Garmerain GWT101S, single-zone irrigation controller

A reliable, easy-to-set water timer for one watering zone — automates watering in a garden, greenhouse, or balcony, so plants receive water regularly without manual intervention.

• Type: 1-zone digital water timer.
• Operating pressure: 0.5 – 8 bar (≈ 7 – 116 PSI).
• Maximum flow rate: up to 35 L/min.
• Watering duration: from 1 to 240 minutes (up to 4 hours).
• Watering frequency: from every 1–12 hours or at intervals of 1–7 days — selected according to the plants’ needs.
• Power supply: 2 × AA (1.5 V) batteries.
• Operating temperature range: 3 °C – 50 °C.
• Valve / Connections: standard faucet/hose threads.
• Low-battery indicator and frost protection — at temperatures below ~3 °C, remove the device to avoid damage.
• Operating modes: automatic (on a schedule), manual watering (without changing the main schedule), and “Rain-Delay” (delaying watering due to rain/humidity).

Recommendations for use

• Install the timer on a standard garden faucet or hose, before the pipe/hose leading to the plants.
• Set a schedule: choose a convenient start time, duration, and frequency — this allows regular watering without manual intervention.
• When you’re away or your schedule is unpredictable, the timer ensures your plants get water even when you’re not there.
• For winter: remove the device if freezing temperatures are expected — the water inside may freeze and damage the housing.
• Maintain normal pressure (0.5–8 bar) and good flow rate — if the pressure is too low or too high, or the filters are clogged, watering may be disrupted.

Before setting up irrigation

Take into account the inlet pressure, water source, and watering duration. Check the amount delivered with a test cycle.

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