The Berkeley B69876 B4ZRKS is a genuine Berkeley OEM 4x4 self-priming centrifugal pump built for demanding water-truck and dust-control applications. Its cast-iron case and impeller, heavy-duty frame-mounted design, clockwise hydraulic-drive configuration and mechanical shaft seal support dependable high-volume water transfer and spray-system operation.
A 4-inch female NPT suction feeds the pump, while the discharge is supplied with a removable 3-inch female NPT companion flange. The companion flange can be removed and replaced with another compatible 3-inch Class 125 flange, including a slip-on raised-face weld flange, to match the plumbing installation.
The self-priming design incorporates an internal flapper-style check valve that helps retain water in the pump case and supports automatic repriming after the initial fill. The genuine Berkeley B69876 configuration preserves the specified B4ZRKS component fit and service compatibility.
Key Features
| Feature |
Configuration |
| Manufacturer |
Berkeley by Pentair |
| Model |
B4ZRKS |
| Manufacturer Part Number |
B69876 |
| Pump Type |
Single-stage self-priming centrifugal pump |
| Nominal Pump Size |
4 x 4 x 9 |
| Drive Configuration |
Hydraulic, clockwise rotation |
Connections and Construction
| Specification |
Detail |
| Suction Connection |
4-inch female NPT |
| Pump Discharge |
3-inch Class 125 ANSI flange |
| Supplied Discharge Adapter |
Removable 3-inch female NPT companion flange |
| Alternate Discharge Connection |
Accepts a compatible 3-inch Class 125 companion flange |
| Shaft Seal |
Mechanical seal |
| Impeller |
Cast iron, 9.12 x 1.00 inches |
| Frame |
Heavy-duty Z-series bearing frame |
| Internal Check Valve |
Flapper-style check valve |
Documented Performance Reference
| Pump Speed |
Flow |
Total Dynamic Head |
NPSH Required |
| 2,000 RPM |
450 GPM |
95 ft |
8 ft |
| 2,000 RPM |
550 GPM |
85 ft |
9 ft |
Performance depends on pump speed, hydraulic-motor selection, available hydraulic flow and pressure, suction conditions and total system resistance. Size the hydraulic drive using the required pump RPM, brake horsepower and torque from the applicable Berkeley performance curve.
Applications
| Application |
Use |
| Water Trucks |
Tank filling, water transfer and spray-system supply |
| Dust-Control Equipment |
Supplying water to spray bars, spray heads and monitors |
| Construction and Mining |
High-volume clean-water handling |
| Municipal Equipment |
Road-maintenance and dust-suppression systems |
| Industrial Water Transfer |
Self-priming transfer from tanks or approved water sources |
Before Ordering or Installing
| Check |
Requirement |
| Pump Identity |
Confirm Berkeley B69876 and model B4ZRKS on the pump nameplate |
| Connections |
Confirm 4-inch female NPT suction and the required 3-inch Class 125 discharge companion flange |
| Rotation |
Confirm clockwise rotation from the pump-drive end |
| Hydraulic Motor |
Match the motor to available hydraulic flow and pressure and the required pump speed and torque |
| Hydraulic Interface |
Berkeley specifies an SAE J744C mounting flange with a Size B, 13-tooth, 16/32-pitch spline |
| Suction Conditions |
Available NPSH must exceed the pump's required NPSH |
| Piping |
Independently support and naturally align piping to prevent strain on the pump case |
| Initial Priming |
Fill the pump case completely with water before the first startup |
| Dry Operation |
Never operate the pump dry |
