At what pressure is a pressure relief valve usually set?

A pressure relief valve is typically set around 150 psi, a standard value that balances safety and operational requirements. This pressure level is common for residential and many commercial plumbing systems, as it allows for the effective prevention of excessive pressure buildup, which can lead to system failures or leaks. Pressure relief valves are designed to open and relieve pressure when the system reaches this predetermined level, protecting pipes and appliances from damage.

Choosing 150 psi as the set point allows for adequate pressure in plumbing applications while ensuring that the system will function safely under normal operating conditions. Configurations may vary based on specific applications or requirements of certain equipment, but 150 psi remains a widely accepted benchmark in the plumbing industry. When setting pressure relief valves, understanding the context and design of the plumbing system is critical for ensuring safety and compliance with plumbing codes.