The Irritec Green Timer EVO Zero-Pressure Battery Timer is the perfect solution for automating low-pressure irrigation setups. Unlike standard diaphragm valves that require at least 10 to 15 PSI to open, this timer utilizes an internal mechanical ball valve that physically rotates to allow water to flow. This makes it the ideal choice for gravity-fed systems, rain barrels, and remote garden beds where water pressure is minimal or non-existent. Because water from rain barrels often contains fine debris, we strongly advise installing a hose thread water filter just above the timer to keep the ball valve operating smoothly.
Programming the Green Timer EVO is incredibly straightforward, entirely eliminating complex digital menus in favor of two easy-to-set mechanical dials. Simply turn the first dial to set your watering duration, and turn the second dial to select your watering frequency. Running on two AAA batteries, it features a helpful low battery indicator, a manual operation setting, and a time delay function up to 12 hours. It connects quickly to any standard garden hose spigot, making it a highly accessible, fail-proof upgrade for your home garden.
Detailed specifications for system planning.
| Specification | Details |
|---|---|
| Connection Type | Standard Female Hose Thread (FHT) Inlet x Male Hose Thread (MHT) Outlet |
| Valve Type | Mechanical Ball Valve |
| Operating Pressure | 0 to 115 PSI (Perfect for gravity-fed systems) |
| Flow Rate | Up to 7.5 Gallons Per Minute (GPM) at 50 PSI |
| Start Times (Frequency) | Every 1, 2, 3, 4, 6, 8, 12 hours — or every 1, 2, 3, 7 days |
| Watering Duration | 1, 3, 5, 10, 15, 20, 30, 45, 60, 90, or 120 minutes |
| Power Source | Two AAA Industrial Alkaline Batteries (Not Included) |
| MPN | B5-EVOGT1 |
| Warranty | 2 Years |
Get your zero-pressure timer running in minutes with these simple steps.
Step 1: Install Batteries
Open the battery compartment on the front of the timer and insert two fresh AAA industrial alkaline batteries. Secure the cover tightly.
Step 2: Attach to Water Source
Thread the 3/4" Female Hose Thread (FHT) inlet onto your rain barrel, gravity tank, or standard outdoor faucet. Hand-tighten to prevent damaging the washer.
Step 3: Set Watering Duration
Turn the top dial to select how long you want the water to run during each cycle (options range from 1 minute up to 120 minutes).
Step 4: Set Watering Frequency
Turn the bottom dial to select how often the watering cycle should occur (options range from every 1 hour up to once a week). Your schedule is now set!
Step 5: Apply Time Delay (Optional)
If you want the timer to delay its first start time, use the delay function button to push the initial watering cycle back by up to 12 hours.
Will this work on a rain barrel with zero pressure?
Yes, this timer features a mechanical ball valve that requires zero pressure to operate. It is perfectly designed for rain barrels and gravity-fed low-pressure irrigation systems.
Unlike standard diaphragm valves that require 10-15 PSI just to push the valve open, the ball valve physically rotates, allowing water to flow completely unhindered.
How do I program this timer?
Programming is incredibly simple using the two built-in dials. Use the first dial to set your watering duration, and use the second dial to select your watering frequency.
There are no complex digital menus, blinking clocks, or smartphone apps required. Just turn the dials to your desired settings and walk away.
What batteries does this timer require?
This timer requires two AAA industrial alkaline batteries, which are not included. We highly recommend using fresh name-brand batteries and avoiding rechargeable ones for the best performance.
A low battery indicator light on the face of the timer will flash when it is time to replace them.
Can I delay the start time?
Yes, this timer includes a built-in time delay function. You can delay the initial start of your watering cycle for up to 12 hours after programming the dials.
This is incredibly useful if you want to set your timer in the middle of the afternoon, but want the actual watering to happen early the next morning.
Verify this timer matches your system needs:
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