Has anyone ever cleaned/relined pipes throughout a park? Is there a way to avoid digging up the entire park?
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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.
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You can line sewer lines but what about water coming into the park? Cant line due to the chemicals in the lining?
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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.