Plumbing Work
When you turn on the water for at least the last twenty years, the pressure is acceptable for about 15 seconds but slows down by over 50%. A plumber (here for another reason) thought it was due to either too much pressure removed from the street or obstruction within the pipe going from the house to the street. The city checked the street pressure and said it was fine as it entered my system so they couldn't help. I either need to replace the piping or add some pump.
Please reach out if you can help. Thank you.