Quote:
Originally Posted by MotoSook
As long as you're paying attention, perhaps you can help with another potential headache.
See the pipe going into the sand after the heater? I'm getting water around it and suspect a fitting is leaking. I'm hopeful the leak is not under the concrete and I can repair it.
If I have a leak under the concrete, is there a method to replace the pipe under the concrete that doesn't involve a concrete saw and a lot of dust (e.g. lining it)? 
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little smaller dia pipe inside the old pipe if not flow volume critical
1 1/2 fits inside 2''
and up the pressure [better pump or bigger upstream pipes] if flow volume is needed
and relooking that is the heater in water so very volume CRITICAL
there maybe guided drilling rigs that small but I have not seen them
is there more room on the other end for a drill rig?
btw it will not be cheap!!!!!!!!!!