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MODELS
iPF - 8, 10, 12, 14, 16

Features

• Field Programmable
• Multiple Flow Rate Calibration Points
• Uses Multiple Diameter Flow Tubes
• High and Low Flow Warnings
• Totalizing Flow Function

Specifications

Display Module
Supply Voltage: 9 - 30 VDC
Supply Current: 0.5 Amp

Flow Tube
Material: Aluminum
Sizes Available:
iPF- 8 1.5" Tube w/2.5" Couplings (13 - 320 GPM)
iPF-10 2.0" Tube w/2.5" Couplings (21 - 520 GPM)
iPF-12 2.5" Tube w/2.5" Couplings (30 - 750 GPM)
iPF-14 3.0" Tube w/NPT Threads (40- 1400 GPM)
iPF-16 4.0" Tube w/NPT Threads (80 - 2000 GPM)

Note: GPM rating is at 0 PSI back pressure (no obstruction at end of tube).

Flow Sensor
Type: Paddlewheel with Brass Housing for Saddle Clamp or Weldment Mount (Stainless Steel Housing Optional)
Sensor Material: Acetal (Delrin) with Stainless Steel (316) Shaft
Excitation Voltage: 5 VDC

Cables
120 VAC Power Cable: Part # IPF-C120
Flow Sensor Cable: Part # IPF-C-12 (12 Feet)
12 VDC Power Cable: Part # IPF-C12V (Optional)

GENERAL DESCRIPTION

Components

The INSIGHT Portable Flow Tester consists of the following components:

• Case
• Digital Flowmeter Display
• Battery and Charger
• Flow Tube(s)
• Paddlewheel Flow Sensor and Sensor Housing Assembly
• Cables

Case
Mounted inside the Pelican case is a panel that has a digital flowmeter display module, power switch, low battery indicator, and input cable connectors installed. The case also houses a rechargeable battery and an AC charger/power supply. A slot
cutout in the front panel allows for the storage of cables. All controls and indicators
are located on the front panel. (Refer to Controls and Indicators.)

Digital Flowmeter Display Module
The flowmeter display module contains a digital display, two buttons and an LED. It also houses the electronics and programs that are used to operate the portable tester. The programs are accessed and inputs are made by using two buttons on the front of the display module.

Battery and Charger
The battery and charger used in the tester is a maintenance free, sealed lead acid battery. If any problems occur with any of the charging circuits, or if it is found during a test that the battery is not charged, it is possible to power the unit directly from either a 120 VAC or a 12 VDC source. (Refer to Power section.)

Flow Tube(s)
The tester can store in memory calibration data for up to six flow tubes. Each flow tube will have a mount for a paddlewheel flow sensor.

Paddlewheel Flow Sensor
The flow sensor provides an input signal to the display module that is proportional to the flow rate through the tube. It is mounted in the discharge end of the tube. The electrical connector is waterproof and molded into the flow sensor housing.

TYPICAL APPLICATIONS

Hydrant Total Flow Test
A direct reading of flow in Gallons Per Minute (GPM) can be obtained by connecting the portable flow tester to a discharge, flow water and record the flow displayed. The tester can also be used (employing some simple math) to find the total output of a hydrant. This can be accomplished by recording the differences in flow out of one discharge as other ports on the hydrant are opened.

The hydrant test method described below assumes the use of a portable flow tester with a 2.5" flow tube. If a different size tube is used, the mathematical calculations below would need to be adjusted.

The Portable Flow tester may be connected to the 2.5" hydrant port in order to obtain individual hydrant flow measurements. Other ports may be opened as desired. To conduct this test, proceed as follows:

1.  Connect the flow tube to a 2.5" port. (Adapters are not supplied.)
2. Open the hydrant valve and record the flow reading.
3. Shut off the hydrant and remove the other 2.5" cap.
4. Open the hydrant valve and record the flow reading.
   Note: This reading will be lower than the first reading as the water is now being discharged from two ports.
5. If the hydrant has a steamer port, open that and record the flow as above.

If more than one port is opened, the total actual flow will be higher than the displayed flow, but it will be in proportion to the opened port areas. The actual flow can be determined by multiplying the displayed flow by a "K" factor such that:

Total Estimated Flow = Displayed Flow x K

Use the following values for "K" to determine actual estimated flow.

