S-6 PUMP
6-Inch Self-Priming Pump for Wastewater and Slurries
The S-6 is built for demanding liquid-handling applications where above-grade installation, reliable self-priming, and straightforward service access are important.
Its large-volume design supports automatic repriming in a completely open system without requiring suction or discharge check valves.
S-6 Pump Summary
The S-6 uses a two-vane, semi-open impeller designed for solids-laden liquids and slurries.
Its 6-inch design is intended to pass spherical solids up to 3 inches in diameter through critical areas, including the circulation port.
Pump-out vanes on the impeller shroud help reduce foreign-material buildup behind the impeller and reduce pressure on the seal and bearings, supporting reliable operation and easier maintenance.
S-6: Designed for Easier Maintenance
The S-6 is designed to make routine service and wear-component access more straightforward without unnecessary pump disassembly.

- Two-vane, semi-open design
- Designed to pass spherical solids up to 3 inches
- Pump-out vanes help reduce foreign-material buildup behind the impeller
- Helps reduce pressure on the seal and bearings

- Double-floating, self-aligning, oil-lubricated mechanical cartridge seal
- Stationary and rotating faces are tungsten titanium carbide
- Designed for abrasive and/or trash-handling applications

- Can be removed without disturbing the pump volute or piping
- Pusher bolts provide assistance with removal
- Spare rotating assembly can be installed to reduce downtime

- Atmospheric barrier with 2 lip seals
- Provides additional bearing protection
- Allows external seal monitoring

- Wear plate is accessible by removing the back cover assembly
- Hand nuts allow the back cover and assembled wear plate to be removed from the pump casing
- Wear plate can be inspected and replaced if badly scored or worn
- Back cover O-ring can be inspected and replaced if damaged or worn
S-6 Technical Specifications
| Model | S-6 |
| Series | S Series |
| Connection Size | 6 inches |
| Pump Type | Self-priming, solids-handling |
| Impeller | Two-vane, semi-open solids-handling impeller |
| Solids Handling | Up to 3-inch spherical solids |
| Mechanical Seal | Double-floating, self-aligning, oil-lubricated cartridge seal |
| Seal Faces | Tungsten titanium carbide |
| Flange Connections | 150 lb. ANSI |
| Bearing Protection | Atmospheric barrier with two lip seals; external seal monitoring |
| Service Access | Primary wear parts accessible through removable clean-out cover |

S-6 Downloads
Self-priming, solids handling
Available: S-2 Classic-T spec & S-12 10-Series spec
All other models replaced by the XS Series
Contact All Prime for Orders
Applications
The S-6 is suited to demanding applications including:
- Wastewater and Municipal Systems
- Industrial and Process Applications
- Mining and Aggregate
- Food and Beverage
- Energy and Manufacturing
- Paper Mills
- Steel Mills
- Solids-Laden Liquids and Slurries
Parts and Service
All Prime supports the S-6 with replacement wear components and rotating-assembly service parts. Primary service items include the impeller, mechanical seal, wear plate, and related rotating-assembly components.
Contact All Prime for help identifying the correct replacement parts for an existing S-6.
Select the Right Pump Configuration
Pump selection should be based on the actual operating conditions of the application. Helpful information includes:
- Required flow
- Total dynamic head
- Fluid being pumped
- Solids size and concentration
- Suction conditions
- Available power
- Existing pump information when replacing equipment

Explore the S Series
The S-6 is part of the All Prime S Series of self-priming, solids-handling pumps. Explore the full series to compare available pump sizes and select the model that best fits the application.


