Fire Sprinkler Flow Switch Refill Service Tool

The Original Flow Switch Refill Service Tool

Professional-grade service tool. Designed by PowerBand Printing LLC. Made in Indiana, USA. 

Stop False Alarms the Smarter Way

Ask any sprinkler fitter what they use to block a flow switch during system refill and you'll hear it all: a scrap of cardboard, a washer off the ground, electrical box knockout, pliers wedged where they don’t belong. Quick improvisation is the norm—but it's messy, unreliable, and sometimes triggers alarms anyway.

That’s why we designed the Flow Switch Refill Service Tool—a purpose-built, professional-grade solution that puts control, safety, and reliability in your hands. This tool is specifically designed for a Potter VSR flow switch. Not compatible with other flow switches (yet-stay tuned).

Key Features

• Precision Fit for Potter VSR Flow Switch

Purpose-built to temporarily block the paddle during system refill—no more improvising.

• Failsafe Cover Interlock

Flow switch cover cannot be reinstalled without removing the tool first, helping to ensure the system is never left disabled unintentionally.

• Allen Key Slot

Integrated slot to store the security allen key that is required to remove the cover from the flow switch, so you always know where it is.

• High-Visibility Orange
  

Made from bright orange ABS plastic that stands out among a riser bank to help ensure removal of tool is completed after system is refilled.

Why Pros Prefer It

• No more guesswork with makeshift blocks
• No damage or modification to the flow switch
• Made by a sprinkler fitter, for sprinkler fitters
• Designed and made in USA

Whether you service one system a month or ten a day, this tool brings peace of mind to a chaotic workflow.

Who Should Use It

Certified fire protection professionals, sprinkler technicians, and service personnel familiar with the safe handling of alarm systems. Not intended for consumer use or permanent installation.

Disclaimer of Use and Liability

Use at Your Own Risk

This product is intended solely for use by trained professionals during fire sprinkler system maintenance.
PowerBand Printing LLC does not guarantee compatibility, code compliance, or outcome for any specific application.
Use of this tool is voluntary and done at the user’s own discretion. PowerBand Printing LLC accepts no liability for damage, alarm triggers, injury, or regulatory violations.

This product must be removed prior to returning the system to service. Not affiliated with or endorsed by Potter Electric Signal Company LLC.

Stop improvising. Start servicing smarter.

Order the Flow Switch Refill Service Tool now and upgrade your maintenance workflow with the original solution designed to fit the job—not force it.