In a hydronic steam system, horizontal pipes should always slope towards which component?

In a hydronic steam system, horizontal pipes should always slope towards the boiler. This design is essential for ensuring that condensate, which is water formed when steam cools, efficiently returns to the boiler for reheating. By sloping the pipes in this manner, gravity helps the condensate flow back towards the boiler without collecting in the lines or causing water traps, which can lead to inefficiencies, water hammer, or even damage due to water accumulation.

When the pipes slope towards the boiler, it promotes the effective conversion of steam to water and back to steam, maintaining a consistent cycle of operation in the system. Properly designed slopes prevent issues that arise from improper drainage, enhancing system performance and prolonging the life of the components involved.