for the installation, operation and maintenance of fire hydrants.


Assured Flow’s brilliant safety-orange poly bags are designed to give firefighters a quick, visible reference that a fire hydrant is temporarily out of service.

Purveyors of Water Service have been held liable for property damage when hydrants failed to operate in emergency situations. PROTECT YOURSELF!

Assured Flow Sales, Inc. has developed an economical method to identify hydrants not functioning properly. N.I.S. (Not in Service) Poly Bags can be installed within a matter of seconds and will stay firmly attached to a hydrant not functioning properly.

Specifications – New Construction

All fire hydrants that have yet to be approved for use must be covered and identified as being “Not in Service”. Identification bags shall be N.I.S. Bags manufactured of 4 mil. Polypropylene material, bright orange in color and bold print clearly showing “NOT IN SERVICE”. Tie straps shall be provided to firmly secure bags to hydrant.

Also available: NIS Rings and NIS Tags


  • Pouches of 8
  • Cases of 96

Assured Flow Sales, Inc. warrants that all of it’s product are free of defects in material and workmanship. Assured Flow Sales, Inc. will replace at no charge any of it’s new products found to be defective within one year of the date of purchase from Assured Flow Sales, Inc. Assured Flow Sales, Inc. shall not be liable for any loss, damage or injury, direct or consequential arising out of the use of or the inability to use the product. Before using any product the user of the product shall determine the suitability of the product for it’s intended use and assumes all risk and liability. No claims for labor or consequential damage will be accepted.


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