Franklin Electric Inline Controls for Water Pumps & Boosting
Franklin Electric Inline Controls are automatic pump-control devices for compatible residential and light-commercial well pumps, shallow-well jet pumps and surface booster pumps. They sense water demand, start and stop the existing pump, and offer run-dry protection. Choose from the FIL-SWC16, FIL-ADJ16-1G, FIL-ADJ16-2G and FIL-CTL20 by your pump motor voltage, horsepower, amperage and needed pressure-control features.
These are pump controllers, not pumps or complete pressure-boosting packages. Ken’s Distributing Company can confirm the right Franklin Electric control or replacement unit, check compatibility and provide price and availability for customers throughout the United States and Canada. Request a price and availability quote or call 303-699-7845.
If you need the pump and the control as one unit, see the complete Franklin booster pump packages.
Franklin Electric Inline Controls: Quick Specifications
| Selection detail | What to know |
|---|---|
| Product category | On-demand pump start/stop controls; a separate pump is required |
| Listed control models | FIL-SWC16, FIL-ADJ16-1G, FIL-ADJ16-2G and FIL-CTL20 |
| Pump motor compatibility | Single-phase, model-specific: 0.75 HP at 115V for smaller ADJ; up to 2 HP at 230V for SWC/ADJ; up to 3 HP at 230V for CTL |
| Supply voltage | 115 VAC or 230 VAC, depending on the control model |
| Maximum motor current | 16 A for SWC/ADJ controls; 20 A for CTL |
| Water connections | 1-inch MNPT on SWC/ADJ; 1¼-inch MNPT on CTL |
| Device operating-pressure limit | 174 PSI (12 bar) listed in the model-specific manuals |
| Liquid temperature | 131°F (55°C) listed in SWC/ADJ/CTL manuals; confirm the data plate for your unit |
| Starting and protection | Flow-based control with low-pressure backup where specified; run-dry shutdown |
| Approximate minimum detectable flow | 0.26 GPM in the manufacturer manuals |
| Installation position | Vertical with the directional arrow pointing upward, per the manuals |
Important sizing detail: Horsepower limits are voltage-dependent. In particular, the FIL-CTL20 is rated for up to 1 HP at 115V or 3 HP at 230V in the manufacturer manual, subject to its 20 A maximum. These ratings are not interchangeable.
Inline Pump Controller Models, Part Numbers and Ordering Information
Choose a model using the motor nameplate and the existing water-system layout. Only the manufacturer item number is linked in the first column for fast access to its individual Ken’s Distributing Company quotation page.
| Item number | Model | Voltage | Maximum motor size | Max. current | Water connections | Main selection benefit |
|---|---|---|---|---|---|---|
| 91987103 | FIL-SWC16 | 115/230V | Up to 0.75 HP at 115V; up to 2 HP at 230V | 16 A | 1-inch MNPT | Flow and low-pressure backup activation |
| 91987105 | FIL-ADJ16-1G | 115V | Up to 0.75 HP | 16 A | 1-inch MNPT | Adjustable low-pressure start; historical order listing |
| 91987106 | FIL-ADJ16-2G | 230V | Up to 2 HP | 16 A | 1-inch MNPT | Adjustable low-pressure start, pressure gauge |
| 91987107 | FIL-CTL20 | 115/230V | Up to 1 HP at 115V; up to 3 HP at 230V | 20 A | 1¼-inch MNPT | Adjustable maximum pressure regulation, pressure gauge |
The 115V ADJ item 91987105 appears in earlier Franklin product literature and on the Ken’s Distributing individual product page but is not shown in the manufacturer’s shorter current online ordering list. Request availability for this model rather than assuming it is in stock.
