Duplex Water Pressure Booster Pumps
Great for multi-family buildings, condos, schools, hospitals, office buildings, hotels, and more
Low Water Pressure Solutions from Homes to Hotels
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Duplex Water Booster Pump Designs for Every Situation
Our Duplex Booster Pump Systems are equipped with centrifugal pumps, regulated by variable frequency drives that control the pumps to maintain constant pressure regardless of varying demand or fluctuating incoming pressure. Duplex booster pump systems are designed to lead, lag, and alternate every 24 hours of run time. This ensures even wear between each pump. In the event one pump cannot maintain the pressure, the second pump will turn on to assist.
The models below are a small sample of our available systems. Please call or email for more available options, or provide us with the performances you need. Custom design options are also available.
Options available: NEMA 4X, BACnet modules, Modbus TCP/IP Modules, EtherNet/IP Modules, and more.
When you call us, you talk to a live person – someone who understands your challenges. We’ve gotten our hands dirty, we know what you need when you get into a mechanical room.
We collaborate with mechanical contractors, engineers, architects, as well as facility owners to trouble shoot problems and find solutions, sometimes right over the phone that day.
We evaluate your situation and supply submittals and pricing on all our water booster pumps, typically within 48 hours and 8 out of 10 systems are built, programmed, tested and shipped within 1 week!
- UL508 Rated VFDs
- Modular Frame for Ease of Transport & Installation
- Lead, Lag, and Alternate as needed
- PLC is not required for networked Yaskawa VFD's Energy Efficient Operation
- Plug-and-Play Installation
- Pre-wired & Factory Tested
- Properly sized pneumatic tank included
Standard Duplex Booster System
COMPACT DUPLEX Booster System
Wall Series Booster System
Duplex Variable-Speed Booster System with Storage Tank
3 Year Warrantry
Standard Duplex Booster System
- TW2018T-2T-3K 2in.pdf
- TW2018T-2T-4K 2in.pdf
- TW2018T-2T-5K 2in.pdf
- TW2018T-2T-6K 2in.pdf
- TW2018T-4T-3K 2in.pdf
- TW2018T-4T-4K 2in.pdf
- TW2018T-4T-5K 2in.pdf
- TW2018T-4T-6K 2in.pdf
- TW2018T-8T-2K 2in.pdf
- TW2018T-8T-2.5K 2in.pdf
- TW2018T-8T-3K 2in.pdf
- TW2018T-8T-5K 2in.pdf
- TW2018T-12T-2K 3in.pdf
- TW2018T-12T-3K 3in.pdf
- TW2018T-12T-4K 3in.pdf
- TW2018T-12T-5K 3in.pdf
- TW2018T-125MS-2HP 3in.pdf
- TW2018T-125MS-3HP 3in.pdf
- TW2018T-125MS-B-5HP 3in.pdf
- TW2018T-3BF-3HP 3in.pdf
- TW2018T-3BF-5HP 4in.pdf
- TW2018T-CM3-4 2in.pdf
- TW2018T-CM5-3 2in.pdf
- TW2018T-CM5-4 2in.pdf
- TW2018T-CM5-5 2in.pdf
- TW2018T-CM10-2 3in.pdf
- TW2018T-CM10-3 3in.pdf
- TW2018T-CM10-4 3in.pdf
- TW2018T-CM15-1 3in.pdf
- TW2018T-CM15-2 4in.pdf
- TW2018T-CM15-3 4in.pdf
Duplex Water Pressure Booster Pumps ranging from 30-400 GPM. Great for multi-family buildings, condos, schools, hospitals, office buildings, hotels, and more. Options available: NEMA 4X, BACnet modules, Modbus TCP/IP Modules, EtherNet/IP Modules, and more.
Available Options
Choose the model that best suits your needs and press Add to Quote to request pricing. For Model Specifications, scroll down to Attachments below.
GPM And Boost MAX PER PUMP
Low Water Pressure Solutions from Homes to Hotels
Our Duplex Booster Pump Systems are equipped with centrifugal pumps, regulated by variable frequency drives that control the pumps to maintain constant pressure regardless of varying demand or fluctuating incoming pressure.
Duplex booster pump systems are designed to lead, lag, and alternate every 24 hours of run time. This ensures even wear between each pump. In the event one pump cannot maintain the pressure, the second pump will turn on to assist.
We collaborate with mechanical contractors, engineers, architects, as well as facility owners to trouble shoot problems and find solutions, sometimes right over the phone that day.
We evaluate your situation and supply submittals and pricing on all our water booster pumps, typically within 48 hours and 8 out of 10 systems are built, programmed, tested and shipped within 1 week!
- UL508 Rated VFDs
- Modular Frame for Ease of Transport & Installation
- Lead, Lag, and Alternate as needed
- PLC is not required for networked Yaskawa VFD's Energy Efficient Operation
- Plug-and-Play Installation
- Pre-wired & Factory Tested
- Properly sized pneumatic tank included
In an effort to provide the highest level of customer service we offer a limited three warranty on all of these water booster pump models. All of the model specific data sheets have a page dedicated to discussing the warranty, but don’t hesitate to reach out with additional questions.

