Information Sheet: Pressure Temperature Relief Valve/Line

What is a PTR Valve?

A Pressure Temperature Relief (PTR) valve, also known as a TPR valve, is a crucial safety component installed on hot water systems. Positioned externally, it contains a sensor probe within the hot water tank, designed to respond to rising temperatures. In the event of a malfunction causing overheating, the valve expands, allowing water to escape. This action alleviates excess pressure within the system, preventing potential catastrophic failures.


Importance of Location

Proper placement of the PTR line is critical for safeguarding occupants and maintenance personnel. Since the valve can release boiling water unexpectedly, proximity to individuals during troubleshooting or maintenance poses a burn hazard. Ensuring the PTR valve is positioned away from high-traffic areas or areas where occupants may inadvertently come into contact with the discharged water is paramount for safety.


Regulatory Considerations

While our focus is on optimising safety for occupants and maintenance personnel, it's essential to note that specific regulations govern the placement and discharge of PTR valves. These regulations dictate where discharged water should drain and the types of surfaces it can safely drain onto. While we prioritise safety, other aspects of building code compliance, such as drainage configurations, fall outside our scope.

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