The Biolan Air Valve Set is a replacement component designed to regulate airflow within compatible composting toilets and ventilation systems. It helps control the balance of incoming air, supporting effective odour management and maintaining the right conditions for aerobic composting. The valve body fits neatly into the unit’s ventilation pathway, providing a stable and adjustable opening that allows the system to draw in fresh air as required. This assists with keeping the compost mass oxygenated and ensuring the toilet operates efficiently day to day. Manufactured from durable, weather-resistant materials, the air valve set offers long service life and is easy to fit when replacing worn or damaged parts. Suitable for Biolan composting toilets and compatible ventilation setups.