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Quality Water Truck Systems, Tanks & Parts Since 1947
Quality Water Truck Systems, Tanks & Parts Since 1947

Water Pumps & Parts

UnitedBuilt offers a complete selection of water truck pumps and pump replacement parts, including our own line of 4x3 cast iron centrifugal pumps designed for demanding dust suppression and fluid transfer applications. Engineered for durability and performance, our pumps are manufactured in the USA using domestic and global high-quality materials and built to strict quality standards.

Our UnitedBuilt pumps are available in both mechanical seal (M3ZRMS) and rope packing seal (M3ZRM) configurations, providing flexibility based on your maintenance preferences and operating conditions. Each model is designed as a direct replacement for Berkeley B3ZRM and B3ZRMS water truck pumps, ensuring easy integration and reliable performance.

In addition to complete pumps, we stock a full range of pump repair parts and components, including impellers, mechanical seals, packing kits, shaft kits, volutes, and related hardware. Whether you’re rebuilding a pump or replacing a single component, these parts are selected for reliability and compatibility in real-world applications.

We also stock and distribute genuine OEM water truck pumps from Berkeley and Franklin Electric, along with supporting components to keep your system operating efficiently.

We work to keep our most in-demand pumps and parts readily available and offer fast shipping to help minimize downtime and keep your equipment running. Whether you need a complete pump or replacement parts, you’ll find dependable solutions built for the job.

Water Pumps & Parts - UnitedBuilt Equipment

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  • Volute, Cast Iron, 4x3, Counter Clockwise (CCW), Grooved Ends, UnitedBuilt M3Z H04041MS - UnitedBuilt Equipment
    26 in stock

    Volute, Cast Iron, 4x3, Counter Clockwise (CCW), Grooved Ends, UnitedBuilt M3Z H04041MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $350.00
    $350.00 - $350.00
    $350.00

    UnitedBuilt Volute CCW Groove (M3Z) Manufactured in the USA of Domestic and Imported Materials. ASTM126 30B heavy-duty cast gray iron Not sure i...

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    $0.00 - $0.00
    $0.00
    $350.00
    $350.00 - $350.00
    $350.00
  • Shaft Sleeve, Stainless Steel, M3ZRM(S) UnitedBuilt S39242MS - UnitedBuilt Equipment
    21 in stock

    Shaft Sleeve, Stainless Steel, M3ZRM(S) UnitedBuilt S39242MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $71.50
    $71.50 - $71.50
    $71.50

    UnitedBuilt Shaft Sleeve, Stainless Steel for B3Z & B4Z pumps. Not sure if it fits? Call us at 602-253-7739 or send us a message in our chat. N...

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    $0.00 - $0.00
    $0.00
    $71.50
    $71.50 - $71.50
    $71.50
  • Hydraulic Adapter Bracket SAEB for B3ZRM(S) Pumps, Cast Iron, Berkeley B07779 Bracket Only - UnitedBuilt Equipment
    Hydraulic Adapter Bracket SAEB for B3ZRM(S) Pumps, Cast Iron, Berkeley B07779 Bracket Only - UnitedBuilt Equipment
    15 in stock

    Hydraulic Adapter Bracket SAEB for B3ZRM(S) Pumps, Cast Iron, Berkeley B07779 Bracket Only

    Berkeley
    $0.00 - $0.00
    $0.00
    $268.00
    $268.00 - $268.00
    $268.00

    Hydraulic Adapter Bracket SAEB for B3ZRM(S) Pumps, Cast Iron, Berkeley B07779 Bracket Only

    $0.00 - $0.00
    $0.00
    $268.00
    $268.00 - $268.00
    $268.00
  • Rubber, Clack B4T_K 15-1/16LG Neoprene 6, Berkeley L04119 - UnitedBuilt Equipment
    Save 37% Save %
    3 in stock

