A. J. Monier & Co. Inc. is a full-service mechanical contractor. The company offers a range of services, such as plumbing, heating, ventilation and air conditioning (HVAC) services. Located in San Antonio, Texas., its plumbing services include drain cleaning/repair sewer line, gas line replacement/repairs, sewer camera video inspect, faucet and fixture replacement. The company has worked on various projects, including the hotels, commercial, health care and church facilities. A. J. Monier & Co. Inc. is a member of United Association of Plumbers and Pipefitters.