Chopping Action

Vaughan's patented chopping action significantly reduces downtime by not only eliminating clogging problems, but also reducing downstream issues with solids. The built-in chopping design also eliminates the need for a grinder or comminutor to condition solids prior to pumping. The elimination of clogging issues means less manpower wasted unclogging pumps. All Vaughan chopper pumps are available with a written non-clog guarantee, which is your assurance of clog-free operation.

From Rags to Riches: Chopper Pump Gets It Done   Vaughan Centrifugal Chopper Pump In Action   The Lift Station Solution
From Rags to Riches: Chopper Pump Gets It Done   Vaughan Centrifugal Chopper Pump In Action   The Lift Station Solution


Vaughan's hydraulic submersible centrifugal chopper pumps are used in vane or piston hydraulic motors...

The Vaughan Conditioning Pump is a Vaughan Submersible Chopper Pump mounted on a portable stand and fitted with high-velocity mixing nozzle. The Conditioning Pump recirculates the contents of the wet well, chopping and mixing to produce a homogeneous mixture that is more easily pumped out.

The Rotamix Process Mixing System by Vaughan uses state of the art solids handling equipment and technology to provide the best in hydraulic mixing systems for digesters, sludge storage tanks, sludge blend tanks, equalization basins and anoxic zones

Vaughan's self-priming centrifugal chopper pumps are available in 4" and 6" designs and are guaranteed non-clogging pumps...

Vaughan’s Turbo Mixer is a propeller mixer mounted vertically inside an 18” elbow. This mixer has replaced many submersible propeller mixers which have experienced motor or gearbox failure due to fluid inleakage. 

The Vaughan Company offers a series of portable bypass pump package options that can be used for tough solids reduction applications or low shear solids handling in temporary or permanent situations.

Vaughan Company with over 60 years of solids handling experience, introduces the TRITON Screw Centrifugal Pumps.  Combining the benefits of Vaughan’s superior pump designs with the advantages of high efficiency in a non-clog design.  The TRITON Screw Centrifugal impeller is ideal for handling thick sludges, large or stringy solids, shear sensitive fluids and delicate or highly abrasive materials.

The patented Foambuster uses the same glass-lined ductile iron nozzles as Rotamix but also uses a stainless steel splashplate located below the nozzle to deflect the nozzle discharge and create a broad spray of sludge, which wets and breaks up foam forming on the surface of the digester. Digester sludge is pumped through the Foambuster either by the Rotamix Chopper Pump or by a separate Chopper Pump. When the Foambuster is used in conjunction with a tank mixing system, which produces a rotational mixing pattern in the tank, only one spray nozzle will be required for effective foam control.

The patent pending Floor Washer System is the Foambuster nozzle/deflector, but with the deflector rotated from below the nozzle to above the nozzle. The inverted splashplate spreads nozzle flow out across a floor in a fairly wide path to wash settled grit, sand or debris into a sump where it can be pumped out by a dewatering chopper pump. The Floor Washer System is particularly useful for attacking deposition problems in Combined Sewer Overflow (CSO) tanks, storm collection tanks, equalization tanks, lift stations, and influent channels.

Vaughan's horizontal end centrifugal suction chopper pumps come in a "flushless" mechanical seal or a standard combined bearing frame flushed...


Vaughan Company has a long history of innovation and quality. Jim Vaughan, the founder of Vaughan Company, invented the world's first chopper pump in 1960. The business started in the garage of Jim's gas station in Elma, Washington. Jim repaired the local dairymen's manure pumps, which experienced constant maintenance problems caused by clogging on bedding and twine. After spending many a wasted hour repairing pumps, Jim developed a unique design that effectively became the original chopper pump. Immediately, Jim realized he had invented something worthy of a patent.  

  In 1961, Vaughan Company purchased a 5,000 square foot building located in Montesano, Washington, This facility was previously used by the Schafer Brothers Logging Company as an engine repair facility for the railroad. Vaughan Company's current facility still incorporates the original building, but with over 35,000 square feet of additional manufacturing space.

In 1964, Vaughan Company's first patent was issued. Since then, over 40 worldwide patents have been issued or are pending. New design developments have almost exclusively centered on product improvements in efficiency and reliability in the most severe environments.

Improvements in the late 1970's included the development of a seal-and-bearing system for vertical wet well pumps to eliminate sleeve and grease packed bearings. In the 1980's, Vaughan developed the "LCC Series" of higher efficiency 3" through 6" chopper pumps. These designs were further refined with the "HP Series" and also expanded to include 8" through 12" pumps in the 1990's. The "E-Series" chopper pumps were introduced in early 2000, and included further improvements in efficiency, and back pull-out design was introduced.


  Stepping into the 21st Century, Vaughan continues this pursuit of dependability using modern technology. In-house 3-dimensional computer solid modeling design allows Vaughan to create exacting fits and precision castings for all components. Computational Fluid Dynamics (CFD) analysis allows Vaughan to look closely at flow patterns and velocities within the pump, and develop premium efficiency design upgrades. Computer Numerically Controlled (CNC) automated machining creates exacting parts repetition and dependable fits with every pump.