Table 1 Values for K with a 2.5" flow tube

For different size flow tubes the value for K that is used to determine total flow out of the hydrant will be different than those shown in Table 1. Use the following formula to determine new value for K.

constant K            = Total Flow Area
                                 Area of Flow Tube opening

Total Flow Area means finding the sum of the areas of all open discharges.
Remember the Area of a circle is л r2

K factors are used as multipliers to determine total flow out of a hydrant when the portable flow and pressure meter is hooked up to only one port of the hydrant, but water is flowing out of more than one.

Pump Test
The Portable Flow Tester can be used to test pumpers not only from draft but also from the tank or from a hydrant. It is extremely valuable to know not only that your pumper can pass the service test, but remember it is necessary to know your capabilities on the fire ground.

Make sure your pump can supply your preconnected lines with enough water from the tank, if that is the way you expect to use them. For in-line pump testing, attach the portable flow tester to the hydrant and run a typical hose layout. Next, extend your standard fire fighting lines and open them. Monitor the flow.

For the service type of test, connect three lines into a common manifold. On the discharge of the manifold connect a short length of hose leading into the portable flow tester. Attach another length of hose on the discharge side and connect this to a deck gun or monitor. If the monitor incorporates a sufficient straight length, with an integral stream straightener, then the tester may be attached on to the discharge end of the monitor in lieu of the nozzle.

Test the pumper according to the certification pressure, RPM, and volume or pressure pump settings. To do that, set the RPM and then adjust the pump pressure by adjusting the discharge valves. Correct the RPM if it has changed and readjust the pressure if that has changed. When you are at the correct pressure and RPM point, note the flow. The flow should meet the pumper rating at that pressure and RPM.

Nozzle Test
Attach a hose to the inlet of the flow tube and the nozzle to be tested on the discharge of the flow tube. The nozzle may be either a smooth bore type or automatic. Flow the nozzle at various pressures and note the flow and pressure displayed on the readout. This test will provide a vivid depiction of the nozzle pressure/flow relationship.

Training
Use the Portable Flow Tester in training sessions to show firemen the effects of pressure and flow on hose handling, reach of stream, the effects of kinked hose, etc. as pumper pressure and nozzle sizes are changed. Install the flow tube in the line behind the nozzle, preferably not directly on to the discharge port of the pumper. Both the nozzleman and the pump operator vary their valves. It is now possible to monitor the flow and thus determine the optimum flow for various situations. This will be a graphic presentation of interaction of pressure, flow, and nozzles. It will also demonstrate the desirability of Fire Research Flow and Pressure Testers, which have been specifically designed for the fire industry, particularly in the case where automatic nozzles are used.

Calibrate a Vehicle Mounted Flowmeter

1. Connect the portable flow tester flow tube to the pump suction port. (Refer to Figure 2.)

2. Lay a 2 1/2" hose from the discharge to be tested to the flow tube making sure there is no kink in the hose.

3. With the pump engaged open the discharge gate slowly all the way.

4. Control the flow with the suction port valve and by changing the RPM if needed.

5. Read the displayed flow on the tester flowmeter.
   Note: Refer to the vehicle flowmeter manufacturer's instructions to determine how to adjust the calibration of the vehicle mounted flowmeter.

6. Have an assistant calibrate the vehicle flowmeter to match the reading on the tester flowmeter.

Table 2. Flowmeter Calibration Flow for Each Pipe Size
Note: (Reference NFPA 1901) Each fowmeter shall be calibrated to an accuracy of ±5 percent when flowing the amount of water shown in for the pipe size in which it is mounted.

POWER

Internal Battery
IMPORTANT: Before using the Portable Flow Tester for the first time, the battery must be charged for at least six (6) hours.
The Portable Flow Tester is powered by a rechargeable battery and must be charged regularly. A fully charged battery will provide approximately six hours of operating time. When the tester is not in use, the ON/OFF switch should be left in the OFF position. The LOW BATTERY WHEN LIT indicator will illuminate when the battery needs to be charged.

Charging
A 120 volt charger is mounted inside the box. A 120 VAC power cable is supplied to power the charger. To charge the internal battery plug the cable into the AC CHARGER input on the front panel and connect the other end to a standard 120 VAC electrical outlet.
The battery must be charged with the ON/OFF switch in the OFF position.

