Dandy Supports You and the Environment

Contractors must periodically remove accumulated sediment and dispose of it according to their project's stormwater pollution prevention plan (SWPPP) and applicable regulations. Collected material should be kept away from drainage pathways to prevent it from washing back into the stormwater system.

Very fine particles, including clay, remain suspended in water longer than coarse sediment and are harder to capture through filtration alone, and that’s normal. If you’re experiencing excessive flow or sediment bypass, that can also reduce filter effectiveness. Contractors should evaluate filter performance and consider additional upstream sediment controls if runoff is still extremely muddy after moving through the filter.

Reusable inlet protection helps reduce material waste by extending the useful life of filtration products across multiple installations. However, reuse depends on proper maintenance and product condition. Damaged or severely clogged filters should be replaced rather than reused at the expense of filtration performance.

No. Inlet protection captures sediment near drainage openings, but contractors also need measures to prevent soil erosion upstream. Stabilized slopes, perimeter barriers and sediment basins help reduce the volume of loose soil reaching storm drains in the first place.

Projects near sensitive waterways need extra attention because sediment has a shorter path to receiving waters. Site-specific permits and environmental requirements determine the necessary controls. Contractors should evaluate runoff pathways and establish appropriate erosion prevention measures before beginning soil disturbance.

Standard geotextile inlet filters primarily capture suspended soil particles and debris. Dissolved chemicals and other contaminants require different treatment methods. Some Dandy products accommodate optional oil absorbents, while specialized products like Dandy Skimmer target floating oil.

An undersized or clogged filter restricts drainage and causes water to accumulate around the inlet. Select products with sufficient flow capacity for the drainage area, and remove accumulated sediment before it obstructs filtration. Check the site's drainage requirements before changing or removing installed protection.

Filtered water should flow onto a stable, suitable discharge area without creating additional erosion. Contractors must account for drainage pathways and applicable discharge restrictions. Placement near steep slopes, waterways or unstable ground increases the risk of sediment entering surrounding water resources.