In pipe testing, what gauge is required for increments when testing below 10 psi?

When performing pipe testing at pressures below 10 psi, the requirement is to use a gauge that can measure increments of 1 psi. This precision is necessary to ensure that any pressure changes can be accurately monitored, allowing for effective detection of leaks or system failures. Using a gauge with 1 psi increments ensures that the pressure test can be conducted with the necessary sensitivity to meet code requirements while ensuring safety and integrity in the system being tested.

At lower pressures, such as those below 10 psi, more precise increments are critical for reliable results, which is why the use of a 1 psi gauge is mandated in this scenario. This precision helps maintain adherence to safety standards and best practices in mechanical installations and testing procedures.