Unions are a common threaded connection used in low pressure applications.

Unions are a common threaded connection used in low pressure applications.

• A. True
• B. False
• C. They are used only for high pressure
• D. They are not threaded

Answer: (A)

Unions are fitted as quick-disconnect threaded connections that join two pipe ends with a nut and gasket, letting you disassemble the joint easily for maintenance without cutting or reworking the piping. This design is well suited to low-pressure systems where you want serviceability and straightforward sealing with a gasket or o-ring. While they can be used in higher-pressure systems if designed for it, their ubiquity in low-pressure piping comes from the simple, reliable seal and easy disassembly they provide. So the statement is true.

Unions are fitted as quick-disconnect threaded connections that join two pipe ends with a nut and gasket, letting you disassemble the joint easily for maintenance without cutting or reworking the piping. This design is well suited to low-pressure systems where you want serviceability and straightforward sealing with a gasket or o-ring. While they can be used in higher-pressure systems if designed for it, their ubiquity in low-pressure piping comes from the simple, reliable seal and easy disassembly they provide. So the statement is true.