Where should the Hartford loop be connected to the equalizer line?

The correct connection point for the Hartford loop to the equalizer line is 2 to 4 inches below the Normal Operating Water Level (NOWL). This placement is crucial for maintaining proper water levels within the boiler and ensuring safety in steam systems.

When the Hartford loop is installed at this height, it effectively helps to prevent the accumulation of water in the equalizer line during normal operation, thereby reducing the risk of water hammer and ensuring that the steam system functions efficiently. This configuration also allows for proper drainage of the system when it is in operation.

Establishing the Hartford loop at the recommended height provides a suitable balance between pressure and water management, critical for the steamfitting trade to ensure safe and effective boiler operation.