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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.
Filters
- Ball Bearing (1)
- Bearing Cap (2)
- Bolt (1)
- Hex Capscrew (2)
- Hydraulic Adapter Bracket (2)
- Hydraulic Coupler (1)
- Impeller (4)
- Lock Nut (2)
- Mechanical Seal (1)
- Nut (1)
- Plug (2)
- Power Head (1)
- Powerhead (1)
- Rope Packing (1)
- Shaft Kit (8)
- Shaft Sleeve (1)
- Volute (2)
- Water Pump Grease (1)
- Water Pump Parts (27)
- Water Pump Seal Kit (2)
- Water Truck Pump (24)
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24 in stock
Retaining Ring, External, Black Phosphate, 1-1/8" Shaft 1-3/16, UnitedBuilt S23010MS
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$2.25$2.25 - $2.25Current price $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...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$2.25$2.25 - $2.25Current price $2.25| / -
10 in stock
Shaft Kit, Mechanical Seal, B3ZRMS CW LONG, Stressproof®, 1-1/8" x 1/4" Key, UnitedBuilt B80699MS-L
UnitedBuiltOriginal price $270.65Original price $270.65 - Original price $270.65Original price $270.65Current price $270.00$270.00 - $270.00Current price $270.00| /UnitedBuilt B80699MS-L Shaft Kit designed for ATP B3ZRMS-style aftermarket clockwise (CW) rope packing pumps with a long shaft. Some aftermarket B3...
View full detailsOriginal price $270.65Original price $270.65 - Original price $270.65Original price $270.65Current price $270.00$270.00 - $270.00Current price $270.00| /Save 0% Save % -
8 in stock
Hydraulic Spline Coupler (Coupling) 1-1/4" Spline 14 Tooth, M10176
UnitedBuilt ChoiceOriginal price $0.00 - Original price $0.00Original price $0.00$215.00$215.00 - $215.00Current price $215.00| /Original price $0.00 - Original price $0.00Original price $0.00$215.00$215.00 - $215.00Current price $215.00| / -
4 in stock
Nut Berkeley Packing Gland B3J, 1/2-13 Hex Nut Brass, UnitedBuilt S23347
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$3.39$3.39 - $3.39Current price $3.39| /Original price $0.00 - Original price $0.00Original price $0.00$3.39$3.39 - $3.39Current price $3.39| / -
1 in stock
Water Truck Pump B4ERBMS, 5" Suction x 4" Discharge Flanged, Counter Clockwise (CCW), Mechanical Seal, Berkeley B73027
BerkeleyOriginal price $13,237.00Original price $13,237.00 - Original price $13,237.00Original price $13,237.00Current price $7,628.00$7,628.00 - $7,628.00Current price $7,628.00| /Water Pump B4ERBMS, 5" Suction x 4" Discharge Flanged, Counter Clockwise (CCW), Mechanical Seal, Berkeley B73027
Original price $13,237.00Original price $13,237.00 - Original price $13,237.00Original price $13,237.00Current price $7,628.00$7,628.00 - $7,628.00Current price $7,628.00| /Save 42% Save % -
391 in stock
Countersunk Plug, Hex Socket, 1/8" MNPT, Vibra Seal, Brass (3153X2)
Mid-AmericaOriginal price $0.94 - Original price $0.94Original price$0.94$0.94 - $0.94Current price $0.94| /Countersunk Plug, Hex Socket, 1/8" MNPT, Vibra Seal, Brass Brass C360 Vibra Seal Threads
Original price $0.94 - Original price $0.94Original price$0.94$0.94 - $0.94Current price $0.94| / -
1236 in stock
Countersunk Plug, Hex Socket, 1/4" MNPT, Vibra Seal, Brass 3153X4
Mid-AmericaOriginal price $0.00 - Original price $0.00Original price $0.00$1.61$1.61 - $1.61Current price $1.61| /Countersunk Plug, Hex Socket, 1/4" MNPT, Vibra Seal, Brass Brass C360 Vibra Seal Threads
Original price $0.00 - Original price $0.00Original price $0.00$1.61$1.61 - $1.61Current price $1.61| / -
31 in stock
Shaft Key 1/4" x 2" Long, UnitedBuilt S24255MS
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$1.50$1.50 - $1.50Current price $1.50| /UnitedBuilt Shaft Key 1/4" X 2-1/8"
Original price $0.00 - Original price $0.00Original price $0.00$1.50$1.50 - $1.50Current price $1.50| / -
22 in stock
Ball Bearing, Double Row, 5306-C3, UnitedBuilt S13271MS
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$50.00$50.00 - $50.00Current price $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.
