Hose Monster INPN1.75 User manual

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USER GUIDE
Item#: INPN2, INPN1.75, INPN1.125, INPNK
OVERVIEW
The In-line Pitotless Nozzle can be used for: stairwell standpipe flow testing, pressure reducing valve flow
testing, fire pump flow testing, fire flow testing of hydrants, or as an in-line flow meter for fire pumps. The
device connects to 2 ½” outlets. Hose or piping can be attached downstream of the unit without affecting the
accuracy of the readings. The In-Line Pitotless Nozzle determines flow-rate by measuring the differential
pressure between the two gauge ports.
COMPONENTS (INCLUDED IN KIT)
1) Line Gauge. 0-200 psi, 2 1/2" dial, 1% full scale accuracy rated.
2) Pitotless Nozzle™ Threaded. Sizes: 1⅛”, 1 ¾”, or 2”.
3) Differential Chamber. 2 ½” NH Female Swivel x 11”.
4) Differential Gauge. ½% full scale accuracy rated; 0-100 PSI.
5) Gauge Tubes. Two 12” tubes w/ push-to-connect tube fittings and male quick disconnects.
6) Discharge Valve. 2 ½” NH Slow close valve for controlling water discharge. Included in kit.
OPTIONAL ACCESSORIES (NOT INCLUDED)
7) 2 ½” Stream Shapers. To minimize hose-burn.
8) 30° or 45° Elbows. To angle the hose or the In-line Pitotless Nozzle to meet job conditions.
9) Spanner Wrench. To tighten swivel couplings.

2
OPERATION
1) Insert and secure the Line Gauge threads into the inlet of the Pitotless Nozzle Threaded.
2) Insert and secure the threaded outlet of the Pitotless Nozzle into the swivel coupling of the differential chamber.
Line up the gauge ports of the differential chamber and Pitotless Nozzle so that they are parallel to each other.
3) Attach the discharge valve to the outlet-end (downstream-end) of the In-Line Pitotless Nozzle. Close the
discharge valve.
4) Secure the female swivel coupling of the In-line Pitotless Nozzle assembly to the water source. You can attach
the unit to a 2 ½” valve, a valve larger than 2 ½” by using adapters, or the end of a secured hose.
5) Attach the two gauge tubes to the differential gauge by inserting the free tube-ends into the push-to-connect
tube fittings on the differential gauge.
6) Attach the opposite ends of the gauge tubes to their respective gauge port connections on the differential
chamber and the Pitotless Nozzle. Connect the “High Pressure” side to the Pitotless Nozzle. Connect the “Low
Pressure” side to the differential chamber. Rotate the In-line Pitotless Nozzle so that the differential gauge can
be viewed easily.
7) Before flowing water verify that the discharge valve is fully closed and all connections are fastened securely. Any
leakage can affect readings. Slowly open the water source when ready. Allow the differential chamber to
completely fill with water and become pressurized.
8) Slowly open the discharge valve to the desired flow rate or to fully open. The differential gauge displays the
differential pressure. Use the appropriate flow chart to convert the pressure reading (psi) to flow-rate (GPM).
9) When the test is complete, close the water source and the discharge valve.
Note: All connections in this assembly must be water-tight. Any leakage can affect readings.
FLOW CHARTS
Verify the correct flow chart is used. It should have the correct size and the “In-line Pitotless Nozzle” logo in the
title. Additional copies are available at: www.HoseMonster.com/literature.html. The pressure readings on the
chart are in net psi. Net psi, also known as differential pressure, is the difference between the upstream
pressure and the downstream pressure.
MAINTENANCE
The female quick disconnect fittings. Apply lubricant or WD-40 for stainless steel or brass fittings as necessary
to prevent corrosion, and then wipe down with a cloth. The gauge port on the Pitotless Nozzle and differential
chamber are assembled with a ¼” nipple and a female quick disconnect coupling. The female quick disconnect
coupling can be removed, but the ¼” nipple cannot. Use a hold-back when changing out the female quick
disconnect coupling. Apply thread tape (not thread-locking sealant) on the male end of the nipple to re-install
the female quick disconnect coupling. Contact Hydro Flow Products, Inc. customer service if repair is needed.
Differential Gauge. For operation and battery replacement information, refer to the manufacturer’s
instructions, which are included and on the back-side of the unit. This gauge is not field serviceable. Calibration
to NIST standard is available through Hydro Flow Products. Contact HFP if service is needed.
The Line Gauge. It is recommended that analog gauges be certified and calibrated annually. Calibration to NIST
standard is available through us. Contact Hydro Flow Products, Inc. if service is needed.
Pitotless Nozzle and Differential Chamber. Wipe down the product with a damp rag after each use to remove
dirt and debris.

3
TIPS
The In-Line Pitotless Nozzle can be discharged directly to open atmosphere without a hose downstream of the
unit. The accuracy will not be affected and the flow chart will still be the same. In this case the discharge valve
must be used and unit properly secured. Direct discharge away from people or property.
If you are discharging to hose, attach a 2 ½” Stream Shaper to the downstream end of the discharge valve. This
will minimize hose burn.
The In-Line Pitotless Nozzle can be attached between hoses; however, to prevent hose-end-whip, the discharge
hose end must be secured or used with a Hose Monster®.
When flowing from fixed valves (standpipes, pump test header, etc.) consider using 30° or 45° Elbows in order to
change the discharge angle. Item#: EL302HNH, EL452HNH
IN-LINE PITOTLESS NOZZLE FLOW RANGES
Pitotless Nozzle Size
Flow Range
Part Number
1 ⅛”
94 –321 GPM
PN1.125THD
1 ¾”
250 –1000 GPM
PN1.75THD
2”
500 –1432 GPM
PN2THD
SAFETY AND HANDLING
CAUTION: ALL CONNECTIONS IN THIS ASSEMBLY MUST BE ATTACHED SECURELY. DIRECT WATER DISCHARGE
AWAY FROM ANY PEOPLE OR PROPERTY THAT MAY BE AFFECTED. DO NOT ATTACH THE IN-LINE PITOTLESS
NOZZLE TO THE END OF A HOSE UNLESS A HOSE MONSTER IS ATTACHED TO IT OR UNLESS THE HOSE IS
PROPERLY SECURED. THE USE OF THIS PRODUCT INVOLVES HEAVY WATER FLOW WHICH CAN RESULT IN
SERIOUS INJURY OR DEATH IF USED IMPROPERLY. PRODUCTS THAT HAVE BEEN ALTERED OR MODIFIED IN ANY
WAY POSE A SAFETY RISK AND WILL VOID THE MANUFACTURER’S WARRANTY. THE MANUFACTURER AND ITS
DISTRIBUTORS ARE NOT RESPONSIBLE FOR ANY DAMAGE OR INJURY CAUSED BY THE USE OF THIS PRODUCT.
Made in the USA.
© 2017 The Hose Monster Company. All rights reserved.