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The automatic SpiroTop air vent offers strong and durable protection against free air in water systems, preventing component damage and failure. It operates at pressures up to 25 bar and temperatures up to 200 degrees Celsius. Its solid valve seats and floats ensure long-lasting performance. This air vent is available in various pressure and temperature ranges, providing reliable passive protection. With its robust construction and solid floats, it keeps your system safe and requires hassle-free installation.. Spirotech SpiroTop AVV 1/2 inch Brass Automatic Air Vent - 150 Degrees Celsius (25 Bar) AB050/025 SV5-25