Abstract: Disclosed herein is a utility isolation system designed for residential, commercial and industrial usage. The system comprises a bidirectional valve connected to a sewer line which valve responds to a change in the level of a body of water. The system prevents high water levels from entering municipality's sewer infrastructure systems. The isolation system monitors levels of a body of water and also prevents releases from hazardous sewer waste entering rivers, lakes, and coastal waterways. The isolation system provides protections from waste water back flowing into homes and buildings, and causing electrical shorts, or natural gas releases, and blocks potable water lines from filling plumbing devices with open drains such as lavatories and toilets during a high water level event. The system can be remotely activated and monitored by a user, a government office, or service provider via SCADA (Supervisory Control and Data Acquisition) or like system.