What might restrict drainage and cause insufficient steam supply to heating units?

Improper pitch refers to the angle at which drainage pipes are installed. For effective drainage, these pipes must typically be sloped correctly to allow condensate to flow away from the heating units and back to the boiler or condensate return system. If the pitch is too flat or improperly directed, condensate can accumulate in the pipes instead of draining away. This buildup can lead to water logging, restricting steam supply to the heating units, as the space intended for steam becomes occupied by water. Hence, maintaining appropriate pipe pitch is critical for ensuring proper drainage and optimal steam distribution to heating systems.