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Tyco SimplexGrinnell on X: "#TBT to these four vintage Grinnell Duraspeed brass fire sprinkler heads. Did you know we pioneered the first automatic sprinkler in 1881? https://t.co/Fqubi1mqep" / X

Collecting Fire Sprinkler Heads - 325° Grinnell Quartzoid upright with manual pull tab. Special purpose head combining a standard automatic sprinkler with a mechanical release tab which can be remotely operated by

Grinnell 'Duraspeed' soldered fire sprinkler head | Science Museum Group Collection

ANTIQUE VINTAGE GRINNELL 1914 155 "A" FRAME BRASS FIRE SPRINKLER HEAD | eBay

1966 Grinnell Quartzoid Upright Fire Sprinkler Head | eBay

original and intact vintage american industrial grinnell company "automatic sprinkler" exterior building facade alarm bell with distressed red paint finish

This is me working on old Grinnell Fire Sprinkler Dry Pipe… | Flickr

Grinnell Automatic Sprinkler Fire Alarm Bell Complete Works! - Old School Warehouse

Fire Sprinkler Wooden Spare Head Box, Wrench, Seven Grinnell Heads dated 1915 | Fire sprinkler, Fire protection, Fire

Fire Sprinkler Heads — 1933 Grinnell picker trunk model. Used in duct...

ANTIQUE VINTAGE GRINNELL 1910 155 "A" FRAME BRASS FIRE SPRINKLER HEAD | eBay

Grinnell A SSU 22S2 Fire Sprinkler Head Upright 1/2'' NPT Lot of 2 – BME Bearings and Surplus

Grinnell Upright Fire Sprinkler Head SSU-3-458 [Lot of 5] NOS – governmenttransitsurplus.com

1926 Grinnell B | Fire sprinkler, Fire systems, Fire sprinklers

Grinnell quartzoid bulb sprinkler, 1927 | Science Museum Group Collection

GRINNELL Fire Sprinkler Heads for sale | eBay

Grinnell automatic sprinkler head - APH Museum

Grinnell type C fire sprinkler head | Science Museum Group Collection

NFSA on Twitter: "#FastestwaterFriday Fact: 1881; Frederick Grinnell patents his #firesprinkler system. The 'Grinnell Sprinkler' later went on to be considered the first practical automated sprinkler system. https://t.co/2q4pBE5R3B" / Twitter

File:Grinnell automatic sprinkler advertisement.png - Wikimedia Commons

Manufacturer: Grinnell, 1882 | Fire sprinkler system, Fire protection, Fire sprinkler

Grinnell - Vintage 1947 - B47 - 165 - Sprinkler Head 1/2" NPT Brass - Lot of 10 | eBay