmour Group 9404DIB Do it Best Water Timer
Excellent product which works perfectly. Use it you don't need to spend thousands on an outdoor sprinkler system