Replacing the Battery
The battery used in the tester is a 12 VDC, 3.4 Ah, maintenance free, sealed lead acid battery. The battery should last 3 to 4 years depending on use. To remove the battery:

1. Remove the four retaining screws on the bottom of the flow tester case.
2. Open the cover and lift out the front panel.
3. Remove the two screws holding the battery to the front panel.
4. Remove the wires form the battery terminals.

To install a battery do the steps in reverse.

Alternate Power Sources
If any problems occur with any of the charging circuits, or if it is found during a test that the battery is not charged, it is possible to power the tester directly from either a 120 VAC or a 12 VDC source.

The tester will operate normally and can be used to perform flow tests when connected to a 120 VAC power source. Plug the AC Power Cable into the AC CHARGER input on the front panel and connect the other end to a standard 120 VAC electrical outlet. The flow tester will work from the internal DC power supply.

A 12 VDC power source (car or truck battery) can also be used to power the flow tester. Plug the optional 12 VDC Power Cable into the EXTERNAL POWER DC VOLTAGE input on the front panel and connect the other end to a 12 VDC source.

OPERATION
Caution: Care should be taken not to drop the flow tube. Dropping the flow tube could result in damage the exterior of the tube or the flow sensor.
Note: Before using the Portable Flow Tester for the first time, it must be charged for at least six (6) hours.

The battery used in the tester is a maintenance free, sealed, lead acid battery. If any problems occur with any of the charging circuits, or if it is found during a test that the battery is not charged, it is possible to power the unit directly from either a 120 VAC or a 12 VDC source. (Refer to Power section.)

It is recommended that the calibration of the meter be checked once annually or if the operator feels that the reading might be erroneous.

Program Features
See Programming section for more detailed information.

High and Low Flow Warning (Codes 315 and 316)
When the flow rate is above the programmed high flow value a flashing -HI- will show in the digital display. When the flow rate is below the programmed low flow  value a flashing -LO- will show in the digital display.

Flow Cutoff (Codes 318 or 319)
The digital display will show 0 when the flow rate goes below the programmed flow cutoff value.

Flow Test

Set-up
Note: FRC does not provide adapters for connecting flow tubes. Use appropriate adapters as necessary.

1. Ensure the tester battery is charged or connect it to an alternate power source.
   Note: The flow sensor is positioned at the discharge end of the flow tube.

2. Attach a water source to the intake side of the flow tube. Best results will be obtained by a short run (perhaps 10 feet) of relatively straight hose from the source to the flow tube.

3. On the discharge side of the flow tube attach a hose, a nozzle, a quarter turn ball valve, or leave free depending on the type of test.

4. Connect the flow sensor cable between flow tube sensor and the sensor input on the front panel of the tester.

5. Place ON/OFF switch to ON the display will flash the calibration/tube size program. After 3 seconds the display will switch to show 0 GPM.

6. Press MODE button to display the current sensor/tube size program.

7. If the sensor/tube size program is correct, press and hold MODE button until the display begins to flash, release the button and proceed with the flow tests.

8. If the sensor/tube size program is not correct, select the correct program.

Select Sensor/Tube Size
Note: The sensor/tube size programs must be pre-entered into memory and calibrated. (Refer to Programming section.) If a sensor/tube size had been entered but not calibrated it can not be selected. (Refer to Calibration section.)

1. Press MODE button to display the current sensor/tube size program.

2. Each time the MODE button is pressed the display will show the next available program.

3. When the desired program is shown in the display, press and hold MODE button until the display begins to flash.

4. Release MODE button to select the sensor/tube size program.

5. Proceed with the flow tests.

Totalized Flow
The total button is used to perform two functions, display total flow and reset the totalized flow to 0 if the reset function is set to YES.

Display Total Flow
When the TOTAL button is pressed and released the digital display will show the total accumulated flow and the TOTALx100 LED will be on. (The flow will be x 100 the number shown in the display.)

Press and release the button again to show normal flow rate.

The total will continue to accumulate even if power has been off unless the reset function is enabled.

Reset Total Flow to 0
The totalizer reset function (code 317) has two program settings YES or no. (Refer to Programming section.) To enable the reset function the program totalizer reset is set to YES.

Totalized flow will reset and start from 0 when power is off. Flow total can be reset to 0 during operations by displaying the total flow and then pressing and holding the TOTAL button until the display shows 0.

PROGRAMMING
The program access mode is selected and inputs are made by using the two buttons on the front of the flowmeter display module. The digital display will show stored data and operator inputs. (Refer to Figure 2.)

