Customer stated: they had a black partials coming out of their faucets. Tech notes: called out today to look for black particulate in the home owners water. While on site I ran a couple of faucets and little bits of rubber from the ariators were causing the black particals. I explained to the home owner that she needs to clean her ariators by twisting them off to clean them then twisting them back on. Resolution: home owner needs to clean ariators. Job status: complete. Job notes: Could not check pressure due to hose bibs were not on and shut offs are covered behind drywall. Could not check pressure at water heater due to plastic drain.