Unpowered Measured Irrigation Controller
Universal Measured Irrigation Controller
Unpowered Valve Box
Unpowered 15mm Valve Box
Unpowered 15mm Valve Box
Key Features
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Unpowered (no batteries, no solar panels, no electronics, no computers, and no WiFi)
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Use for gravity feed (15mm option) or pressurised irrigation
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Use for PC (pressure compensating) dripper or NPC (non pressure compensating) drippers
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Use for subsurface or above surface drip irrigation
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Use for drip tube or drip tape
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The water usage rate is controlled by the demand from the plants
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The discharge from each dripper during an irrigation event is the same as the average on-demand discharge from one subsurface clay pot since the previous irrigation event
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Adjust the interval between irrigation events by adjusting the float or changing the number of subsurface clay pots
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The water usage rate increases significantly during a heat wave
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With a continuous water supply, you can leave your irrigation application unattended for months on end
How to use the Unpowered Valve Box
The Unpowered 15mm Valve Box allows you automatically irrigate your garden using gravity feed from an elevated rainwater tank without using a pump and without power.
If you use one subsurface clay pot, the discharge from each dripper can be set to any value between 569 ml and 1223 ml for the Unpowered 15mm Valve Box, or between 870 ml and 2050 ml for the Unpowered 25 mm Valve Box.
If you use two subsurface clay pots, you should use two drippers in the Unpowered Valve Box and the discharge from each dripper can be set to any value between 285 ml and 612 ml for the Unpowered 15mm Valve Box, or between 435 ml and 1025 ml for the Unpowered 25 mm Valve Box.
Similarly, if you use three subsurface clay pots, you should use three drippers in the Unpowered Valve Box and the discharge from each dripper can be set to any value between 160 ml and 408 ml for the Unpowered 15mm Valve Box, or between 290 ml and 683 ml for the Unpowered 25mm Valve Box.
The discharge from each dripper during an irrigation event is the same as the average on-demand discharge from one subsurface clay pot since the previous irrigation event.
Subsurface clay poy
The following products for clay pot irrigation can be purchased from the