The connection between a boiler and the safety valve must be at least what size?

The requirement for the connection between a boiler and the safety valve to be at least the area of the valve inlet is based on the principles of ensuring proper operation and safety of the boiler system. Having a connection size that matches the area of the valve inlet allows for adequate discharge capacity in case the valve opens under pressure. This ensures that steam or hot water can exit the system without any restrictions, which can prevent dangerous buildup of pressure within the boiler.

If the connection were to be smaller than the valve inlet size, it could restrict the flow, leading to potential pressure accumulation that compromises safety mechanisms. The design standards prioritize user safety and equipment reliability, and therefore, maintaining an equal size connection serves as a critical guideline in boiler installation and maintenance practices. This adherence to safety regulations helps to mitigate risks associated with system failures and contributes to the overall integrity of the heating system.