What is the size of the connection used to attach a test gauge for pressure gauge accuracy?

The size of the connection used to attach a test gauge for pressure gauge accuracy is typically 1/4". This size is standard for many pressure gauge ports because it allows for a good balance between ease of connection and the ability to obtain accurate readings. The 1/4" connection is designed to accommodate the common fittings used in pressure testing without restricting the flow or causing interference in the measurement.

In different applications, while other sizes like 1/2", 3/4", and 1/8" might be used for various components of a boiler system, the 1/4" size specifically facilitates the mounting of test gauges and is widely recognized in practices regarding pressure testing due to its compatibility and effectiveness in achieving precise measurements. Understanding this standard aids in ensuring proper gauge installation and maintenance in boiler operations.