■ Features: This product maintains high pressure in the cooling system and reduces the cooling water from boiling up to improving cooling performance. Compared to standard products with opening pressure of 0.09 MPa (0.9 kg/cm2), boiling point increases at approximately 14°F (6°C). ■Specifications: Outer diameter φ45 Operating valve pressure P=0.13 MPa (1.3 kg/cm2) Seal: heat-resistant silicone rubber ■Compatible models (cannot be installed in cold areas) Please check the manufacturers website for the latest information.