Horizontal pipes in a hydraulic system should be sloped toward which component?

In a hydraulic system, horizontal pipes should be sloped toward the boiler. This is crucial for several reasons. First, the boiler is typically where the water or fluid is heated and then distributed throughout the system. By sloping the pipes toward the boiler, it ensures that any condensation or residual water within the system can effectively drain back into the boiler.

Additionally, proper drainage is essential to prevent issues such as water hammer, which can occur if there is standing water in the pipes. Ensuring a slope toward the boiler also helps maintain system efficiency, allowing for smooth operation and reducing the risk of blockages caused by stagnant water.

This approach contrasts with sloping toward components like a condensate pan or compressor, where the focus is not on the optimal return of the heating medium or supporting the heating process's integrity. Sloping toward the expansion valve or compressor does not provide the necessary drainage back to a heat source, which could lead to performance issues in the overall HVAC system.