Version 1.7 (June 2017)
TSI Flowmeters Ltd.
This  portable  ow  and  pressure  test  meter  was 
developed in conjunction with UK and Irish Fire 
Brigades to meet the need for professional and easy 
appraisal of available pressure and ow at the service 
point.
GETTING TO KNOW YOUR FLOWMASTER
The main features of the TSI Flowmaster are:
• Measures static pressure, residual pressure, 
instantaneous ow, total ow
• Fully portable
• Easy to use - simply attach to the re hydrant outlet
• There are no moving parts in the sensor - eliminating 
breakdowns
• Easy to read digital display
• Convenient carrying handle
• Powered by internal, rechargeable battery pack
• Robust and durable
Fig. 1.1 Main components of the Flowmaster
1
4
1.1 INTRODUCTION
The Flowmaster is now used by most UK and Irish 
re services and  has  been  exported to  50  countries. 
The Flowmaster meets the requirements of the JOIFF 
standard, ‘Guideline for the testing of re hydrants.
Our re service customers use the Flowmaster to test 
hydrants  and  re  ghting  equipment  such  as  pumps, 
hoses, dry risers and branches. Customers from the 
water  services  use  the  Flowmaster  when  ushing  to 
regulate  the  ow  rate  and  to  measure  the  volume 
discharged for use in leakage gure calculations.
Internal Battery 
Pack
Connection socket for 
battery charger
On/Off Switch
Data Interface
Supporting Feet
Handle
Outlet BS Inst. Female
Digital Display Flow Rate
Analog Display for 
Pressure
Intake BS Inst. Male
1.2 QUICK START GUIDE
1) Connect to hydrant
2) Turn  ON
3) Open valve
4) Read pressure and ow