Compare SWC, ADJ and CTL Pump Control Functions
All three control types are designed to operate a compatible pump when water is requested, with the features below helping match control behavior to the plumbing system. The controls are fixed-speed start/stop devices, not variable-speed motor drives.
| Control capability | FIL-SWC16 | FIL-ADJ16 (115/230V) | FIL-CTL20 |
|---|---|---|---|
| Flow-based pump activation | Yes | Yes | Yes |
| Run-dry protection | Yes | Yes | Yes |
| Low-pressure backup activation | Yes | Yes | Yes |
| Adjustable low-pressure start setting | No | Yes | No |
| Integrated pressure gauge | Not shown for SWC | Yes | Yes |
| Maximum output pressure regulation | No | No | Yes, built-in pressure-reducing valve |
| 1¼-inch connections | No | No | Yes |
| Manufacturer 24-hour anti-lockup function | Refer to model manual | Refer to model manual | Described in CTL manual |
FIL-SWC16: Simple Automatic Booster Pump Control
Select the SWC when you need an inline water-pump controller with on-demand flow sensing and a low-pressure backup start. This is a practical choice for an appropriately sized surface or jet pump where additional maximum-pressure regulation is not required. Select the voltage, motor size and shut-off pressure from the pump’s data rather than from the controller name alone.
FIL-ADJ16-1G and FIL-ADJ16-2G: Adjustable Pressure Activation
The InlineADJ models add an adjustable low-pressure backup activation point and pressure gauge. The 115V FIL-ADJ16-1G is for smaller motors up to 0.75 HP; the 230V FIL-ADJ16-2G handles up to 2 HP. These options suit systems where the pump start threshold must be coordinated with the building’s pressure requirements.
FIL-CTL20: Up to 3 HP with Maximum Pressure Regulation
The FIL-CTL20 includes a built-in maximum-pressure regulating valve and pressure gauge, making it useful when the pump can develop a higher shut-off pressure than the plumbing system needs. Its manual also describes periodic anti-lockup operation and automatic restart attempts under specified conditions. The 3 HP rating applies at 230V; for 115V operation, the manufacturer specifies a lower 1 HP ceiling.
How Inline Controls Start and Stop a Pump
The controller monitors water use and system pressure. When a fixture opens and demand is detected, it runs the compatible pump; once flow stops, the controller turns the pump off. The low-pressure backup start helps restore supply after the system has lost pressure. This design can replace a conventional pressure switch and large bladder tank in many installations.
The controller does not create pressure by itself or continually adjust motor speed. Actual delivery pressure and GPM are determined by the pump curve, suction conditions, piping and any CTL pressure regulation. A true variable-frequency-drive constant-pressure system is a different type of equipment.
Choosing a Water Pump Pressure Controller for Your Installation
| Your system or requirement | Suitable starting point | What to verify before ordering |
|---|---|---|
| 115V pump motor up to 0.75 HP | FIL-SWC16 or FIL-ADJ16-1G | Current draw; whether an adjustable low-pressure threshold is needed |
| 230V pump motor up to 2 HP | FIL-SWC16 or FIL-ADJ16-2G | 16 A ceiling; pump shut-off pressure; required outlet pressure |
| 230V pump motor above 2 HP, up to 3 HP | FIL-CTL20 | 20 A ceiling, 1¼-inch plumbing and pressure-regulation requirements |
| 115V pump motor up to 1 HP with pressure regulation | FIL-CTL20 | Confirm 1 HP manual limit, motor current and supply voltage |
| Replacement of an existing inline controller | Match exact FIL part number first | Existing nameplate, control features, piping, voltage and motor rating |
| Pump has pressure demand but insufficient flow/head | Pump sizing review first | A controller cannot compensate for an undersized or damaged pump |
For an accurate quote: Send the existing pump model, horsepower, voltage, full-load amperage, suction/discharge sizes and the control part number if replacing an existing unit. For new installations, include the approximate fixture demand and target water pressure.
Common Applications
- Residential well-water pressure control: Automate a correctly sized surface or compatible submersible pump when taps or fixtures are opened.
- Shallow and convertible jet-pump systems: Replace a conventional pressure-switch arrangement where the control and pump operating specifications match.
- Pressure boosting for homes and small buildings: Operate an existing booster pump on demand without treating the controller as a booster pump itself.
- Irrigation and water-transfer systems: Start and stop a suitable pump according to demand, within the control’s pressure and motor limits.
- Existing control replacement: Source the same FIL-SWC16, FIL-ADJ16 or FIL-CTL20 order number for a failed or outdated compatible controller.
