Sediment Filters

Sediment filters are the easy way to stay compliant with environmental regulations when dewatering excavations. They fit over the end of your discharge hose and filter out sediment. The cleaned water can be discharged directly into the environment or surface water drains.

  • More cost-effective than vacuum tankers or settlement tanks
  • Ease of use encourages compliant behaviour
  • Water discharged to Environment Agency accepted levels (150µm)
  • Rugged filters built for repeated use (up to 20x)
  • 20kg or 40kg sediment capacity

Find A Stockist


GRR 01 05 02 SEDO Sediment Filter 150 x 35cm 20kg 150µm 20x* 450L/min
GRR 01 05 10 SEDO Sediment XL Filter 150 x 80cm 40kg 150µm 20x* 800L/min

Product Overview

Why do you need a sediment filter?

Silt or sediment is a contaminant. When pumping water out of excavations, you have a legal obligation to filter out sediment before discharging into surface water drains or natural waterways. When working by the roadside, you also have a responsibility to keep pavements and roads clean and safe. Muddy or oily water can create a slip or skid risk.

Failure to abide by the law can lead to fines, prosecution, loss of contracts and clean-up costs. If you work in utility maintenance, fines and unbudgeted costs can wipe out your wafer-thin margins.

These rugged and reusable sediment filter bags provide an easy-to-use and cost-effective alternative to settlement tanks and vacuum tankers. Green Rhino dewatering filters clean water to regulator-approved standards. You may also know these filters by other names such as sediment dewatering filter bags, silt bags, filter socks or silt socks.

What are the benefits of a sediment filter?

With a Green Rhino Sediment Filter and a pump you have a dewatering solution you can deploy within minutes. It’s the easy way to comply with the law and much more cost-effective than using third party contractors to clean or remove the contaminated water.

Your workers are under pressure to get the work done. Help encourage compliant behaviour by providing environmental solutions that are hard-wearing, effective and quick to deploy.

You may also be interested in our Best Practice Guide to Dewatering Excavations.

Scalable & cost-effective system

Green Rhino dewatering filters offer an easy to deploy solution which can be scaled up to achieve higher flow rates. Up to eight sediment dewatering filters can be harnessed using the Green Rhino Manifold System. This reusable system delivers the flow rate and filtration capacity of a settlement tank without the expensive hire costs.


What size pump can a Green Rhino sediment filter be used with?

Filters are designed to be used with a 2” pump. If you need greater throughput, consider using a Green Rhino Manifold to harness four, six or eight filters at once. Manifolds are available with 4” or 6” connectors.

How does the sediment filter attach to the discharge hose?

Use the reusable cable ties provided with the dewatering filter. Tighten two around the collar of the filter to around 2/3rd the width of the hose. If pressure builds inside the filter, these are designed to break and release the pressure before damaging the filter. For this reason, do not use other methods such as chains or rope to secure the filter. If you have problems with filters becoming regularly detached then the flow rate is too high and/or you are not emptying the filter when full. If the flow rate is too high, consider using a Green Rhino Manifold to increase throughput.

How will I know when the sediment filter is full?

Sediment or silt filters need to be monitored. As the filter bag fills, flow rate will gradually decrease and the filter will look visibly full. Before the bag gets too full, pumping should be paused and the filter emptied. Refit the filter and commence pumping again. If the filter is left unmonitored there is a risk that the pressure will build and the hose will become detached. The reusable cable ties – provided for securing the filter to the discharge hose – are designed to break before the filter bursts. In between jobs, use a hose to wash the inside of the filter to prolong its lifespan.

Complete Range of Dewatering Filters

Our Sediment Filter is part of a comprehensive range of dewatering solutions: