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Franklin Electric Booster Pumps
Franklin Electric VersaBoost Pro Constant Pressure Boosting System - NSF 61/372, VFD with FE Connect, 0.8-1.1 HP
Franklin Electric
Franklin Electric VersaBoost Pro Constant Pressure Boosting System - NSF 61/372, VFD with FE Connect, 0.8-1.1 HP
- Price
- From $2,404.80
Franklin Electric Inline Controls Pressure Boosting System - SWC / ADJ / CTL, Up to 3 HP
Franklin Electric
Franklin Electric Inline Controls Pressure Boosting System - SWC / ADJ / CTL, Up to 3 HP
- Price
- From $155.40
Franklin Electric BT4 Series Horizontal Multi-Stage Booster Pump - NSF 372, Stainless Steel, 5-45 GPM, 1/2-3 HP
Franklin Electric
Franklin Electric BT4 Series Horizontal Multi-Stage Booster Pump - NSF 372, Stainless Steel, 5-45 GPM, 1/2-3 HP
- Price
- From $1,410.66
Franklin Electric MH Series Horizontal Multi-Stage Booster Pump - Stainless Steel, 15-90 GPM, 1/2-7.5 HP
Franklin Electric
Franklin Electric MH Series Horizontal Multi-Stage Booster Pump - Stainless Steel, 15-90 GPM, 1/2-7.5 HP
- Price
- From $1,636.11
Franklin Electric Booster Pumps
Franklin Electric Water Systems · Multi-Stage, Centrifugal & Constant Pressure
Franklin Electric
Booster Pumps
A booster pump raises water pressure from a city main or a private water system — for irrigation, filtration, wash-down, RO, misting, and everyday plumbing. Franklin gives you three ways to do it: high-performance multi-stage and centrifugal pumps, inline flow controls that make an existing pump behave like a constant-pressure system without a tank, and an all-in-one constant-pressure unit. Watermain Supply stocks and supplies the full booster lineup, matched to your source pressure, target pressure, and flow. This page covers every booster line we carry and how to choose.
to 400 PSI
BT4 Max Discharge
5–90 GPM
Boosting Flow Range
1/2–7.5 HP
Fractional to Commercial
3 Ways
Pump · Control · System
Product Identification & Sourcing Notice
Franklin Electric product information on this page — model numbers, series names, specifications, and application data — is published for product identification and information only, and is drawn from Franklin Electric’s own literature. Franklin Electric, FPS, VersaBoost, and all related names, models, and specifications are trademarks of Franklin Electric Co., Inc., used here for identification only. Watermain Supply is an independent supplier and is not an authorized Franklin Electric distributor; Franklin Electric products are sourced directly through our own supply channels. For select other manufacturer lines, Watermain Supply is a factory-authorized distributor. Specifications may change without notice — confirm all models, ratings, and availability with us before ordering.
The Lineup
More Pressure, However You Need To Get It
Whether you’re boosting off a weak city main, pressurizing a private well or cistern, feeding an irrigation zone, or holding steady pressure across a whole house, Franklin’s booster lineup covers it — from a bare stainless pump end to a turnkey, app-connected constant-pressure system.
Start with what you have and what you want. If you have water at some pressure and simply need more of it, a multi-stage booster (BT4 or MH) delivers high pressure in a compact stainless body. If you need circulation, transfer, or jockey-pump duty, the close-coupled DR centrifugal is the simpler answer. If your problem is steady pressure rather than more pressure, an inline control turns an existing pump into a demand-driven system without a tank — or the VersaBoost Pro does it all in one enclosure.
Give us three numbers — your incoming (source) pressure, your target pressure, and your peak flow — and we point you to the right line and confirm the curve.
Multi-StageCentrifugalInline ControlConstant PressureStainless SteelBare Pump Ends
Choosing An Approach
Three Ways Franklin Boosts Pressure
Boosting isn’t one product — it’s a decision about whether you need raw pressure, simple transfer, demand-based control, or a complete system. Here’s how the lines split.
Pump · Control · System
1
The Pump — BT4, MH, DR
Multi-stage pumps (BT4, MH) stack impellers to build high pressure in a small footprint. The DR centrifugal is single-stage for circulation, transfer, and jockey service. This is the raw pressure-and-flow layer.
2
The Control — Inline SWC / ADJ / CTL
A flow-activated device that starts and protects a pump on demand and replaces the pressure tank and switch — making an ordinary pump behave like a constant-pressure system.