Note: When entering codes in the program access mode there is a time out feature that requires an operator input be made every three seconds. If an input is not detected at a button within three seconds the program will return to normal operation.

Inputs The two buttons on the front of the display module allow the operator to gain access to stored data and program functions. The MODE button is used to display and select the calibration/tube size program.

Both the MODE and TOTAL buttons are used to enter a program code. Once a program code is entered the MODE button is used to select the digit to be changed and the TOTAL button is used to change the digit or option choice. 

PROGRAM ACCESS MODE DISPLAYS

Mode Selected:		Ready for program code to be entered.
Entering Code:		Ready for first digit of code to be entered.
Code Entered:		Valid three digit code.
Automatic:		Programmed value or option is shown.
Exit Mode:		Ready for another program code to be entered or return to normal operation.
Change Option:		New program value or option is selected.
Error Code:		Shows if an invalid program code has been entered.

Note: Refer to Program Access Mode for detailed information.

Program Access Mode
To gain access to the program features a three digit program code must be entered. Review the Program Code Descriptions or refer to Table 3. Program Code Quick Reference for the proper three digit code.
Note: There is a time out feature that will return the program to normal operation in three seconds if input is not detected at the buttons.

Select Program Access Mode
Turn on power. Press the MODE button and hold it until the display shows four dashes. The program access mode is ready for a three digit program code to be input.

Enter Program Code
Note: There is a time out feature that will return the program to normal operation in three seconds if input is not detected at the buttons.

1. Select the Program Access Mode (four dashes are shown in the display).

2. Press the MODE button. The display will show the number 100 and the first digit 1 will flash. Each time the MODE button is pressed the number will scroll up by 1. Set the first digit to the number desired.

3. Press the TOTAL button. The second digit shown in the display will flash. Each time the TOTAL button is pressed the number will scroll up by 1. Set the second digit to the number desired.

4. Press the MODE button. The third digit shown in the display will flash. Each time the MODE button is pressed the number will scroll up by 1. Set the third digit to the number desired. When a valid three digit program code is entered the display will show a program value or an option. If an invalid code is entered the display will show an error code.
   Note: When a valid code has been entered and the display shows a programmed value or an option, the time out feature is disabled.

Change Values or Options
Press the MODE button to select the digit that is to be changed. The digit will flash. Press the TOTAL button to change the digit or the option choice.

Exit Program Access Mode
Press both the MODE and TOTAL buttons and hold them until four dashes are shown in the display. Release the buttons and enter a new code or after 3 seconds the program will time out and return to normal operation.

Program Code Descriptions
When a valid three digit program code has been entered a program value or option will show in the display. The MODE and TOTAL buttons are used change the data. The MODE button will select the digit that is to be changed. The digit will flash. The TOTAL button will change the digit that is flashing or change the option choice.

Table 3 provides a quick reference of the program codes.
 

311

• Refer to Program Code Descriptions for detailed information.
• There is a timeout feature that will return the program to normal operation in three seconds if input is not detected at the buttons.
• When a valid code has been entered and a programmed value or option is shown int he display, the timeout feature is disabled.

Code 311 Flow Rate Increment
Factory programmed value: 400
Options: 0000 to 9999

This code will allow a program value to be set where the digital display will change from incrementing by 1 to incrementing by 10. The display will increment by 1 at flow rates below the program setting and by 10 at flow rates above the program setting. Settings of this code will not impact flow warnings, flow cutoff settings, or
flow rate display when in the calibration program.

Code 312 Sensor/Tube Size
Factory programmed value: A -.- (–.– = Tube Size)
Options: A, b, c, d, E, F (With Any Tube Size)

This code will allow the flow tester to be programmed for up to six different sensor/tube sizes. Each is identified with a sensor identifying letter (A thru F) and the tube size. The sensor/tube sizes are entered into memory by setting the program slot and doing the calibration procedure. Once the tester is programmed the operator presses the mode button to select a different sensor/tube size. (Note: Tube can refer to pipes, fittings, or other fixtures that the flow sensor may be mounted in.)
Note: Tube size is in inches or millimeters depending on code 313 setting.

Code 313 Flow Rate Units
Options: F1 (GPM); F2 (LPM)
This code will allow the display to show flow rate in GPM or LPM.

