Version 1.7 (June 2017)
TSI Flowmeters Ltd.
The  Flowmaster  provides  ow  and  pressure 
measurement functions. One of it’s primary uses is 
for the testing of hydrants. The procedures used for 
testing hydrants vary and depend on individual user 
requirements.
USING YOUR  FLOWMASTER
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Fig. 4.1 Testing an underground hydrant using a 
standpipe. Photographs courtesy of Essex County Fire 
and Rescue Service.
Fig. 4.2 An  example of  a  ow readout and  a residual 
pressure reading. Photograph courtesy of  Laois Fire 
Service.
The principal international standards for hydrant 
testing  are The  JOIFF  Standard;  “Guideline  for  ow 
and pressure testing of hydrants” and NFPA 291; “Fire 
ow testing and marking of hydrants”. The Flowmaster 
is an approved instrument meeting the instrument 
stipulations laid down in The JOIFF Standard and 
simplies  the  measurement  procedures  outlined  in 
NFPA 291. Please refer to these standards for further 
information
An operators guide for static and residual pressure 
measurements and for ow measurements is supplied 
on the following pages. This information is provided for 
guidance only. It is preferential that the Flowmaster user 
follow the guidelines provided by their organisation. A 
copy of The JOIFF Standard is available on request.
Fig. 4.3 Flow testing with ball valve to facilitate static and 
residual pressure measurements at Portlaoise Hospital. 
Photograph courtesy of Portlaoise Hospital Service
Fig. 4.4 Inline use of Flowmaster. Photograph courtesy 
of Essex County Fire and Rescue Service
Fig. 4.5 Flowmaster with ttings for use with Hoselay-
ers. Photograph courtesy of Greater Manchester Fire 
and Rescue Service
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Additional information and video tutorials are available 
online. For demonstrations, click on links below:
• Using the Flowmaster 250 to test a Hydrant
- http://www.youtube.com/
watch?v=8EQOp5E3TJ8
• Using the Flowmaster 250 for Flushing
- http://www.youtube.com/watch?v=Yu8b_
UXd3Mk
• Using the Flowmaster 250 to test a Canadian 
Hydrant (Hetek)
- http://www.youtube.com/watch?v=a19GwFK
kT9w&feature=player_embedded
Other tutorial videos are also available at www.tsi.ie