How should pipe be secured at the bottom of a hill and at any lateral or vertical turns?

Pipe should be secured at the bottom of a hill and at any lateral or vertical turns to ensure stability and prevent movement that could lead to damage or failure of the system. Securing the pipes in these critical areas is essential because changes in elevation and direction can create stresses within the pipe that, if left unaddressed, may compromise the integrity of the installation.

By restraining the pipe, it maintains its position and alignment, which is vital for the proper functioning of the fire service mains. This includes ensuring that the system can withstand external forces, such as hydrostatic pressure from water or mechanical forces from surrounding soil. Proper restraint helps mitigate potential issues such as bends or buckles in the piping system, which can hinder the flow of water during emergencies.

It is important to recognize that while some options suggest alternative approaches such as being unsecured or free to move, these would not provide the necessary stability and could result in system failures or leaks. Thus, the practice of securing pipes through appropriate restraints is essential for maintaining the effectiveness and reliability of fire service mains.