Harkness fire sprinkler head (similar to Grinnell sprinkler) | Science Museum Group Collection
Tyco SimplexGrinnell on Twitter: "#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" / Twitter
Vintage Grinnell Upright Sprinkler SSU-3 458A FM | eBay
A history of fire sprinklers
1912 Grinnell Model A | Fire sprinkler system, Sprinkler, Fire sprinkler
Grinnell - Vintage 1947 - B47 - Sprinkler Head - 1/2" NPT Brass | eBay
Grinnell Automatic Sprinkler Fire Alarm Bell Complete Works! - Old School Warehouse
The Evolution of Fire Sprinklers: A Timeline of Innovations
GRINNELL Mobile US / Canada / Mexico | Fire Protection Literature
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 Upright Sprinkler Head SSU-2 [Lot of 3] NOS – governmenttransitsurplus.com](https://cdn.shopify.com/s/files/1/0021/6629/2533/products/20220630125126a_1024x1024@2x.jpg?v=1657216926 "Grinnell Upright Sprinkler Head SSU-2 [Lot of 3] NOS – governmenttransitsurplus.com")
Grinnell Upright Sprinkler Head SSU-2 [Lot of 3] NOS – governmenttransitsurplus.com
Grinnell | Fire Alarm Community Wiki | Fandom
5 - The Frederick Grinnell dynasty - The History of Mather & Platt Ltd
Tyco SimplexGrinnell on Twitter: "#TBT to this antique Grinnell fire sprinkler! DYK that Frederick Grinnell patented the first 'sensitive' automatic sprinkler in 1881? https://t.co/iywNXc7sLA" / Twitter
Grinnell fire sprinkler head | Science Museum Group Collection
Grinnell 458A Upright Sprinkler Head 17/32"
5 - The Frederick Grinnell dynasty - The History of Mather & Platt Ltd
![Grinnell Upright Fire Sprinkler Head SSU-3-458 [Lot of 5] NOS – governmenttransitsurplus.com](https://cdn.shopify.com/s/files/1/0021/6629/2533/products/img7348_40661911-0077-4164-ba7c-b10e03627b39_1024x1024@2x.jpg?v=1650386037 "Grinnell Upright Fire Sprinkler Head SSU-3-458 [Lot of 5] NOS – governmenttransitsurplus.com")
Grinnell Upright Fire Sprinkler Head SSU-3-458 [Lot of 5] NOS – governmenttransitsurplus.com
Fire Sprinkler Heads — 1933 Grinnell picker trunk model. Used in duct...
1926 Grinnell B | Fire sprinkler, Fire systems, Fire sprinklers
1930 Grinnell Fire Sprinkler | Fire sprinkler system, Fire sprinkler, Sprinkler
__08466.1664473042.jpg?c=2&imbypass=on&imbypass=on "Grinnell 772-2 Fire Sprinkler Coupling 14 in / 355.6MM T190849 - TEAMEQUIP")
Grinnell 772-2 Fire Sprinkler Coupling 14 in / 355.6MM T190849 - TEAMEQUIP
