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Ultra Dewatering Bags provide an effective way to collect harmful sediments from dirty water pumped out of excavation works that would otherwise pollute the surrounding environment.

Ultra Dewatering Bags - Hy-Tex (UK) Ltd.

Ultra Dewatering Bag

Pumped Sediment Control

Ultra Dewatering Bags

Hy-Tex Ultra Dewatering Bags provide an effective way to collect harmful sediments from dirty water pumped out of excavation works (such as foundations, pipe line construction, water, sewer and utility trenches, waterways and lakes) that would otherwise pollute the surrounding environment.

It is a legal requirement to prevent silty water from leaving site untreated, and a finable offence if you do not take appropriate pollution control measures. The Environment Agency Pollution Prevention Guidelines PPG6, in summary, require that the majority of suspended solids (gravel, sand, and silt) must be removed from site water before it is discharged into a drain, sewer or watercourse.

The standard 1.80 x 1.80m Ultra Dewatering bags has the capacity to trap near 1 tonne of silt and cope with flow rates up to 2,730 l/min, while the larger 3.05 x 4.55m bags can trap over 4 tonnes of silt and cope with flow rates up to 6,818 l/min.

Size Code Surface Area Max Flow Rate Max Pump Size Sediment Capacity Oil Capacity
0.91 x 1.22 m
(3 x 4 ft)
9729 2.23 m²
(24 ft²)
1,890 l/min
(500 gal/min)
10 cm
(4 inch)
0.17 m³ / 327 kg
(6 ft³ / 720 lbs)
4.5 l
(1.2 gal)
1.80 x 1.80 m
(6 x 6 ft)
9724 6.68 m²
(72 ft²)
1,890 l/min
(500 gal/min)
10 cm
(4 inch)
0.51 m³ / 980 kg
(18 ft³ / 2,160 lbs)
14 l
(3.7 gal)
3.05 x 4.55 m
(10 x 15 ft)
9725 27.87 m²
(300 ft²)
5,670 l/min
(1,500 gal/min)
15 cm
(6 inch)
4.20 m³ / 8,165 kg
(150 ft³ / 18,000 lbs)
57 l
(15.1 gal)
Feature ASTM Test Value
Material: Non-woven polypropylene geotextile
Grab Tensile Strength: D 4632 912 N
(205 lb)
Elongation: D 4632 50%
Trapezoid Tear: D 4533 356 N
(80 lb)
Puncture Resistance: D 4833 2,335N
(525 lbs)
Mullen Burst: D 3786 2,896 kpa
(420 psi)
Permittivity: D 4491 1.5 sec-¹
Pore Size: 180 micron
UV Stability: D 4355 70% strength retained after 500hr
Weight: D 5261 272 g/m²
(8 oz/yd²)
Flow Rate: D 4491 3,660 l/min/m²
(90 gal/min/ft²)

Features/Benefits

  • Collects harmful sediment before it can enter the watercourse
  • Cost effective solution
  • Multiple sizes to cater for all needs
  • Light, compact and easy to store
  • Only requires a small working area
  • 180 micron pore size

Data Sheets/Guidelines

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Ultra Dewatering Bags

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Guidance

  • 0.91 x 1.22m (3 x 4ft) bags are designed for a 4 inch pump's maximum flow rate
  • 1.8 x 1.8m (6 x 6ft) bags are designed for a 4 inch pump's maximum flow rate
  • 3.05 x 4.55m (10 x 15ft) bags are designed for a 6 inch pump's maximum flow rate
Ultra Dewatering Bags supplied by Hy-Tex (UK) Ltd. Tel: 01233 720097
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