What is the outlet pressure in older buildings that do not have a pressure restriction?

The outlet pressure in older buildings that lack pressure restriction typically exceeds 300 psi. This is often due to the age and design of the plumbing systems, which can allow for higher water pressure to be maintained. In many cases, older infrastructure does not have modern pressure-reducing valves, which would typically control and lower the water pressure to safer levels suitable for contemporary standards and equipment.

Older systems, particularly those that may have been designed for higher pressure to meet the demands of firefighting and other building systems, can be prone to high outlet pressures. This could pose risks of damaging equipment or causing plumbing failures if proper regulations and updates are not implemented.

The other options suggest lower pressures, which do not accurately reflect the reality found in many older buildings without pressure modifications. Understanding these pressure levels is crucial for firefighters and emergency personnel to ensure they can operate effectively and safely within these environments.