What is the minimum water pressure required for residential plumbing?

The minimum water pressure required for residential plumbing in Massachusetts is 20 psi. This standard is set to ensure that adequate water flow is available for various household needs, including faucets, showers, and toilet flushing. A pressure of 20 psi is generally sufficient to provide a functional supply to fixtures and appliances without risking inadequate water delivery or system malfunction.

Maintaining this minimum pressure helps avoid problems such as slow filling toilets or faucets that do not deliver a proper stream of water. Values below 20 psi can lead to issues with water distribution within the household, affecting overall performance in plumbing systems.

Higher pressures, while potentially beneficial in certain scenarios, can lead to increased wear on pipes and fixtures, or even leaks, which is why a balance is necessary. The code aims to safeguard both functionality and the longevity of plumbing systems within residential properties.