Which piping configuration is associated with maintaining a slope toward the tank?

Suction piping is specifically designed to maintain a slope toward the tank to allow gravity to assist in the flow of liquids back to the tank. This configuration is essential in ensuring that the system effectively retrieves liquid and minimizes the risk of vapor lock by keeping the entire pipe filled with the product.

In a suction system, the pipe's slope is critical because it helps maintain pressure within the system. By orienting the piping downward toward the tank, any liquid in the line can easily flow back into the storage tank, enhancing the system's efficiency. This setup is common in many fuel dispensing systems where it is vital to ensure a constant and reliable flow of fuel from the tank to the pump.

The other configurations mentioned do not prioritize a sloped design toward the tank in the same way. Continuous piping often emphasizes creating a path with minimal disruption but doesn't specifically focus on gravity feed toward a tank. High-pressure piping systems are more concerned with transporting fluids under elevated pressure and may not operate under the same dynamics as suction piping. Low-pressure piping, while it may handle fluid transport, does not inherently require a slope toward the tank for operational efficiency like suction piping does.