This high-quality brass replacement valve is the perfect addition to your central heating system. The 15mm auto bottle air vent valve is compatible with various models and brands, including Air Vent. This valve is made of durable brass material, ensuring long-lasting use and reliable performance. Designed for easy installation and maintenance, this valve is an essential spare part for any home or commercial property. Whether you are replacing a faulty valve or upgrading your system, this 15mm auto bottle air vent valve is an excellent choice for ensuring your central heating system operates at its best.