Our park has sections that have some older galvanized lines. We didn't have any data on when they were installed, but I would assume they are from when the park was built ~60 years ago.
Someone from the water authority was out recently and took water pressure readings at two points. The readings are here:
(there was a water leak in a riser fixed part way through which is what caused the jump on this reading)
I spoke to the individual who conducted the water tests, and said the pressure drops too low and he thinks we should replaced all of our lines.
Does anyone with more experience on this subject have any thoughts or insights? It seems reasonable enough, but before I spent hundreds of thousands of dollars it would be nice to be more confident in my assessment.
Also, after doing some searching, there's a company that produces a product that slowly clears out the inside of pipes:
After researching some more it sounds like it could work, but would be a fairly slow moving solution. After installing a pump to administer the product it would only cost about $12 a day.
However, these lines are likely at the end of their useful life, so I would guess they won't last long no matter what I do.