- Fertilisers / additives
- Lighting
- Growboxes
- Complete Units
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Ventilation
- Climate Control
- Watering
- Harvesting Devices
- Pest Control
- Hydrosystems
- Measurements PH-EC- etc
- Substrates
- Pots / Trays / Containers
- Seeds & Cuttings Supplies
- More Accessories
Check Valves
Our Check Valves provide reliable backflow prevention in your ventilation system. Ensure one-way airflow and maintain air quality with our high-performance check valves.
![Check Valves / Backflow Prevention Valves](https://www.green-door.ch/shop/c/75-category_default/check-valves.jpg)
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