SylvanLMP
Hi Steve, honestly the only thing you can do after the fact is try to monitor the in coming pressure to make sure the velocity (FPS ) doesn’t exceed 6-8 FPS on CW piping and 2-3 FPS on hot water piping. The hotter the water the more chance of corrosion and or erosion.
You should also have your water tested as for not only quality but the pH factor.
Other than that your kind of limited what can be accomplished to piping already buried. The exposed piping should be supported as per local codes and NEVER with garbage (band iron) Use copper coated clevis hangers and double check all quick (solenoid) closing valves to prevent water hammering (hydraulic shock waves) Good luck