Code 315 High Flow Warning
Factory programmed value: 0 (High flow warning is disabled.)
Options: 0001 to 9999
This code will allow the high flow warning to be set. When the flow rate is above the high flow warning program value, the flow display will alternately flash between the flow rate and -HI-.

Code 316 Low Flow Warning
Factory programmed value: 0 (Low flow warning is disabled.)
Options: 0001 to 9999
This code will allow the low flow rate warning to be set. When the flow rate is below the low flow warning program value, the flow display will alternately flash between the flow rate and -LO- .

Code 317 Totalizer Reset
Factory programmed value: YES
Options: YES, no
This code will toggle the flow totalizer reset function on and off. The totalizer reset function has two program settings YES and no. For the reset function to work the totalizer reset is set to YES. Flow total will reset and start from 0 when power is applied to the display module. Flow total will reset to 0 when the TOTAL button is pressed and held. When the totalizer reset is set to no, the flow totals will accumulate and will not reset to 0 even when power is off.

Code 318 Flow Cutoff (Frequency)
Factory programmed value: c 30
Options: 0 to 99.9 Hz
This code allows a cutoff frequency for the flow sensor to be set. There is always some turbulence in the pipe that could cause the flow sensor to turn with the discharge closed. This would cause the display to show a flow rate when there is no true flow. The flow cutoff function is set so that the flow display will show 0 when the signal from the flow sensor is below the programmed value.

Code 319 Flow Cutoff (Flow Rate)
Factory programmed value: c 30
Options: 0 to 999
This code allows a cutoff flow rate for the flow sensor to be set. There is always some turbulence in the pipe that could cause the flow sensor to turn with the discharge closed. This would cause the display to show a flow rate when there is no true flow. The flow cutoff function is set so that the flow display will show 0 when the signal from the flow sensor is below the programmed value.

Code 321 Flow Calibration (Single Point)
Factory programmed value: Precalibrated to Pipe Size
Options: 1 Calibration Point
Refer to Calibration section.

Code 322 Flow Calibration (Multiple Point)
Factory programmed value: No Values Entered
Options: 2 to 10 Calibration Points
This code allows for the display to be calibrated at multiple flow rates. This function should be used when the flow sensor is installed in a difficult plumbing location where flow is not linear. It corrects for nonlinear flow to provide an accurate flow rate display.
Refer to Calibration section.

Error Code E202
An invalid program code has been entered. Re-enter program code when the digital display resets.

Error Code E204
There is no signal from the sensor. This code will only be displayed when in a calibration mode. Troubleshoot the sensor and the associated wiring.

Error Code E206
A selected calibration point is to close to the previous point. (There is less than 5% difference between two calibration points.) Select a different point to continue with the calibration procedure.

Error Code E208
There is a failure with the internal memory of the module. Contact FRC if this error code is displayed.

Exit Program Access Mode
Press both the MODE and TOTAL buttons and hold them there until four dashes are shown in the display. Release the buttons and after 3 seconds the program will return to normal operation.

Enter Sensor/Tube Size
The Portable Flow Tester program allows for up to six different sensor/tube sizes to be set in memory. Each is identified with a sensor identifying letter (A thru F) and the tube size.
Note: Tube can refer to pipes, fittings, or other fixtures that the flow sensor may be mounted in.

The tester is programmed and calibrated at the factory for the sensor(s) and tube(s) it is shipped with.

A sensor/tube size is is programmed into memory by selecting an identifying letter (A thru F) for the sensor, entering the tube size, and doing the calibration procedure. The calibration procedure must be done for each sensor/tube size. If a sensor/tube size had been entered but not calibrated it can not be selected when performing flow test.

1. Place ON/OFF switch to ON the display will flash the sensor/tube size program. After 3 seconds the meter will switch to show 0 GPM.
2. Enter code 312. Result: The display will show the default sensor/tube size.
3. Press the MODE button to select the digit that is to be changed. The digit will flash.
4. Press the TOTAL button to change the digit.
5. Enter the identification letter and tube size. (Unused slots are set at 0.0.)
6. Press both the MODE and TOTAL buttons and hold them until four dashes are shown in the display. Release the buttons and enter a new code or after 3 seconds the program will time out and return to normal operation. Note: All additions or changes in this program require calibration.
7. Perform the calibration procedure for the sensor/tube size.