3
The System — VersaBoost Pro
Pump, variable frequency drive, check valve, and expansion tank engineered together in one quiet enclosure that holds one set pressure no matter the draw. Turnkey.
Why multi-stage hits such high pressure. Each stage of a multi-stage pump adds pressure to the last, so stacking stages in series builds hundreds of PSI without a huge motor — that’s how the BT4 reaches up to 400 PSI max discharge in a slim stainless body. In a vertical multi-stage pump, pressure (stages), not flow, is what drives the size and cost.
More Pressure vs Steady Pressure
Two different problems. If your fixtures are simply weak, you need more pressure — a booster pump. If pressure swings every time a tap opens, you need steady pressure — an inline control on your pump, or a VersaBoost Pro. Tell us which one you’re fighting.
Selection Note
Nominal flows, pressures, and HP below are approximate and vary by model, stage count, and motor. Watermain Supply provides engineering-led sizing and selection; the final duty point is confirmed against Franklin Electric published performance data before you order.
Stainless Multi-Stage · High Pressure In A Compact Body
Multi-Stage Booster Pumps
Franklin’s stainless multi-stage families deliver high pressure from a city main or private system for irrigation, RO, filtration, misting, and general boosting. Pick BT4 for maximum pressure, MH for higher flow.
Highest Pressure
BT4 Series
BT4 High-Performance Booster · 5–45 GPM
Franklin’s patented Tri-Seal floating stage system in a stainless shell and discharge, with acetal impellers, Modified PPO diffusers, and 300-series stainless internals. ODP square-flange 2-compartment motors are serviced without dismantling the pump end or disturbing the plumbing. The pressure workhorse of the lineup.
- Flow5–45 gpm
- HP1/2–3
- Max discharge400 PSI
- Max inlet75 PSI
- Max fluid temp120 °F
Higher Flow
MH Series
MH Horizontal Multi-Stage · 15–90 GPM
An all 300-series stainless steel wet end on UL778 square-flange 2-compartment motors, three-phase inverter-duty rated. Where the BT4 chases pressure, the MH targets higher nominal flow — the pick for higher-volume boosting, filtration, and misting at moderate pressure.
- Flow15–90 gpm nominal
- HP1/2–7.5
- Wet endAll 300-series stainless
- Working pressureto ~140 psi*
- Max fluid temp225 °F
Motor-Not-Included · BT4 56C Pump Ends
The BT4 5–25 GPM hydraulics are also available as a bare pump end for a customer-supplied NEMA 56C keyed-shaft motor — the same Tri-Seal stainless hydraulics, 1/3–3 HP, 1 in NPT. Note: these 56C pump ends are not compatible with the square-flange complete assemblies. View BT4 56C Pump Ends →
*MH working-pressure figure reflects Franklin’s documented residential/light-commercial models; higher-flow and higher-HP MH models may carry different ratings — confirm the curve for your model.
Close-Coupled Single-Stage
DR Series Centrifugal Pumps
When the job is circulation, transfer, or jockey-pump duty rather than high-pressure boosting, the close-coupled DR centrifugal is the simpler, cost-effective answer — back pull-out serviceable, factory wet-tested, with a discharge that rotates in 90° increments.
Circulation & Transfer
DR Series
DR Close-Coupled Centrifugal · 1/2–2 HP
Robust cast iron volute standard, with a stainless steel volute option on the DR1. Enclosed impeller (thermoplastic and stainless options), mechanical seal, and a back pull-out design that opens the internals without disturbing the plumbing. Every unit is factory wet-tested before it ships.
- Flowto ~95 gpm
- HP1/2–2
- VoluteCast iron; SS option (DR1)
- Discharge90°-rotatable
- Max fluid temp120 °F
Best For
Water circulation and transfer, spraying systems, jockey-pump service on a fire or pressure-maintenance loop, and general-purpose pumping where you don’t need multi-stage pressure.
Cast Iron or Stainless Volute?
The DR2 comes in cast iron; the smaller DR1 offers a stainless steel volute option for cleaner or mildly aggressive water. Tell us the liquid and we’ll spec the volute.
Start It, Protect It, Skip The Tank
Inline Controls
A flow-activated smart device that starts a pump on demand and replaces the external pressure tank and differential switch. Starts at 0.25 gpm of flow, protects against dry run, dead-head, over-current, and locked-system faults, and adds a daily auto-run and automatic restart. Three models, up to 3 HP.
