Crisafulli FLUMP

Flump in a pond

FLUMP Sludge Removal System

The FLUMP (floating lagoon pumper) solves an industrial and municipal environmental problem in a low-cost, efficient manner. The FLUMP removes settled wastes and other by-products from settling ponds or lagoons, built to prevent wastes from leaching into the water-table.

Built tough to ensure dependable service in harsh environments, Crisafulli FLUMPs are simple to operate, and easy to transport. Crisafulli’s specialists have solved liquid waste problems for more than thirty years. Call us for standard applications -- or when no standard product will solve your problem. We will work with you to produce a Crisafulli Sludge Removal System that meets the specific requirements of your application.

Use the FLUMP to clean your pond or lagoon of sludge, sediment, biosolids or residuals.

Key Benefits of Flump Ownership

  • The FLUMP enables you to dramatically cut your sludge management costs.
  • Owning a FLUMP puts you in control of your dredging schedule.
  • The dredge operator isn’t exposed to potentially hazardous dredged materials.
  • Engineered for performance and quiet operation
  • High solids dredging performance with minimum turbidity
  • Easily transported to multiple sites
  • Our traverse system allows a single operator to change the dredges pond position in under twenty minutes.
  • FLUMPs now come with a high speed reverse, reducing the downtime between passes
  • Simple to maintain
  • Reliable and manufactured to last
  • Superior after-sale support from Crisafulli worldwide

Dredge Rentals Many domestic and Canadian customers rent Crisafulli’s Rotomite and FLUMP dredges on short-term rental contracts, and, after becoming familiar with the productive capabilities of the dredges, buy them.

Standard Models

FLUMP Standard Duty
Severe Duty
Severe Duty
Length (overall) 18 feet (5.3 m) 21 feet (6.4 m) 21 feet (6.4 m)
Height (overall) 7 feet (2.2 m) 7 feet (2.2 m) 7 feet (2.2 m)
Weight (approx.) 3,000 Lbs.
(1,361 kg)
3,250 Lbs.
(1,474 kg)
3,500 Lbs.
(1,587 kg)
Draft 1 foot (30 cm) 1 foot (30 cm) 1 foot (30 cm)
Pump Motor HP 25 HP (15 kW) 40 HP (20 kW) 50 HP (38 kW)
Cubic Yards* 15 / hour 35 / hour 40 / hour
Cutterhead width 4.5 feet (1.4 m) 8.5 feet (2.6 m) 8.5 feet (2.6 m)
Dredging depth 8 feet (2.4 M) 12 feet (3.7 M) 12 feet (3.7 M)
Sludge pump 3" S-series 3" J-series 4" J-series
Pump/Dredge discharge 3 x 4 inches
(7.6 cm x 10 cm)
3 x 6 inches
(7.6 cm x 15 cm)
4 x 6 inches
(10 cm x 15 cm)
Electrical power 3 Ph, 50 & 60 Hz 3 Ph, 50 & 60 Hz 3 Ph, 50 & 60 Hz
*Depends on the material and distance pumped


"We would like to thank you for your wonderful FLUMP. We have been dealing with our wet sludge lagoon for many years and have not always been totally successful. We found your system to be of excellent design and robust construction. The control system is direct and easy to understand."

David Miller, Division Head

Manchester Water Works
Read the full testimonial here

FLUMP Customers.

More than 175 municipal, federal, industrial, agricultural, and contractor customers in 42 states across America and 13 other countries own more than 206 Crisafulli FLUMPs. Several customers own two or more FLUMPs. In 2015, Crisafulli introduced its diesel powered FLUMP, the RDF-75, built with either a lightweight aluminum hull, or a steel hull.

Some applications for FLUMP dredges:

  • Dredge biosolids and residuals from a municipal water and wastewater lagoon
  • Dredge an industrial lagoon of waste, mine tailings, sediment, or slurry
  • Remove settled solids from a pond or lagoon without draining the pond or taking the pond out of service
  • Conservation project, including maintenance of a small pond
  • Clean your pond or lagoon of sludge, sediment, biosolids or residuals

    FLUMP Optional Feature

  • Variable Speed Sludge Pump
  • Fabrication in Stainless Steel
  • Flow Meter
  • Density Meter
  • Depth Meter
  • Automation
  • Liner Protection System
  • Limit Switches
  • Can be fitted with cast pumps