Technician arrived and confirmed water in garage coming from above first brick of fireplace. Water appeared to have rust in it. Tech entered craw space under house to confirm water main was at opposite end of house, area of leak was under slab, with no water pipes appearing to run into that area. Tech added 5 psi to boiler system then shut auto feed and turned off boiler. The psi dropped 5 psi within several minutes. Boiler was turned back on with water feed as well to ensure customer was left with heat. No estimate was given , Anthony wants him or nick to return with tech to confirm findings.