SWC
Flow-Start · up to 2 HP
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Straightforward flow-activated start with a fixed 22 psi low-pressure backup
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16A, 115/230V, built-in check valve, 1 in MNPT
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Best for: the simplest tank-free pump start
ADJ
Adjustable Cut-In · up to 2 HP
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Adjustable 22 / 29 / 36 psi low-pressure cut-in with a built-in pressure gauge
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16A, 230V, built-in check valve, 1 in MNPT
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Best for: dialing in the low-pressure trigger to the system
CTL
Pressure-Regulating · up to 3 HP
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Adds a built-in pressure-reducing valve to cap maximum output pressure
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20A, 115/230V, built-in check valve, 1-1/4 in MNPT
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Best for: when the pump can’t be down-sized to the system’s limits
Pick The Control To The Pump
With the SWC and ADJ, the pump’s shut-off pressure is realized in the system, so proper pump selection matters. If the pump can’t be sized down to the system’s pressure limits, choose the CTL with its built-in pressure-reducing valve. Send us the pump and we’ll match the control.
All-In-One · Pump, Drive, Tank & Check Valve In One Box
VersaBoost Pro Constant Pressure System
The turnkey answer when you want steady pressure out of the box: an encapsulated 4 in submersible pump-motor with a Franklin-engineered variable frequency drive, integrated check valve, and expansion tank, all in one compact, quiet enclosure. Holds one set pressure no matter the draw, NSF/ANSI 61 & 372 certified.
Turnkey Constant Pressure
VB Pro
VersaBoost Pro · 0.8–1.1 HP
Delivers 18–25 gpm to 80 psi, as quiet as 45 dB, controllable from the FE Connect app over Bluetooth and WiFi, and scalable to four units in parallel. Rated NEMA 3R for indoor or outdoor use, with a 180° rotatable top for front or rear plumbing. Integrated check valve and expansion tank included.
- Flow18–25 gpm
- Pressure14–80 psi
- DriveFranklin VFD, FE Connect
- CertificationNSF/ANSI 61 & 372
- Max suction lift25 ft
Inline Control or VersaBoost Pro?
An inline control is the economical way to make an existing pump run like a constant-pressure system. VersaBoost Pro is the answer when you want pump, drive, tank, and check valve engineered together and installed as one unit — and when you want app monitoring and multi-unit scaling.
| Model | Voltage | HP | Max Flow | Max Pressure |
|---|---|---|---|---|
| FE-VBPRO-115 | 120V | 0.8 | 18 gpm | 80 psi |
| FE-VBPRO-230 | 208–240V | 0.8 | 18 gpm | 80 psi |
| FE-VBPROXT-230 | 208–240V | 1.1 | 25 gpm | 80 psi |
Specifications from Franklin Electric published data. Confirm model, voltage, and pressure setting for your system before ordering.
The Booster Lineup, One Table
Franklin Booster Comparison
| Line | Type | Flow | HP | Key Spec | Reach For It When |
|---|---|---|---|---|---|
| BT4 Series | Multi-stage booster | 5–45 gpm | 1/2–3 | to 400 PSI, stainless | Maximum pressure boosting |
| MH Series | Multi-stage booster | 15–90 gpm | 1/2–7.5 | All 300-SS wet end, to ~140 psi | Higher-flow boosting |
| BT4 56C Pump Ends | Booster pump end | 5–25 gpm | 1/3–3 | Motor not included | Pairing with a 56C keyed-shaft motor |
| DR Series | Centrifugal, close-coupled | to ~95 gpm | 1/2–2 | Cast iron or SS volute | Circulation, transfer, jockey duty |
| Inline Controls | Control device | 0.25 gpm start | to 3 | SWC / ADJ / CTL | Smart pump start without a tank |
| VersaBoost Pro | Constant pressure system | 18–25 gpm | 0.8–1.1 | VFD, NSF 61/372, to 80 psi | Turnkey constant pressure |
Flow, pressure, and HP figures are nominal and vary by model, stage count, and motor — see each product page for full performance tables. Specifications are drawn from Franklin Electric published data.
Get It Right The First Time
How to Size a Booster
Three numbers and one decision pick the product. Send them over and we return an engineering-led selection — the right pump, control, or system, with the curve confirmed.
1. Source pressure (inlet PSI). The pressure coming in from the city main, well, or cistern. A booster adds to this; if inlet pressure varies, tell us the low end.
2. Target pressure (PSI). The pressure you need at the fixtures, irrigation zone, or process. The difference between target and source is the boost the pump has to provide.
