Backflow Preventer Installation Service near S Ulster St. At the request of a residential client, I visited their home to install a backflow preventer as a vital safety measure for their water supply. After assessing the property's plumbing system and determining the appropriate location for the device, I expertly installed a high-quality backflow preventer. This device would effectively prevent the contamination of the client's potable water supply, providing peace of mind and ensuring the safety of their drinking water. The client appreciated our attention to detail and commitment to their health and well-being.