Upon arrival the customer directed me to the laundry and sink adjacent to washing machine. Informed me that the sink was recently backed up and that a gray water outlet pipe wasn’t flowing any longer. Ran water at sink for about 20 minutes total. Followed path of sewer drain from sink and found that it connects to mainline for house. Gave customer estimate to perform camera inspection to further investigate open pipe under deck. Also ran water at washing machine and found that washing machine drain discharges underneath deck.
