What are the defining characteristics of a reliable suction hose?

A reliable suction hose is characterized by its flexibility, durability, and resistance to refrigerant leaks, which are crucial for the efficient operation of refrigeration and air conditioning systems. Flexibility allows the hose to be easily routed in tight spaces without kinking or breaking, ensuring proper flow and functionality. Durability ensures that the hose can withstand various environmental factors and maintain integrity over time, which is vital for long-lasting performance. Additionally, resistance to refrigerant leaks is essential to prevent loss of system efficiency and to ensure safety, as refrigerant leaks can pose environmental hazards and operational issues.

The other characteristics described in the other options do not align with the requirements for a reliable suction hose. Heavyweight and rigid hoses can be difficult to install and may not accommodate all installation needs. Lightweight and disposable hoses may not provide the necessary strength and durability for long-term use in HVAC applications. Finally, thick-walled and permanent hoses may be more challenging to install and may not allow for necessary flexibility in changing system configurations.