What is considered the minimum acceptable water pressure in a distribution system for residential use?

The minimum acceptable water pressure in a distribution system for residential use is typically set at 20 psi. This standard is important because it ensures that the water supply can adequately serve all household needs, including functioning of faucets, showers, toilets, and appliances like washing machines.

At 20 psi, residents can expect enough pressure for effective water delivery without significant issues related to flow rate. If the pressure falls below this threshold, there could be problems such as insufficient flow, which can lead to issues with poor performance of fixtures and increased likelihood of backflow.

Although higher pressures can provide better flow rates and mean more reliable delivery, ensuring a baseline of at least 20 psi is critical for maintaining functionality in a residential context.