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Dewatering Bags - Ultratech®

Contain silt, sediment & oil pumped out during dewatering operations

Ultratech® Dewatering Bags - Features

  • Detains both oil and sediment/silt, offering a combination of benefits not available in alternative dewatering bags.
  • Standard and custom sizes available.
  • Accommodates up to 4" discharge hose.  Optional hose connector available - makes connecting and disconnecting Dewatering Bags quick and easy.
  • Helps comply with NPDES, 40 CFR 122.26 (1999) and TMDL requirements.
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NOTE: To increase the efficiency of filtration, place the bag on an aggregate or haybale bed to maximize water flow through the surface area of the bag. 

Product Details

Draining swampy or low-lying areas is a common occurrence in construction. Unfortunately, pumping out the water from these areas also removes a lot of dirt, silt, mud, and debris along with the water. These contaminants can cause problems if they are simply discharged into a storm drain.

The Ultra-Dewatering Bag provides an economicaland effective solution. By pumping water into the bag, silt, dirt, sand and other pollutants are trapped and filtered so only water escapes to the ground below or nearby storm drains.

Product Specifications

Are we missing the specification you need? Please go to our Contact Us page and submit your question to us, or call 1-877-284-7760

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Looking for a quotation ? We would be happy to help by providing a quick response, inventory status, and Volume Level pricing, when available. Please fill out the form below and a representative will be in touch with you within hours to one business day to answer any questions and quote your request.

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Frequently Asked Questions

Have a question that is not answered here? Please go to our Contact Us page and submit your question to us.


Is there a way to maximize flow through the bag?
The total flow rate through the Dewatering Bag can be maximized by getting it off the ground.  While water will flow through a Dewatering Bag laying flat on the ground, it will be impeded by the solid/saturated soil it is on.  By placing the bag on large aggregate or on hay bales, the water will be less restricted as it flows through the bottom layer of geotextile fabric.

What is the flow rate?
The maximum flow rate of the Ultra-Dewatering Bags, when new, is 500 gallons/min.  For more information, check out our specifications.

What should I do with the bag when it's full or I’m done dewatering?
When the Dewatering Bag is full, it should be disposed of as directed by the site engineer and in accordance with any local regulations and requirements.  Often times, it can simply be cut open and the contents dispersed.

I need a Dewatering Bag in a size that is not listed.  Can you make that for me?
Yes, we can do custom sizes (and shapes).  Please contact us for a quote.

How do I secure the Dewatering Bag to the discharge hose?
If your flow rate is not too high, you can use the attached straps to tie off the bag to the hose.  If water is being discharged at a higher flow rate, a hose clamp may be required (not included).  You can also use our optional Hose Connector (Part# 9739) to make the connection quick and easy.

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