    Rubber, Clack B4T_K 15-1/16LG Neoprene 6, Berkeley L04119

    Berkeley
    $182.00
    $182.00 - $182.00
    $182.00
    $115.00
    $115.00 - $115.00
    $115.00

    Berkeley Pump L04119 Repair Part for Centrifugal Irrigation & Industrial Pumps, RUBBER,CLACK B4T_K 15-1/16LG N

    $182.00
    $182.00 - $182.00
    $182.00
    $115.00
    $115.00 - $115.00
    $115.00
    Save 37% Save %
  • Impeller, Cast Iron, Clockwise (CW), UnitedBuilt M3Z M02153MS - UnitedBuilt Equipment
    Impeller, Cast Iron, Clockwise (CW), UnitedBuilt M3Z M02153MS - UnitedBuilt Equipment
    2 in stock

    Impeller, Cast Iron, Clockwise (CW), UnitedBuilt M3Z M02153MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $295.00
    $295.00 - $295.00
    $295.00

    UnitedBuilt threaded Clock Wise (CW) cast iron impeller for M3Z pumps (or Berkeley B3Z) style pumps.

    $0.00 - $0.00
    $0.00
    $295.00
    $295.00 - $295.00
    $295.00
  • Shaft Kit Rope Packing CW UnitedBuilt B80698MS - UnitedBuilt Equipment
    Shaft Kit Rope Packing CW UnitedBuilt B80698MS - UnitedBuilt Equipment
    24 in stock

    Shaft Kit, Rope Packing, B3ZRM CW, Stressproof® Steel, 1-1/8" x 1/4" Key, UnitedBuilt B80698MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $265.00
    $265.00 - $265.00
    $265.00

    UnitedBuilt B80698MS Shaft Kit for M3ZRM CW rope packing pump. Manufactured in the USA of original Niagara LaSalle’s patented Stressproof® steel an...

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    $0.00 - $0.00
    $0.00
    $265.00
    $265.00 - $265.00
    $265.00
  • Ball Bearing Single Row UnitedBuilt S13270MS - UnitedBuilt Equipment
    Ball Bearing Single Row UnitedBuilt S13270MS - UnitedBuilt Equipment
    21 in stock

    Ball Bearing, Single Row, 6206-C3, UnitedBuilt S13270MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $26.99
    $26.99 - $26.99
    $26.99

    UnitedBuilt Ball Bearing Single Row, Inboard (M3Z) Not sure if it fits? Call us at 602-253-7739 or send us a message in our chat.  

    $0.00 - $0.00
    $0.00
    $26.99
    $26.99 - $26.99
    $26.99
  • Volute, Cast Iron, 4x3, Clockwise (CW), Grooved Ends, UnitedBuilt M3Z H04040MS - UnitedBuilt Equipment
    37 in stock

    Volute, Cast Iron, 4x3, Clockwise (CW), Grooved Ends, UnitedBuilt M3Z H04040MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $350.00
    $350.00 - $350.00
    $350.00

    UnitedBuilt Volute CW Groove (M3Z) Manufactured in the USA of Domestic and Imported Materials ASTM126 30B heavy-duty cast gray iron Not sure if ...

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    $0.00 - $0.00
    $0.00
    $350.00
    $350.00 - $350.00
    $350.00
  • Thrust Ring 1 - 3/16 ID 1 - 9/16 OD, UnitedBuilt S29218MS - UnitedBuilt Equipment
    19 in stock

    Thrust Ring 1-3/16 ID 1-9/16 OD, UnitedBuilt S29218MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $45.40
    $45.40 - $45.40
    $45.40

    UnitedBuilt Shaft Thrust Ring (B3Z) 1-3/16" ID 1-9/16" OD Not sure if it fits? Call us at 602-253-7739 or send us a message in our chat.  