Building a legend does take time. Dependably chopping and pumping heavy solids doesn't happen overnight. It takes years of product development and improvement, and years of proven field experience to earn the title of "Legend".

Click Here To Download Our Video Demonstrations:
Video: Vaughan Centrifugal Chopper Pump In Action
Video Demonstration: Vaughan Chopper Pump - Jeans
Video Demonstration: Vaughan Chopper Pump - Flannel Shirt
Video Demonstration: Vaughan Chopper Pump - Nylons
Video Demonstration: Vaughan Chopper Pump - Whole Turkey
Video Demonstration: Vaughan Chopper Pump — Food
Video Demonstration: Vaughan Chopper Pump — Wipes vs. Diapers
Small Tank Mixing Simulation, Part 1
Small Tank Mixing Simulation, Part 2

Click Here To Download:
Chopper Pumps Product Catalog
Brochure: Chopper Pumps
Brochure: Ro2Mix Process Mixing System
Rotamix Process Mixing System Brochure


Vaughan Company

364 Monte Elma Road

Montesano, WA 98563


Phone: 360-249-4042 x 728

Fax: 360-249-6155

Contact: Josh Neils


  • During 2017’s Hurricane Harvey, the wettest tropical storm on record in the United States, over 52 inches of rain fell in the Houston area. The Vaughan pumps ran continuously for 72 hours with no plugging incidents and no problems while pumping over 2.5 million gallons of unscreened sewage through the lift station. It never flooded and none of the 150 homes served by this lift station experienced sewer back-ups.

  • The main lift station serving the waste water treatment plant in Morgan’s Point, Texas, continually experienced problems with its three standard non-clog pumps. The pumps frequently clogged when rainfall totals reached or exceeded 2 inches. Shop rags, pieces of 2 x 4 lumber, plastic bottles, gloves, and wet wipes all commonly clogged the pumps when the standard demand increased. Pump removal, unplugging, and recurring repairs were required, but the service company was not always available for immediate assistance, causing problems for residents serviced by this lift station.

  • When the Otay River Pump Station had a floating blanket of grease problem, they turned to the Vaughan Chopper Pump to help eliminate it – while also being a cost-effective solution.

  • The Independence Hill Conservancy District's Taney Lift Station was having continuous problems with wipes, swiffers, and plastics deposited in the incoming lines, which then broke loose in storms and overwhelmed the old non-clog pumps.

  • Vaughan Co. provided a 50 HP, 1750-RPM model PE4P6CS-118 vertical pedestal chopper pump for the Carnelian Bay Pump Station to replace an existing pedestal pump, which was having difficulty with ragging.  

  • Replacing mechanical seals twice per year was difficult and expensive for Chester, IL, but a more serious problem occurred when the seals failed with the Mississippi River at flood stage and the sealed lift station underwater.

  • Fairfield-Suisun Sewer District (FSSD) in California installed a Vaughan Rotamix® hydraulic mixing system next to an identical anaerobic digester with a 7-year-old gas mixing system. Rotamix® installation was completed in Sept, 2010.

  • The use of Vaughan's self-priming chopper pump and nozzles upstream of the influent screens improves plant efficiency and greatly increases the amount of cogenerated electricity from digester gas.

  • Disposable, throw-away products are making raw sewage pumping tougher than ever. The Jefferson Street Pump Station at the City of Centralia, WA had a problem demanding a cost-effective solution.

  • This project provides an unusual "before-and-after" comparison of how a high-solids loaded digester system with a Rotamix mixing system performed before and after the Foambuster was installed.


  • Chopper pumps utilize a chopping action between the impeller and the suction plate to break down solids that pass through the pump into smaller pieces. Vaughan Company, an established pump manufacturer in Washington, U.S.A., designs and manufactures a line of centrifugal chopper pumps.

  • Vaughan Company introduces its line of Self Priming Chopper Pumps; ideally suited for lift stations, scum wells, portable cleanout, or any retrofits of clogging pumps.

  • Fairfield-Suisun Sewer District (FSSD) in California installed a Vaughan Rotamix® hydraulic mixing system next to an identical anaerobic digester with a 7-year-old gas mixing system. Rotamix® installation was completed in Sept, 2010.

  • The Vaughan Rotamix® mixing system for the blend tank at the Salmon Creek Wastewater Treatment Plant, Vancouver, WA, should have had plenty of mixing flow for stirring up the sludge considering the relatively small size of this tank. Rotamix® is a hydraulic jet mixing system with floor-mounted nozzles powered by a Vaughan Chopper Pump. By Vaughan Company

  • If you go looking for a particular sewage treatment plant in Cincinnati, Ohio, the first thing you'll notice is ... you might not notice it at all. In fact, when following perfectly clear directions to the facility, you might still drive right by it, dismissing it as just another office building. It doesn't register as a treatment plant.

  • The chopper pump is a centrifugal pump that utilizes a chopping action between the impeller and suction plate. These pumps were originally designed in the 1960s for use in the local dairy industry to transport manure to and from storage tanks.

  • Vaughan Co. provided a 50 HP, 1750-RPM model PE4P6CS-118 vertical pedestal chopper pump for the Carnelian Bay Pump Station to replace an existing pedestal pump, which was having difficulty with ragging.