A Condominium Complex is required to locate #sprinklers in the attics. This in turn requires antifreeze in the attics. The antifreeze installed is GL-48. When the system was built the contractor used check valves between the antifreeze and the town water that have a 1/32 inch hole to account for changes in pressure differentials. This in turn allows a small amount of antifreeze to leak into the fresh water. The antifreeze and water has a measured ph that is acidic. This in turn is believed to cause a small number of pinhole size leaks in flange areas of the trap section of the system. Is there a procedure for introducing a liquid in this part of the system to alter the combined liquids so they have a ph above 7?