How CWS Planter Liners Work.

CWS Planter Liner vacuum-sensor reservoir surrounds the planting area, and is filled by hand every 1-2 weeks for exterior applications and every 3-4 weeks for interior applications. The fill hole is plugged with a stopper, creating an airtight reservoir.
When the soil is dry (indicating the plants need water), the moisture sensor allows air to pass through the clear tube into the reservoir, allowing water to flow into the container from the water inlet locations along the bottom of the liner. One moisture is all that is required for CWS Planter Liners up to 72"L. The water wicks up through the soil, irrigating the plants. As the soil becomes moist, the sensor (typically planted 1/3-way down the liner) absorbs water. When wet, it acts like a valve, blocking the flow of air through the tube. A vacuum is created above the reservoir, preventing further watering until the soil dries again.

Overflow drainage adapter – a free-draining overflow adapter for CWS Planter Liners in exterior applications. The adapter allows rainwater to drain, but will prevent irrigation water from overflowing under normal conditions.

When installed, the overflow drainage adapter allows excess water that builds up (typically rainwater) to escape without disrupting the system.