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Catch Basin Silt Sack


SKU MM-DS-24-24

Our catch basin silt sack is commercial grade and made in the USA from monofilament fabric. They easily install on your storm grate without any rebar required. Whether you’re doing a residential or commercial job you need to protect the storm water system from sludge and sediment.

Our catch basin silt sack comes in a variety of sizes to make sure they can fit almost any need. Maintenance is a breeze, just empty the sediment and sledge out as the bag gets full and then reinstall to be used again.

The catch basin silt sacks are made in bright orange making them easy to see so the inspector knows which inlets to check just by walking by.  


Product Specifics

  • Free Shipping
  • Need a Written Quote
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  • Questions? Call (800) 640-5537

Product Features

  • Affordable price
  • Super easy installation. No rebar required
  • Internal straps cradle the grate for added support and security when installing and removing
  • Two-foot containment area is manageable
  • Easily seen because it's fabricated from a bright orange monofilament geotextile


  • FREE SHIPPING (standard ground, see map)
  • Call: (800) 604-5537 for pricing and ship times

Shipping estimates shown on the map pertain to this specific product only. Orders typically ship in 1-3 business days if the order is placed before 12:00 noon EST. Transit times displayed in the map are listed in business days, and are approximate. The day that the order is shipped is not counted as a transit day.

Installation and Maintenance Guidelines


  • Remove the grate from catch basin.
  • If using optional oil absorbents, place absorbent pillow in pouch on bottom of the unit.
  • Stand the grate on end. Move the top lifting straps out of the way and place the grate into the Dandy Sack so that the grate is below the top straps and above the lower straps.
  • Holding the lifting straps, insert the grate into the inlet.
  • Maintenance:

    •  Remove all accumulated sediment and debris from vicinity of the unit after each storm event.
    • After storm event and at regular intervals, look into Dandy Sack. If containment area is more than 1/3 full of sediment, the unit must be emptied.
    • To empty unit, simply lift the unit using lifting straps and remove the grate. If using optional oil absorbents, replace absorbent pillow when near saturation.
Inlet Protection System Manufacturing

Dandy Sack in Production

Dandy Inlet Protection Systems

Dandy Sack is a high quality, and uniquely designed inlet protection product. It is made of safety orange monofilament geotextile which helps it to look new even after multiple uses. The suspended solids settled out of the slowed flow and then captured by the Dandy Sack prior to entering the inlet.

All Dandy Products are made in America.

Catch Basin Silt Sack Installation

Workers Installing Catch Basin Sack

Ways To Prevent Pollutants From Going Down Storm Drains

When heavy rainfall hits an area, the water will rush into the storm drains. Most stormwater comes with runoff from city streets, homes, parking lots, industrial facilities, and construction sites. These storm waters also carry a lot of sediment, pesticides, fertilizers, oil, pet waste, gasoline, and other hazardous waste.

As stormwater is not treated water, the runoff will flow into the storm drains and will be directly discharged into nearby bodies of water along with many pollutants.

Construction Site Activities

Construction sites are one of the leading culprits for moving many unwanted pollutants found in water into other areas. Most of us do not think of dirt as a pollutant but it can cause many problems for streams and creeks when it is washed off construction sites. One of the leading activities performed at construction sites is excavation. Excavation destroys protective vegetative layers that hold soil in place and can happen 40 times more often than the normal rate.

The increase in construction site activities has led to an increase in erosion allowing stormwater runoff to move pollutants to nearby storm drains, rivers, and lakes including sediment, debris, pollutants, and other harmful elements.

What you might not understand, construction sites will contaminate rivers and streams, kill or harm fish along with other wildlife, destroy aquatic habitats, and seriously degrade the quality of the water.

Think of it this way, a construction project can affect an acre or more of land and even less than an acre for a housing project. These activities are required to have a permit for their stormwater discharge. These permits were put into place due to concerns that storms could wash away loose dirt from sites but have since grown to include sources of pollution from their activities.

To prevent runoff from washing harmful pollutants into surface water, permit holders are required to create a stormwater pollution prevention plan, or SWPPP, with control measures and pollution prevention plans.

The Division of Water Quality (DWQ) has created a list of the Top Ten Best Management Practices for construction sites to help contractors reduce pollutants from being released into stormwater.  Some preparation and planning before construction begin on a site can go a long way in preventing pollutants from entering stormwater.

Catch Basin Sack Hung Under Grate

Silt Sack Attached to Grate

Dandy Silt Sack for Catch Basins

Catch Basin Silt Sack

The Division of Water Quality's BMPs incorporated the following strategies for construction sites:

Preserve existing vegetation in order to reduce erosion.

Have phased construction so the soil will not be exposed for long periods of time

Have proper management of construction entrances.

Install silt fencing or other perimeters to prevent pollutants from leaving the site.

Have storm inlet filters to prevent trash and debris from getting into the storm drains.

Protection and installation of vegetative buffers along bodies of water.

Site stabilization with mulch or vegetation once the land disturbance is completed.

Manage equipment fueling to prevent spills.

Construction solid wastes and paint/concrete cleaning water waste are included under Waste management.

Fugitive dust suppression.