You have no items in your shopping cart.
FREE SHIPPING ON ORDERS OVER 99 USD
NEED HELP? (855) 757-7901

Flow Switches

A water flow detector is an electro-mechanical device designed to send an alarm to a fire alarm panel and/or fire department when a continuous flow of water occurs through the fire sprinkler system's piping from an activated sprinkler head or leak in the system.

View as Grid List
Sort by
Display per page

1" Waterflow Alarm Switch with Retard

SKU# 4684
The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. The VSR may also be used as a sectional waterflow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.
$147.15

2" Waterflow Alarm Switch with Retard

SKU# 4669
The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. The VSR may also be used as a sectional waterflow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.
$158.98

2-1/2" Waterflow Alarm Switch with Retard

SKU# 4522
The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. The VSR may also be used as a sectional waterflow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.
$158.98

3" Waterflow Alarm Switch with Retard

SKU# 4864
The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. The VSR may also be used as a sectional waterflow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.
$158.98

4" Waterflow Alarm Switch with Retard

SKU# 4739
The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. The VSR may also be used as a sectional waterflow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.
$158.98

5" Waterflow Alarm Switch with Retard

SKU# 4754
The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. The VSR may also be used as a sectional waterflow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.
$163.52

6" Waterflow Alarm Switch with Retard

SKU# 4518
The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. The VSR may also be used as a sectional waterflow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.
$127.71

2" Yoke Valve Supervisory Switch and Outside Screw

SKU# 4595
The OSYSU is used to monitor the open position of an OS&Y (outside screw and yoke) type gate valve.
$111.82