    $0.00 - $0.00
    $0.00
    $45.40
    $45.40 - $45.40
    $45.40
  • Impeller, Clockwise (CW) for Self - Priming B4ZRKS, Aftermarket M08095 - UnitedBuilt Equipment
    Impeller, Clockwise (CW) for Self - Priming B4ZRKS, Aftermarket M08095 - UnitedBuilt Equipment
    2 in stock

    Impeller, Clockwise (CW) for Self-Priming B4ZRKS, Aftermarket M08095

    ATP
    $0.00 - $0.00
    $0.00
    $474.95
    $474.95 - $474.95
    $474.95

    Cast iron impeller for Berkeley B4ZRKS self-priming water truck pump. Clockwise rotation made of cast iron, aftermarket Berkeley M08095.

    $0.00 - $0.00
    $0.00
    $474.95
    $474.95 - $474.95
    $474.95
  • Shaft Kit, Mechanical Seal, CW, UnitedBuilt B80699MS - UnitedBuilt Equipment
    Shaft Kit, Mechanical Seal, CW, UnitedBuilt B80699MS - UnitedBuilt Equipment
    24 in stock

    Shaft Kit, Mechanical Seal, CW, UnitedBuilt B80699MS

    UnitedBuilt
    $268.30 - $268.30
    $268.30
    $268.30
    $268.30 - $268.30
    $268.30

    UnitedBuilt B80699MS Shaft Kit for M3ZRMS CW mechanical seal pump. Manufactured in the USA of high-quality materials with precision machining. Dir...

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    $268.30 - $268.30
    $268.30
    $268.30
    $268.30 - $268.30
    $268.30
  • Water Pump, CW Self Priming, Mechanical Seal, 4x4 FNPT, Hydraulic Drive, B4ZRKS, Aftermarket B69876 - UnitedBuilt Equipment
    3 in stock

    Water Pump, CW Self Priming, Mechanical Seal, 4x4 FNPT, Hydraulic Drive, B4ZRKS, ATP B69876

    ATP
    $0.00 - $0.00
    $0.00
    $2,995.00
    $2,995.00 - $2,995.00
    $2,995.00

    Water Pump, Self-Priming 4x4, Mechanical Seal, B4ZRKS, Aftermarket Shop repair parts 

    $0.00 - $0.00
    $0.00
    $2,995.00
    $2,995.00 - $2,995.00
    $2,995.00
  • Retaining Ring, External, Black Phosphate, 1-1/8" Shaft 1-3/16 (PUMPBS23010) - UnitedBuilt Equipment
    21 in stock

    Retaining Ring, External, Black Phosphate, 1-1/8" Shaft 1-3/16, UnitedBuilt S23010MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $2.25
    $2.25 - $2.25
    $2.25

    Retaining Ring, External, Steel 1-3/16" Shaft, Rotor Clip  SH-118 External Rings fit into the groove of a shaft. The portion of the ring that protr...

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    $0.00 - $0.00
    $0.00
    $2.25
    $2.25 - $2.25
    $2.25
  • Water Pump B3ZRMS, 4" Suction x 3" Discharge FNPT, Clockwise (CW), Mechanical Seal, Hydraulic Drive SAE C 4 - Bolt, 1 - 1/4" x 14T Splined Shaft, Berkeley B69875 - UnitedBuilt Equipment
    Water Pump B3ZRMS, 4" Suction x 3" Discharge FNPT, Clockwise (CW), Mechanical Seal, Hydraulic Drive SAE C 4 - Bolt, 1 - 1/4" x 14T Splined Shaft, Berkeley B69875 - UnitedBuilt Equipment
    Save 47% Save %
    2 in stock

    Water Pump B3ZRMS, 4" Suction x 3" Discharge FNPT, Clockwise (CW), Mechanical Seal, Hydraulic Drive SAE C 4-Bolt, 1-1/4" x 14T Splined Shaft, Berkeley B69875

    Berkeley
    $5,387.00
    $5,387.00 - $5,387.00
    $5,387.00
    $2,875.00
    $2,875.00 - $2,875.00
    $2,875.00

    The Berkeley OEM B69875 Water Truck Pump (Model B3ZRMS) is a high-performance, frame-mounted centrifugal pump designed for reliable water transfer ...

