Has anyone ever cleaned/relined pipes throughout a park? Is there a way to avoid digging up the entire park?
Yes, there is a way to fix underground sewer lines without digging up the roads.
One way is to use a pipe lining service. Search for trenchless pipe lining in your area to find a company specializing in this type of work.
You can line sewer lines but what about water coming into the park? Cant line due to the chemicals in the lining?
Water lines are much simpler to replace as you don’t need to consider the fall.
Unfortunately, digging up the entire park to replace the water lines would be best. Ugg.
I have found that patching water lines is better than a complete replacement, assuming the water lines are made of PVC. If you are dealing with AC Water lines, Galvanized or Copper, a one-time replacement will be more cost-effective than playing Whack-A-Mole with leaks over the next 20 years.
There are some trenchless options, but they are for short sections. If you must cross a road with a trench, I will install a speed bump over the trench line.