Original price $0.00 - Original price $0.00Original price $0.00$50.00$50.00 - $50.00Current price $50.00| / -
39 in stock
Lock Nut 7/8-9 RH, Stainless Steel, UnitedBuilt M10220
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$12.75$12.75 - $12.75Current price $12.75| /UnitedBuilt Impeller Lock Nut 7/8-9 RH, Stainless Steel CW (M3Z) 7/8-9 RH Stainless Steel Not sure if it fits? Call us at 602-253-7739 or send us...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$12.75$12.75 - $12.75Current price $12.75| / -
13 in stock
Lock Nut 7/8-9 LH, Stainless Steel (PUMPBU36-189SS)
UnitedBuiltOriginal price $43.88 - Original price $43.88Original price$43.88$43.88 - $43.88Current price $43.88| /UnitedBuilt Impeller Lock Nut 7/8-9 LH, Stainless Steel CCW (M3Z) 7/8-9 LH Stainless Steel Not sure if it fits? Call us at 602-253-7739 or send u...
View full detailsOriginal price $43.88 - Original price $43.88Original price$43.88$43.88 - $43.88Current price $43.88| / -
0 in stock. Available on backorder
Water Pump, Model B3JRMBHS, 4" Suction x 3" Discharge, Groove Ends 5" x 3", Clockwise (CW), Hydraulic Drive SAE C 4-Bolt 1-1/4" x 14T, 13.5" Impeller, Mechanical Seal, ATP B73403GR
ATPOriginal price $0.00 - Original price $0.00Original price $0.00$3,495.00$3,495.00 - $3,495.00Current price $3,495.00| /The Aftermarket ATP B3J-S Clockwise, Mechanical Seal pump is a high pressure, hydraulically driven, 4” x 3” (inlet is 4″ ID, 5″ OD) Grooved water p...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$3,495.00$3,495.00 - $3,495.00Current price $3,495.00| / -
7 in stock
Straight Water Vent Valve, Hoffman 79, 1/2" x 3/4" 401488
HoffmanOriginal price $0.00 - Original price $0.00Original price $0.00$264.00$264.00 - $264.00Current price $264.00| /Original price $0.00 - Original price $0.00Original price $0.00$264.00$264.00 - $264.00Current price $264.00| / -
0 in stock. Available on backorder
Packing Rings (Set of 6) 2-3/4ID x 1/2T 2-3 Berkeley S16448
BerkeleyOriginal price $929.00Original price $929.00 - Original price $929.00Original price $929.00Current price $605.00$605.00 - $605.00Current price $605.00| /Packing Rings (Set of 6) 2-3/4ID x 1/2T 2-3 Berkeley S16448
Original price $929.00Original price $929.00 - Original price $929.00Original price $929.00Current price $605.00$605.00 - $605.00Current price $605.00| /Save 35% Save % -
1 in stock
Impeller B4ERBMS CCW (B73027), 10-7/16 DIA CUT CI 1-1/4, Berkeley L06020
BerkeleyOriginal price $3,584.00Original price $3,584.00 - Original price $3,584.00Original price $3,584.00Current price $2,350.00$2,350.00 - $2,350.00Current price $2,350.00| /Impeller B4ERBMS CCW (B73027), 10-7/16 DIA CUT CI 1-1/4, Berkeley L06020
Original price $3,584.00Original price $3,584.00 - Original price $3,584.00Original price $3,584.00Current price $2,350.00$2,350.00 - $2,350.00Current price $2,350.00| /Save 34% Save % -
1 in stock
Impeller B3ZQM_ CW 7/8-9U 9FUL, Berkeley M04275
BerkeleyOriginal price $2,459.00Original price $2,459.00 - Original price $2,459.00Original price $2,459.00Current price $1,400.00$1,400.00 - $1,400.00Current price $1,400.00| /Original price $2,459.00Original price $2,459.00 - Original price $2,459.00Original price $2,459.00Current price $1,400.00$1,400.00 - $1,400.00Current price $1,400.00| /Save 43% Save % -
0 in stock. Available on backorder
Water Pump, Model B4JRMBH, 5" Suction x 4" Discharge Flanged, Clockwise (CW), Hydraulic Drive SAE C 4-Bolt 1-1/4" x 14T, 13.5" Impeller, Rope Packing Seal, Berkeley B85479
BerkeleyOriginal price $15,075.00Original price $15,075.00 - Original price $15,075.00Original price $15,075.00Current price $7,380.00$7,380.00 - $7,380.00Current price $7,380.00| /Water Pump, Model B4JRMBH, 5" Suction x 4" Discharge Flanged, Clockwise (CW), Hydraulic Drive SAE C 4-Bolt 1-1/4" x 14T, 13.5" Impeller, Rope Packi...