There are six Sensor/Tube Size program slots. They are identified by a letter and the tube size. Each program is calibrated to be used with a specific sensor and tube. The tube size will be displayed in inches or millimeters depending on code 313 setting. The display format is as follows:

1st - A x.x
2nd - b x.x
3rd - c x.x
4th - d x.x
5th - E x.x
6th - F x.x
(x.x = Tube Size)

CALIBRATION
The Portable Flow Tester is programmed and calibrated at the factory for the tube(s) that it is shipped with. Each new sensor/tube size program that is entered needs to be calibrated. It is recommended that the tester be checked for accuracy annually and recalibrated as necessary. The calibration must be checked for all sensor/tube size programs that are stored in memory. To calibrate the digital flowmeter use a precalibrated water flow test kit or a pitot gauge as a reference.

Notes:
Fully charge the battery before calibrating.
Ensure the flow sensor paddlewheel is clean and the spins freely.
Review the Programming section for details on using the Program Access Mode.

Flow Calibration, Single Point (Code 321)
Calibrate at the most frequently used flow rate or use the guidelines provided by
NFPA 1901. (Refer to Table 2.)

1. Enter code 321.
   Result: The digital display will show the default sensor/tube size program.

2. Press the TOTAL button to change the sensor/tube size program.

3. Press both the MODE and TOTAL buttons and hold them until 0 is shown in the display. Release the buttons.

4. Flow water through the tube at the flow rate selected for the calibration point. Ensure a constant pressure is maintained to obtain a steady flow rate.

5. Adjust the tester displayed flow rate to match the reference flow rate. Use the MODE button to select the digit that is to be changed. The digit will flash. Use the TOTAL button to change the value of the flashing digit.

6. Press both the MODE and TOTAL buttons and hold them until four dashes are shown in the display. Release  the buttons and enter a new code or after 3 seconds the program will time out and return to normal operation.

7. Vary the water flow through the discharge and ensure the displayed flow rate matches the reference. If there are differences at other flow rates the multiple point flow calibration may be necessary.

Flow Calibration, Multiple Point (Code 322)
This function allows for the tester to be calibrated at multiple flow rates. It corrects for nonlinear flow to provide an accurate flow rate display. Select flow rates to calibrate (up to 10 calibration points) that are within the most commonly used flow range.
Note: There must be at least a 5% difference between each calibration point. If a selected calibration point is too close to the previous point an E206 error code will show on the display.

1. Enter code 322.
   Result: The digital display will show the default sensor/tube size program
2. Press the TOTAL button to change the sensor/tube size program.
3. Press both the MODE and TOTAL buttons and hold them until Pt1 is shown in the display. Release the buttons.
   Result: The flowmeter program is ready to set the first calibration point.
4. Flow water through the tube at the flow rate selected for the calibration point. Ensure a constant pressure is maintained to obtain a steady flow rate.
5. Press the MODE button.
   Result: The display will show a flow rate with the last digit flashing.
6. Adjust the displayed flow rate to match the reference flow rate. Use the MODE button to select the digit that is to be changed. The digit will flash. Use the TOTAL button to change the value of the flashing digit.
7. Press both the MODE and TOTAL buttons, release the buttons when the next calibration point is displayed. (If the buttons are pressed too long the program will exit the calibration mode.)
   Result: The display will show Pt2 (or the next calibration point).
8. Repeat steps 4 through 7 for each flow rate to be calibrated.
9. To exit the calibration program:
   Press both the MODE and TOTAL buttons and hold them until four dashes
   are shown in the display. Release the buttons and enter a new code or after 3
   seconds the program will timeout and return to normal operation.

FLOW SENSOR MAINTENANCE
It is recommended that the flow sensor be cleaned during the yearly calibration check.

Depending on the environment that the flow tube is used in, it is possible that mud, grass, algae, or other materials may collect on the paddlewheel of the flow sensor and require it to be cleaned from time to time.

Remove the flow sensor and clean the it with a mild soap and clean water. Make sure the paddlewheel spins freely.

 Remove Flow Sensor

1. Remove retaining nut.
2. Slide flow sensor out of sensor housing.

Install Flow Sensor

1. Insert flow sensor into sensor housing. Align flat spot on sensor rim with alignment tab and make sure o-ring is in groove.
   Note: The retainer cap only needs to be hand tightened. There is an inside lip that will stop the cap from turning when it makes contact with the alignment tab. This provides the correct pressure to make the seal at the o-ring. Make sure the flow sensor does not disengage from the alignment tab and rotate.
2. Install retainer cap and hand tighten.