Had to do some pipe rerouting at my well for the geothermal units. The pipes that I taken out had a build up appear to be dirt or clay about 3/32 of inch thick.This is on a commercial building with 42 tons of a air/heat system.How would I go about cleaning the pipes and exchanger through out the entire system. I have connected to it two 16 tons units plus a 6 tons and a 5 tons unit. I would think with this kind of build up that my efficient has gone down hill. These unit have been in service for about 7 years.