Carthage FBX® Series of Dewatering Filter Bags

dewatering bags


Carthage Mills’ FBX™ Jobsite Dewatering Filter Bags are designed to trap silt, sand and other sediment fines from construction sites before they do damage to the environment. They also assist the contractor with an economical way to avoid the costly cleanup of storm water systems.

Typical applications include the dewatering of construction and excavation sites, as well as dewatering lakes and ponds.

FBX-80 is Carthage Mills’ standard Jobsite Dewatering Filter Bag, and is manufactured with FX-80HS, a sturdy 8 oz/yd2 nonwoven geotextile. FBX Filter Bags can also be made using a wide variety of geotextiles. Factors to be considered include overall size requirements, the type of sediment being pumped, as well as other site-specific or Engineering specification needs.

All FBX™ Filter Bags are constructed using a double-needle J-seam. Additionally, they also incorporate a fabric flange large enough to accommodate up to a 6″ discharge hose using the attached heavy-duty straps.

As water is pumped through the dewatering bag, it captures most of the sediment, and as a result the discharge is clear to near-clear water. Eventually, when full, the FBX Filter Bags can be disposed of as a solid waste. Additionally it will need to be cut open and mixed with the on-site soil and seeded, or otherwise directed by the site engineer.


Carthage Mills’ FBX Filter Bags are a cost-effective means to help protect the environment as well as meet storm water regulations.

  • Removal of dirty or muddy water from holes and low-lying areas around construction sites
  • Dewatering of ponds and lakes
  • Draining trenches around pipe line construction and also during repair of municipal water and sewer lines
  • Highway construction
  • Around building foundations
  • Marine Construction


Carthage Mills’ FBX Filter Bags are easy to install and maintain. They are designed for one-time use

  • For maximum flow and filtration, FBX™ Filter Bags should be placed on a level bed of aggregate or hay bales.
  • Next, insert the discharge hose and secure it tightly using the attached straps.
  • Discharge Rate: FBX Filter Bags can typically accommodate flow rates up to 1,000 gal/min when empty. This decreases as the bag collects sediment and should be monitored to avoid rupture of the bag or excessive leakage around the discharge hose.
  • FBX™ Filter Bags and the trapped sediment should be disposed of as directed by the site engineer or local regulations.


  • FBX Filter Bags are stocked in a variety of sizes from 5′ x 5′ up to 15′ x 30′. Call for pricing and availability.
  • Custom sizes are available upon request