Built-in pressure gauge provides real-time monitoring of system pressure, ensuring optimal performance and easy troubleshooting. All-in-one brass assembly combines three essential functions for comprehensive boiler protection, simplifying installation and maintenance. Integrated valve automatically releases excess pressure, preventing overpressure situations and safeguarding your equipment from damage. Automatic vent continuously eliminates trapped , maintaining efficient heat transfer and preventing circulation issues in hydronic systems. devised for DN20 size, this valve assembly offers optimal flow capacity for both residential and commercial heating applications, ensuring reliable long-term performance., Manufacturer: OTENG