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    $5,387.00
    $5,387.00 - $5,387.00
    $5,387.00
    $2,875.00
    $2,875.00 - $2,875.00
    $2,875.00
    Save 47% Save %
  • Weight Clack B4_K 7/16" Id, Berkeley S14842 - UnitedBuilt Equipment
    Save 41% Save %
    0 in stock. Available on backorder

    Weight Clack B4_K 7/16" Id, Berkeley S14842

    Berkeley
    $153.00
    $153.00 - $153.00
    $153.00
    $90.00
    $90.00 - $90.00
    $90.00

    $153.00
    $153.00 - $153.00
    $153.00
    $90.00
    $90.00 - $90.00
    $90.00
    Save 41% Save %
  • Weight Clack 7/16" ID x 4-1/8" OD, Berkeley S15325 - UnitedBuilt Equipment
    Save 38% Save %
    0 in stock. Available on backorder

    Weight Clack 7/16" ID x 4-1/8" OD, Berkeley S15325

    Berkeley
    $56.00
    $56.00 - $56.00
    $56.00
    $35.00
    $35.00 - $35.00
    $35.00

    Weight Clack 7/16" ID x 4-1/8" OD, Berkeley S15325

    $56.00
    $56.00 - $56.00
    $56.00
    $35.00
    $35.00 - $35.00
    $35.00
    Save 38% Save %
  • Water Truck Pump, Cast Iron, 4x3 Counter-Clockwise (CCW), Mechanical Seal, Groove Volute, Franklin XS439 - UnitedBuilt Equipment
    Water Truck Pump, Cast Iron, 4x3 Counter-Clockwise (CCW), Mechanical Seal, Groove Volute, Franklin XS439 - UnitedBuilt Equipment
    Save 60% Save %
    1 in stock

    Water Truck Pump, Cast Iron, 4x3 Counter-Clockwise (CCW), Mechanical Seal, Groove Volute, Franklin XS439

    Franklin
    $7,154.00
    $7,154.00 - $7,154.00
    $7,154.00
    $2,885.00
    $2,885.00 - $2,885.00
    $2,885.00

    Franklin XS Series Heavy Duty Water Truck Pump Designed for Longevity: Using the latest design technology producing maximum bearing life. Rigidly-...

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    $7,154.00
    $7,154.00 - $7,154.00
    $7,154.00
    $2,885.00
    $2,885.00 - $2,885.00
    $2,885.00
    Save 60% Save %
  • Ball Bearing 1.18ID X 2.8 UnitedBuilt S13271MS - UnitedBuilt Equipment
    Ball Bearing 1.18ID X 2.8 UnitedBuilt S13271MS - UnitedBuilt Equipment
    19 in stock

    Ball Bearing, Double Row, 5306-C3, UnitedBuilt S13271MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $50.00
    $50.00 - $50.00
    $50.00

    Ball Bearing Double Row, Outboard (M3Z) Not sure if it fits? Call us at 602-253-7739 or send us a message in our chat.  

    $0.00 - $0.00
    $0.00
    $50.00
    $50.00 - $50.00
    $50.00
  • Case Gasket FTT, Franklin 305454042 - UnitedBuilt Equipment
    Case Gasket FTT, Franklin 305454042 - UnitedBuilt Equipment
    Save 23% Save %
    4 in stock

    Case Gasket FTT, Franklin 305454042

    Franklin
    $43.77
    $43.77 - $43.77
    $43.77
    $33.50
    $33.50 - $33.50
    $33.50

    $43.77
    $43.77 - $43.77
    $43.77
    $33.50
    $33.50 - $33.50
    $33.50
    Save 23% Save %
  • Shaft Kit Mechseal B4ZRKS CW UnitedBuilt B80703MS - UnitedBuilt Equipment
    Shaft Kit Mechseal B4ZRKS CW UnitedBuilt B80703MS - UnitedBuilt Equipment
    10 in stock

