This document describes a new inlet protection device that can help meet MS4/NPDES permit requirements. The inlet expander protector stops debris from entering storm drains and draining to waterways. It is available in 3 standard sizes, and custom sizes can be made. The device was tested at various water pressures and flows and was able to contain debris and allow water to drain. Several cities in Texas have approved the device, and it is suitable for use in high traffic areas, environmentally sensitive areas, and construction zones to prevent pollution from entering stormwater systems. Contact information is provided to learn more.