| Specifications | |
|---|---|
| HP | 3/4 - 8 |
| GPM | 40 - 200 |
| PSI Boost | 35 - 80 |
Compact Duplex Booster System
- TW2018U-2T-3K 2in.pdf
- TW2018U-2T-4K 2in.pdf
- TW2018U-2T-5K 2in.pdf
- TW2018U-2T-6K 2in.pdf
- TW2018U-4T-3K 2in.pdf
- TW2018U-4T-4K 2in.pdf
- TW2018U-4T-5K 2in.pdf
- TW2018U-4T-6K 2in.pdf
- TW2018U-8T-2.5K 2in.pdf
- TW2018U-8T-2K 2in.pdf
- TW2018U-8T-3K 2in.pdf
- TW2018U-8T-5K 2in.pdf
- TW2018U-12T-3K 3in.pdf
- TW2018U-12T-4K 3in.pdf
- TW2018U-125MS-2HP 3in.pdf
- TW2018U-125MS-3HP 3in.pdf
- TW2018U-125MS-5HP 3in.pdf
- TW2018U-3BF-3HP 3in.pdf
The unique over/under frame allows installation of booster systems in TIGHT SPACES. At 16″ wide and 34″ deep, the COMPACT SERIES will fit into hallways, corners, and under stairwells. For other sizes, please call the factory.
Available Options
Choose the model that best suits your needs and press Add to Quote to request pricing. For Model Specifications, scroll down to Attachments below
Low Water Pressure Solutions from Homes to Hotels
Our Duplex Booster Pump Systems are equipped with centrifugal pumps, regulated by variable frequency drives that control the pumps to maintain constant pressure regardless of varying demand or fluctuating incoming pressure.
Duplex booster pump systems are designed to lead, lag, and alternate every 24 hours of run time. This ensures even wear between each pump. In the event one pump cannot maintain the pressure, the second pump will turn on to assist.
We collaborate with mechanical contractors, engineers, architects, as well as facility owners to trouble shoot problems and find solutions, sometimes right over the phone that day.
We evaluate your situation and supply submittals and pricing on all our water booster pumps, typically within 48 hours and 8 out of 10 systems are built, programmed, tested and shipped within 1 week!
- UL508 Rated VFDs
- Modular Frame for Ease of Transport & Installation
- Lead, Lag, and Alternate as needed
- PLC is not required for networked Yaskawa VFD's Energy Efficient Operation
- Plug-and-Play Installation
- Pre-wired & Factory Tested
- Properly sized pneumatic tank included
In an effort to provide the highest level of customer service we offer a limited three warranty on all of these water booster pump models. All of the model specific data sheets have a page dedicated to discussing the warranty, but don’t hesitate to reach out with additional questions.

| Specifications | |
|---|---|
| HP | 3/4 - 8 |
| GPM | 40 - 200 |
| PSI Boost | 35 - 80 |
Duplex Variable-Speed Booster System with Storage Tank
- TW2018C-4T-4K 2in.pdf
Reliable Performance. Compact Footprint. Smart Control.
The TW2018C-4T-4K from Towle Whitney is a duplex variable-speed booster system with integrated 100-gallon storage tank, designed to deliver consistent pressure and high efficiency in commercial water applications. Ideal for buildings with fluctuating water demands, this system alternates pump usage every 24 hours, extending equipment life and maximizing energy savings.
Built to fit through a 30-inch doorway, the TW2018C-4T-4K is compact, rugged, and engineered for long-term performance.
Available Options
Choose the model that best suits your needs and press Add to Quote to request pricing. For Model Specifications, scroll down to Attachments below.
GPM And Boost MAX PER PUMP
Key Features:
-
Twin Walrus 4T-4K Pumps
Each pump delivers up to 36 GPM with 60 PSI of boost. Constructed with cast iron (stainless steel available). -
Smart Variable Frequency Drives (VFDs)
Yaskawa iQpump Micro VFDs automatically maintain set pressure while alternating lead-lag pump operation every 24 hours. -
100-Gallon Poly Storage Tank
Provides reliable water reserve, ideal for systems with inconsistent supply or backup requirements. -
NEMA 1 Control Cabinet
Optional upgrades to NEMA 4 and single-point electrical connection available. -
Field-Reversible Copper/PVC Manifolds
2" Type L copper and SCH 80 PVC, with plain end and grooved fittings provided. -
Compact Steel Frame
29" W x 42" H x 36" D. Pre-assembled with expansion tanks, valves, gauges, and disconnects. -
Two Pneumatic Expansion Tanks (PLT-5)
Each with 2-gallon capacity, rated for 125 PSI operation.
In an effort to provide the highest level of customer service we offer a limited three warranty on all of these water booster pump models. All of the model specific data sheets have a page dedicated to discussing the warranty, but don’t hesitate to reach out with additional questions.

We Provide Products All Across The USA
Call Now: 800-807-9827
We have clients in the following areas, but service the entire United States!
- Texas
- New York
- California
- Florida
- Pennsylvania
- Illinois
- Ohio
- North Carolina
- Massachusetts
- Georgia
- Virginia
- Tennessee
- Washington
- Michigan
- Arizona