Model 840 Reversing Grinder Pump

Product Details

The Zoeller Model 840 Shark® grinder pump is purpose‑built for the toughest residential and light commercial wastewater applications, where high solids content, stringy materials, and long pressure sewer runs demand superior grinding performance. Unlike standard grinder pumps, the Model 840 features true auto‑reversing cutter technology, automatically alternating rotation direction with every pump cycle. This innovative design actively pulls stringy debris away from the cutter, dramatically reducing roping, binding, and downtime while extending cutter life.

Powered by a 2 HP oil‑filled motor, the Model 840 delivers the torque required to grind and pump difficult materials such as wipes, rags, and sanitary products through 1‑1/4″ pressure piping. With the ability to reach 104 feet of head and 45 GPM. The oil‑filled motor design ensures excellent thermal management, allowing the pump to operate cooler during extended run times. Heavy‑duty cast‑iron motor and pump housings, combined with a corrosion‑resistant powder‑coated epoxy finish, provide exceptional durability in aggressive wastewater environments.

The grinder assembly incorporates a hardened stainless‑steel cutter system and dual ball bearings, supported by dual mechanical shaft seals for enhanced protection against moisture intrusion. Stainless‑steel hardware and a stainless‑steel motor shaft further reinforce the pump’s long‑term reliability. The Model 840 is designed as a nonautomatic grinder pump, intended for integration with external simplex or duplex grinder control panels that manage both pump operation and reversing logic.

Every Model 840 grinder pump is 100% factory tested prior to shipment to verify cutting performance, hydraulic output, and electrical integrity. Backed by Zoeller’s Shark® grinder technology and an 18‑month limited warranty, the Model 840 stands as the industry’s go‑to solution for severe grinder pump applications where reliability and clog resistance are critical.

Features and Benefits

• Oil-filled motor and cast iron motor housing for optimal heat dissipation which prevents the pump from overheating
• Nonautomatic grinder pump designed for use with external grinder control panels. Auto‑reversing functionality is controlled through the panel logic
• The cutter assembly automatically alternates between clockwise and counterclockwise rotation on each cycle, pulling stringy materials away from the cutter and significantly reducing clogging and roping issues
• Features a hardened stainless‑steel cutter and cutting plate designed to aggressively reduce solids commonly found in modern wastewater streams
• Designed to discharge through 1‑1/4" pressure piping, making it ideal for pressure sewer systems and long discharge runs
• Powder‑coated epoxy finish protects all cast‑iron components, delivering corrosion resistance in aggressive wastewater environments
• Includes stainless‑steel motor shaft, stainless‑steel hardware, dual ball bearings, and heavy‑duty mechanical seals for extended service life
• 100% Factory Tested - every pump is submerged in water and tested at the factory to ensure that it performs as expected when you receive it
• Comes with a 1-year limited warranty giving you protection over your investment and the peace of mind you expect in a quality product

Product Specifications