550 kpa (kilopascals) is equivalent to 79.77 pounds per square inch.
If the incoming water pressure is higher than that it's a good idea to
install a pressure reducing valve to prevent undue stress on equipment
and also "water hammering" and other noises.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.