View full detailsOriginal price $15,075.00Original price $15,075.00 - Original price $15,075.00Original price $15,075.00Current price $7,380.00$7,380.00 - $7,380.00Current price $7,380.00| /Save 51% Save % -
0 in stock. Available on backorder
Water Truck Pump, Mechanical Seal, Clockwise (CW), 4x3 Flanged Volute, Potable NSF/ANSI 61, 316 Stainless Steel Volute, Impeller and Adapter, ATP 101-XA80-26
ATPOriginal price $0.00 - Original price $0.00Original price $0.00$7,750.00$7,750.00 - $7,750.00Current price $7,750.00| /Clockwise Keyed Flanged Stainless Steel 4″ x 3″ Mech Seal Pump. Potable Stainless Steel 316 for volute, impeller and adaptor. Cast iron frame. 316...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$7,750.00$7,750.00 - $7,750.00Current price $7,750.00| / -
10 in stock
Shaft Kit, Rope Packing, B3ZRM CW LONG, Stressproof® Steel, 1-1/8" x 1/4" Key, UnitedBuilt B80698MS-L
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$265.00$265.00 - $265.00Current price $265.00| /UnitedBuilt B80698MS-L Shaft Kit designed for ATP B3ZRM-style aftermarket clockwise (CW) rope packing pumps with a long shaft. Some aftermarket B3Z...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$265.00$265.00 - $265.00Current price $265.00| / -
1 in stock
Water Truck Pump, Counter-Clockwise (CCW), 4" NPT Suction x 3" NPT Discharge, Rope Packing Seal, Cast Iron, 9" Impeller, B3ZRM, Berkeley B80303
BerkeleyOriginal price $7,078.00Original price $7,078.00 - Original price $7,078.00Original price $7,078.00Current price $3,540.00$3,540.00 - $3,540.00Current price $3,540.00| /Water Truck Pump, Counter-Clockwise (CCW), Rope Packing Seal, Cast Iron, 9" Impeller, B3ZRM, Berkeley B80303
Original price $7,078.00Original price $7,078.00 - Original price $7,078.00Original price $7,078.00Current price $3,540.00$3,540.00 - $3,540.00Current price $3,540.00| /Save 50% Save % -
0 in stock. Available on backorder
Water Truck Pump, Model B4JRMBH, 5" Suction x 4" Discharge Flanged, Counter-Clockwise (CCW), 13.5" Impeller, Rope Packing Seal, Berkeley B62323
BerkeleyOriginal price $14,908.00Original price $14,908.00 - Original price $14,908.00Original price $14,908.00Current price $7,300.00$7,300.00 - $7,300.00Current price $7,300.00| /Water Truck Pump, Model B4JRMBH, 5" Suction x 4" Discharge Flanged, Counter-Clockwise (CCW), 13.5" Impeller, Rope Packing Seal, Berkeley B62323
Original price $14,908.00Original price $14,908.00 - Original price $14,908.00Original price $14,908.00Current price $7,300.00$7,300.00 - $7,300.00Current price $7,300.00| /Save 51% Save % -
1 in stock
Water Truck Pump, Model B4JRMBH, 5" Suction x 4" Discharge Flanged, Clockwise (CW), Keyed Shaft, 13.5" Impeller, Rope Packing Seal, Berkeley B62321
BerkeleyOriginal price $14,908.00Original price $14,908.00 - Original price $14,908.00Original price $14,908.00Current price $7,304.00$7,304.00 - $7,304.00Current price $7,304.00| /Water Truck Pump, Model B4JRMBH, 5" Suction x 4" Discharge Flanged, Clockwise (CW), Keyed Shaft, 13.5" Impeller, Rope Packing Seal, Berkeley B62321
Original price $14,908.00Original price $14,908.00 - Original price $14,908.00Original price $14,908.00Current price $7,304.00$7,304.00 - $7,304.00Current price $7,304.00| /Save 51% Save % -
5 in stock
Hex Head Capscrew 3/8-16 X 3/4, Berkeley S26824
BerkeleyOriginal price $11.79Original price $11.79 - Original price $11.79Original price $11.79Current price $7.00$7.00 - $7.00Current price $7.00| /Original price $11.79Original price $11.79 - Original price $11.79Original price $11.79Current price $7.00$7.00 - $7.00Current price $7.00| /Save 41% Save % -
Typically Ships in 2-3 Days if Not In Stock | 0 in stock. Available on backorder
Water Truck Pump B3ZRM, 4" Suction x 3" Discharge FNPT, 9" Impeller, Clockwise (CW), Rope Packing Seal, Hydraulic Motor Direct Coupling Drive, Berkeley B80357
BerkeleyOriginal price $7,155.00Original price $7,155.00 - Original price $7,155.00Original price $7,155.00Current price $3,720.00$3,720.00 - $3,720.00Current price $3,720.00| /Berkeley B3ZRM model cast iron water truck pump with rope packing seal. Hydraulic Motor Direct Coupling Drive, 4" Suction x 3" Discharge FNPT with ...
View full detailsOriginal price $7,155.00Original price $7,155.00 - Original price $7,155.00Original price $7,155.00Current price $3,720.00$3,720.00 - $3,720.00Current price $3,720.00| /Save 48% Save %