ICMA 91GS02OO20 Pre-Assembled Safety Group 1" F/F

The ICMA 91GS02OO20 is a professional-grade pre-assembled safety group designed specifically for closed-loop heating systems. Featuring a 1-inch female/female connection, this unit serves as a critical safety component that integrates a pressure relief valve, a pressure gauge, and an automatic air vent into a single, compact assembly. By combining these essential functions, the device ensures that the heating system operates within safe pressure limits while simultaneously preventing the accumulation of air, which can lead to noise, corrosion, and reduced heating efficiency.

Advantages

The primary benefit of this pre-assembled safety group is the significant reduction in installation time and labor costs. Because the safety valve, gauge, and air vent are already integrated into a single block, the risk of leakage at connection points is minimized compared to assembling individual components manually. The robust construction ensures long-term reliability and durability, providing consistent protection for residential and commercial heating circuits. Its compact design allows for easy integration into tight spaces, making it an ideal solution for modern boiler installations.

Suitable for

• Closed-loop central heating systems
• Residential boiler installations
• Commercial heating circuits
• Systems requiring automated air removal and pressure monitoring

When it may not be suitable

This safety group is not intended for use in open-vented heating systems or domestic hot water supply lines. It is specifically engineered for closed-loop circuits and should not be installed in applications where the pressure or temperature ratings exceed the technical specifications of the integrated components.

Key specifications

• Connection size: 1 inch female/female
• Integrated components: Safety valve, pressure gauge, automatic air vent
• Application: Closed-loop heating systems
• Design: Pre-assembled compact unit

How to use

Installation should be performed by a qualified professional in accordance with local heating system regulations. The unit is typically installed at the highest point of the heating circuit or directly on the boiler outlet to ensure effective air venting. Ensure that the connections are properly sealed using appropriate plumbing materials. Once installed, the pressure gauge should be monitored to verify that the system pressure remains within the manufacturer's recommended range for the boiler.

What to consider before purchase

• Verify that the 1-inch connection size is compatible with your existing piping
• Ensure the system is a closed-loop type
• Check that the safety valve pressure rating matches your boiler requirements

Usage recommendations: Regularly inspect the pressure gauge to ensure the system maintains optimal pressure. Periodically check the automatic air vent for any signs of blockage or leakage to maintain system efficiency.