    Shaft Kit, Mechanical Seal, B4ZRKS, CW, Stressproof®, 1-1/8" x 1/4" Key, UnitedBuilt B80703MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $300.00
    $300.00 - $300.00
    $300.00

    Shaft Kit Mechseal B4ZRKS CW UnitedBuilt B80703MS

    $0.00 - $0.00
    $0.00
    $300.00
    $300.00 - $300.00
    $300.00
  • Bearing Cap M3ZRM(S) CW & CCW UnitedBuilt S19914MS - UnitedBuilt Equipment
    Bearing Cap M3ZRM(S) CW & CCW UnitedBuilt S19914MS - UnitedBuilt Equipment
    6 in stock

    Bearing Cap M3ZRM(S) CW & CCW, Cast Iron, UnitedBuilt S19914MS

    UnitedBuilt
    $0.00 - $0.00
    $0.00
    $109.50
    $109.50 - $109.50
    $109.50

    UnitedBuilt Outer Bearing Cap (B3Z) Keeps grease on your bearings and dirt and debris out. When rebuilding a pump, check that this component is in ...

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    $0.00 - $0.00
    $0.00
    $109.50
    $109.50 - $109.50
    $109.50
  • Mystik® JT - 6® High Temp #2 Grease 14oz Tube - UnitedBuilt Equipment
    23 in stock

    Mystik® JT-6® High Temp #2 Grease 14oz Tube

    Mystik
    $0.00 - $0.00
    $0.00
    $7.50
    $7.50 - $7.50
    $7.50

    Mystik JT-6 High Temp Grease #2 is a high-temperature, lithium-complex grease that combines excellent multi-purpose properties with a high dropping...

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    $0.00 - $0.00
    $0.00
    $7.50
    $7.50 - $7.50
    $7.50
  • Water Truck Pump, Counter - Clockwise (CCW), Rope Packing Seal, 4x3 Threaded FNPT, B3ZRM B3Z - HD, 1 - 1/2" Shaft x 3/8" Key, ATP B85874 - UnitedBuilt Equipment
    Water Truck Pump, Counter - Clockwise (CCW), Rope Packing Seal, 4x3 Threaded FNPT, B3ZRM B3Z - HD, 1 - 1/2" Shaft x 3/8" Key, ATP B85874 - UnitedBuilt Equipment
    5 in stock

    Water Truck Pump, Counter-Clockwise (CCW), Rope Packing Seal, 4x3 Threaded FNPT, B3ZRM B3Z-HD, 1-1/2" Shaft x 3/8" Key, ATP B85874

    ATP
    $0.00 - $0.00
    $0.00
    $1,595.00
    $1,595.00 - $1,595.00
    $1,595.00

    ATP B85874 Water Truck Pump – 4x3 CCW, Rope Seal, Threaded, PTO Driven (Aftermarket Replacement for Berkeley B3ZRM) The ATP B85874 is a heavy-duty ...

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    $0.00 - $0.00
    $0.00
    $1,595.00
    $1,595.00 - $1,595.00
    $1,595.00
  • Mechanical Seal, 1-3/4 Type 21, Short BF1C1, Berkeley S32015 - UnitedBuilt Equipment
    Save 45% Save %
    2 in stock

    Mechanical Seal, 1-3/4 Type 21, Short BF1C1, Berkeley S32015

    Berkeley
    $772.00
    $772.00 - $772.00
    $772.00
    $425.00
    $425.00 - $425.00
    $425.00

    Mechanical Seal, 1-3/4 Type 21, Short BF1C1, Berkeley S32015

    $772.00
    $772.00 - $772.00
    $772.00
    $425.00
    $425.00 - $425.00
    $425.00
    Save 45% Save %