Tank Requirements, Mounting and Pump Compatibility
- Pressure tank: A bladder tank is optional in many suitable applications. Where the pump cycles excessively or the system includes certain two-wire submersible motors, a small tank may still be needed to respect motor start limits.
- Vertical installation: The manufacturer manual shows the control installed vertically in the discharge line, with its flow arrow upward. The installed pump and plumbing must follow the actual model manual.
- Water temperature and pressure: The specific SWC, ADJ and CTL manuals show 131°F and 174 PSI controller limits. Select to the more restrictive rating of the control, pump, seals and plumbing.
- Pump selection: Verify the pump can rebuild system pressure above the backup-start point and that its shut-off pressure will not exceed installation limits.
- Motor and wiring: Confirm nameplate volts, phase, current and HP. Proper pump motor connections, grounding and protective devices are needed for the selected control.
Replacement Inline Controls and Pump Repair Parts
If a controller no longer starts the pump, frequently trips, fails to reset or does not register flow as expected, a like-for-like replacement may be simpler than changing the entire water-pressure system. Match the existing FIL model number and item number, then confirm the new unit’s controls, wiring and pipe fit.
If the controller is working but pressure is weak, the cause may be the pump, motor, suction piping, impellers, seals or another water-system component. Ken’s Distributing Company can help you request a replacement control as well as Franklin Electric pump replacement and repair parts.
Frequently Asked Questions
Is the Franklin Electric Inline Controls system a booster pump?
No. The FIL-SWC16, FIL-ADJ16 and FIL-CTL20 items on this page are electronic and hydraulic pump-control devices. They operate an existing compatible pump. A separate booster or well pump is needed to create water pressure.
Which Inline Controls model supports a 3 HP motor?
FIL-CTL20, item 91987107, is listed up to 3 HP when wired for 230V within its 20 A rating. The CTL manual lists a 1 HP maximum for 115V use.
What is the difference between FIL-SWC16 and FIL-ADJ16-2G?
Both are 16 A controls for compatible water pumps. FIL-SWC16 supports 115V or 230V supply; FIL-ADJ16-2G is a 230V model with adjustable low-pressure backup activation and a pressure gauge.
Does the FIL-CTL20 offer constant pressure through variable speed?
No. FIL-CTL20 switches an external pump on and off and includes maximum-pressure regulation; it is not a variable-frequency drive and does not continuously vary pump speed.
Can I use the controls without a pressure tank?
Often yes, where the pump and piping are suitable. Franklin’s installation instructions also discuss cases where a small auxiliary tank is beneficial to reduce excessive starts, so assess the actual system rather than removing a tank automatically.
Is the maximum liquid temperature 150°F or 131°F?
The broad manufacturer product overview mentions 150°F, but the model-specific manuals for SWC, ADJ and CTL show 131°F. Check the data plate and current manual for the exact item before selecting it for warm-water service.
Can Inline Controls be connected to BT4 or MH booster pumps?
Potentially, if the specific pump motor, voltage, current, pressure and control arrangement are compatible. Some BT4 and MH models exceed these motor limits or already use dedicated controls. Confirm the exact pump model before ordering.
What do I need to request the correct replacement controller?
Send the controller item or model number, pump motor horsepower, voltage and full-load amps, piping connection size and a photo of the nameplate. Ken’s Distributing Company can confirm compatibility, pricing and availability.
Related Franklin Electric Water Pumps and Controls
- Franklin Electric BT4 Horizontal Multi-Stage Booster Pumps for installations needing a separate booster pump.
- Franklin Electric MH Horizontal Multi-Stage Booster Pumps for residential and light-commercial water pressure boosting.
- Franklin Electric VersaJet Shallow-Well Jet Pumps for suitable well-water systems.
- Franklin Electric C-Series Convertible Jet Pumps for shallow- or deep-well jet installations.
Request Price and Availability for Inline Pump Controls
Ken’s Distributing Company supplies Franklin Electric Inline Controls and related water pumps and repair parts for customers across the United States and Canada. Send us your FIL model or item number and your pump details, and we will confirm fit, price and availability. We reply within one business day.
Send us your model number and we will confirm fit, price, and availability.