Boiler Pressure Relief Valve - Boiler Safety
The boiler pressure relief valve is a safety valve designed to relieve an excessive build up of pressure inside the boiler. The is a pressure vessel designed to handle a safe amount of pressure. If the pressure were to build up beyond the safety limitations as set forth by the design specifications the boiler system needs a safe way to vent the pressure to prevent an explosion. Furthermore, the boiler relief valve is this safe way to vent excessive dangerous pressures inside the boiler.

Boiler Pressure Relief Valve

This pressure safety relief valve is piped into a nipple on the side of a Burnham boiler. The relief valve is piped to a drain so if the relief valve were to vent it would vent all the hot water to a safe place. A place away from people or electrical circuits. As part of a boiler preventive maintenance plan, these valves should be checked for seeping or dripping. Any safety relief valve found dripping or seeping should be replaced. Consequently, most residential and light commercial hot water boilers have safety relief valves that will vent at 30 psi.

In the old days, some boilers did not have any pressure relief valves installed on the boiler. It was not uncommon for the system to build up the pressure and an explosion occurs. Typically, this would send the boiler through the roof of the house. Insurance companies got tired of paying the cost associated with these explosions. Therefore they decided to implement safety requirements as recommended by industry professionals and engineers. Professionals involved in boiler safety issues. As these changes were made some of these requirements were added to the mechanical and boiler codes. Codes for various states and municipalities.

Boiler Pressure Relief Valve | Code and Conclusion

Therefore, it is now in the mechanical code that a boiler is required to have a safety pressure relief valve. A relief valve to prevent too much pressure from building up in the pressure vessel whether it is steam or hot water. Lastly, make sure your boiler pressure relief valve is in proper order.

High Performance HVAC

Boiler Pressure Relief Valve – Boiler Safety

To learn more about heating systems and HVAC use this resource.

See the About the Author page for information about the author of this article.

Share your HVAC Photos or ask a question about your HVAC System by uploading a photo of it.

Photo Uploads
Enter your name so we can credit you
If you have a website enter your website URL for additional credit
If you want to include a description then do so here.
Drop a file here or click to upload Choose File
Maximum upload size: 33.55MB
jpe, jpeg, jpg, gif, png, bmp, docx, doc, txt and PDF files allowed to be uploaded. Limit 15 files total and 100 mb/s max size.