What is the standard pressure for a residential water supply system?

The standard pressure for a residential water supply system is typically in the range of 40 to 60 psi. This range is considered optimal for delivering sufficient water flow while also ensuring that fixtures, appliances, and piping are not subject to undue stress.

Operating within this pressure range helps to prevent issues such as leaks, bursts, or excessive wear on plumbing fixtures. If the water pressure is too low (below 40 psi), it might not provide adequate flow for daily activities like showering or filling appliances, while pressures above 60 psi can increase the risk of damage and maintenance issues.

Residential plumbing codes often reference this pressure range to ensure safety and functionality, making it the widely accepted standard for water supply systems in homes.