3. Peak flow (GPM). The most water that runs at once. This drives the line and the HP — and, on a multi-stage pump, the stage count.
4. Pump, control, or system? Need raw pressure → BT4 or MH. Need circulation or transfer → DR. Have a pump but want steady pressure → an inline control. Want it all in one box → VersaBoost Pro.
What You Get Back
A recommendation with the nominal duty point, the stage count and motor that fit, and the control or constant-pressure approach that matches — all confirmed against Franklin Electric performance data. We don’t commit a final model or duty point until it’s verified for your numbers.
Where These Pumps Go To Work
Booster Pump Applications
The same lineup covers pressure work across homes, farms, commercial buildings, and light industry.
Franklin boosters handle pressure boosting from a city main or private water system, water transfer and circulation, lawn and crop irrigation and residential sprinkler systems, reverse osmosis and filtration, pressure washing, poultry houses, equipment spray and evaporative cooling / misting, aeration and wash-down, commercial water features and fountains, cisterns, and jockey-pump service. The inline controls and VersaBoost Pro add hands-off constant pressure to any of them.
Pressure BoostingIrrigation & SprinklerRO & FiltrationMisting & CoolingPressure WashingPoultry HousesJockey PumpConstant Pressure
Straight Answers
Booster Pump Questions
What is a booster pump and when do I need one?
A booster pump raises the pressure of water that’s already at the surface or already pressurized — unlike a jet or well pump, which lifts water up. If your fixtures, irrigation, or process don’t have enough pressure, a booster adds it. If your problem is pressure that swings rather than pressure that’s too low, look at an inline control or the VersaBoost Pro instead.
BT4 or MH for my boosting job?
What is a multi-stage pump, and why does it hit such high pressure?
A multi-stage pump puts several impellers in series, so each stage adds pressure to the last. Stacking stages builds hundreds of PSI without an oversized motor — which is how the BT4 reaches up to 400 PSI in a slim body. In these pumps, pressure (stage count) is what drives size and cost, not flow.
DR Series or a multi-stage booster?
Do I still need a pressure tank?
Not necessarily. The Inline SWC, ADJ, and CTL replace the external pressure tank and differential switch, starting the pump on flow demand (down to 0.25 gpm). The VersaBoost Pro includes its own expansion tank. A traditional booster on a switch still uses a bladder tank — tell us your setup and we’ll spec it.
SWC vs ADJ vs CTL — what’s the difference?
All three are flow-activated controls with dry-run and dead-head protection. SWC is the straightforward flow-start unit with a fixed 22 psi backup. ADJ adds a gauge and a selectable 22, 29, or 36 psi cut-in. CTL adds a built-in pressure-reducing valve to cap output pressure — the pick when the pump can’t be down-sized to the system’s limits.
Can I buy just the BT4 pump end?
Yes. The BT4 56C pump ends give you the 5–25 GPM Tri-Seal stainless hydraulics (1/3–3 HP, 1 in NPT) as a bare pump end for a customer-supplied NEMA 56C keyed-shaft motor. Note they’re not compatible with the square-flange complete assemblies — confirm your motor frame with us first.
Do you sell Franklin boosters if you’re not an authorized distributor?
Yes. Watermain Supply is an independent supplier and sources Franklin Electric products directly through our own channels — we are not an authorized Franklin Electric distributor, and this page is provided for product identification and information. For select other manufacturer lines we are a factory-authorized distributor. Either way, we confirm current models, ratings, and pricing before anything ships.
Information & Sourcing Disclaimer
This page is provided for product identification and information only. Watermain Supply is an independent supplier of Franklin Electric products — sourced directly through our own channels, not as an authorized Franklin Electric distributor — and a factory-authorized distributor for select other manufacturer lines. Franklin Electric, FPS, VersaBoost, and all related names, models, and specifications are trademarks of Franklin Electric Co., Inc., used here for identification only. All specifications are drawn from Franklin Electric published data and may change without notice — confirm current models, ratings, availability, and pricing with us before ordering.
Sizing a Booster? Let’s Spec It.
Engineering-led selection on every booster pump, inline control, and constant-pressure system — matched to your source pressure, target pressure, and flow. Independently supplied, verified before it ships.
Email sales@watermainsupply.comOr call 281.664.8000 — same-day quotes on stocked items
Watermain Supply Houston, TX · watermainsupply.com
281.664.8000 sales@watermainsupply.com
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