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Tyco Fire Products Brand

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12/04 - Customer Bulletin

Engineered Products & Services

Tyco Fire & Building Products
451 N. Cannon Avenue
Lansdale, PA 19446
Phone: (215) 362-0700
Fax: (215) 362-5385
FM Approval for Large Drop Sprinkler on Hold

December 23, 2004

Dear Friends and Valued Customers,

Effective immediately Factory Mutual has declared that all Large Drop sprinkler approvals are on hold. Factory Mutual’s attempt to verify that their new testing facility could reproduce testing criteria for the Large Drop Sprinklers has shown inconsistent results. Factory Mutual feels that further testing must be done to resolve the inconsistencies. This approval “hold” is effective for all manufacturers of Large Drop sprinklers. Manufacturers’ cannot sell Large Drop sprinklers with an FM approval until the approval “hold” has been

For the immediate future, Tyco Fire Products will continue to quarantine the Large Drop sprinklers with the FM approval stamp that are in our inventory and will not manufacture more products with the FM approval stamp. Large Drop sprinklers that have been previously sold, are in distribution, and have been previously installed are not impacted by the FM approval “hold”.

The Tyco Fire Products LD sprinkler is also UL approved. For non-FM insured projects, you can still use the Model LD Large Drop sprinkler on your projects with no repercussions.

The following Tyco Fire Products parts will be affected:

Description Temperature Part Number
LD Large Drop Upright, Brass 155 Degree (F) 50-400-1-155
LD Large Drop Upright, Brass 200 Degree (F) 50-400-1-200
LD Large Drop Upright, Brass 286 Degree (F) 50-400-1-286

Alternative replacement systems to the Large Drop technology are outlined in a separate document (84kb PDF) that can be accessed from either a Tyco Fire Products Regional Sales Representative, or simply visit our web site at

We at Tyco Fire Products apologize for any inconvenience this may cause you, and are committed to keep you informed when further Factory Mutual announcements occur.

Should you have any questions, please contact your Regional Sales Representative. Thank you for your continued support and loyalty.


Jim Brunetti
National Product Manager

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