What is the minimum pressure that must be maintained in a water distribution system at service connections?

In water distribution systems, maintaining adequate pressure is crucial to ensure a reliable supply of water to consumers and to facilitate proper operation of the plumbing infrastructure. The minimum pressure that should be maintained at service connections is typically set to ensure that all fixtures can function effectively and that there is enough pressure to combat potential contamination risks from backflow.

The choice of 20 PSI is generally recognized as the minimum pressure standard in many water distribution system guidelines. This pressure level allows most residential and commercial plumbing fixtures to operate properly, ensuring that water can flow freely and that appliances such as showers, faucets, and toilets can function efficiently.

In situations where the pressure falls below this threshold, it may hinder normal water usage and can lead to potential safety issues, such as insufficient delivery to fire protection systems. It is also important for maintaining a positive pressure to reduce the risk of contaminants entering the distribution system during periods of high demand or pipe leaks.

Understanding the importance of maintaining this minimum pressure helps ensure that water utilities provide safe and accessible water for all customers, highlighting the significance of complying with established operational standards.