Which types of fittings are allowed in concealed locations?

Prepare for the Propane Certification Test. Study with targeted flashcards and multiple-choice questions, each offering hints and insights. Ensure your readiness for the exam!

Threaded elbows, tees, and couplings are permitted in concealed locations largely due to their durability and the fact that they create a secure and leak-resistant connection. These types of fittings are designed to withstand the pressures typically associated with propane systems, making them suitable for concealed applications where they may not be easily accessible for maintenance or inspection.

In addition, threaded connections provide a robust solution that can be disassembled if necessary, allowing for maintenance or repairs without the need to replace entire sections of piping. This flexibility is particularly important in situations where the fittings are not visible, as it enhances the overall safety and reliability of the propane system.

Conversely, other types of fittings such as plastic fittings may not provide the same level of safety or durability, especially in concealed applications where exposure to heat and potential mechanical stress could lead to failure. Flexible fittings can also pose risks in concealed locations due to their potential for movement and wear over time. Clamps and bands, while useful for securing pipes, do not create the same type of sealed connection that threaded fittings do, making them less suitable for situations where leaks could pose significant hazards.

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