The test pressure shall be what value for the hot water heating system?

The test pressure shall be what value for the hot water heating system?

• A. 60 PSI
• B. 100 PSI
• C. 80 PSI
• D. 120 PSI

Answer: (B)

Testing the hot water heating system by hydrostatic pressure uses a value that sits above normal operating pressure to reliably reveal leaks and weak joints. A test pressure of 100 psi is chosen because it provides a safe margin above typical domestic supply pressures (usually around 60–80 psi) while staying within the pressure ratings of common piping, fittings, and valves used in residential systems. This helps verify that the entire system can withstand higher-than-normal pressure without failing. Choosing 60 psi or 80 psi wouldn’t stress-test the system enough to uncover leaks or weak connections, while 120 psi could exceed what some components are rated to handle and risk damage.

Testing the hot water heating system by hydrostatic pressure uses a value that sits above normal operating pressure to reliably reveal leaks and weak joints. A test pressure of 100 psi is chosen because it provides a safe margin above typical domestic supply pressures (usually around 60–80 psi) while staying within the pressure ratings of common piping, fittings, and valves used in residential systems. This helps verify that the entire system can withstand higher-than-normal pressure without failing.

Choosing 60 psi or 80 psi wouldn’t stress-test the system enough to uncover leaks or weak connections, while 120 psi could exceed what some components are rated to handle and risk damage.