Exposed FDC | Angled | Double Clapper | Auto Spkr | 4 in. x 2-1/2 in. x 2-1/2 in. NST | Cast Brass

Exposed FDC | Angled | Double Clapper | Auto Spkr | 4 in. x 2-1/2 in. x 2-1/2 in. NST | Cast Brass

This Exposed FDC features an Angled design and is made of a durable, long-lasting Cast Brass to help ensure safety in buildings with automatic sprinkler systems in the event of a fire, by allowing the fire department to supply additional water and/or pressure to enhance the effectiveness of the system. Featuring a Double Clapper design and a Cast Brass finish, this fire protection FDC features ‘Auto Spkr’ lettering and is UL Listed and FM Approved. This Siamese fire hose connection has one 4 in. National Pipe Thread (NPT) outlet and two 2-1/2 in. National Standard Thread (NST) inlets and has been tested to handle up to 500 Gallons Per Minute (GPM).

FDC (Fire Department Connection) Auto Spkr Finish, Sizing, Clapper, and More Options

We provide a variety of Exposed FDC options to fit your needs and preferences, including a variety of orientations, thread types, sizes, finishes, and more:

Angled Body Double Clapper 4 in. x 2-1/2 in. NST (Cast Brass, Polished Brass, Cast Chrome, Polished Chrome), Thread Options Available Upon Request

Angled Body Single Clapper 4 in. x 2-1/2 in. NST (Cast Brass, Cast Chrome), Thread Options Available Upon Request

Angled Body Double Clapper 4 in. x 3 in. NYFD (Cast Brass, Cast Chrome, Polished Chrome), NST Available Upon Request

Straight Body Double Clapper 4 in. x 2-1/2 in. NST (Cast Brass, Polished Brass, Polished Chrome), Thread Options Available Upon Request

Straight Body Single Clapper 4 in. x 2-1/2 in. NST (Cast Brass, Polished Brass, Cast Chrome, Polished Chrome), Thread Options Available Upon Request

Straight Body Double Clapper 4 in. x 3 in. NYFD (Cast Brass, Cast Chrome, Polished Chrome), NST Available Upon Request

Bodies specifically designed for Standpipe systems may be available upon request.

We highly recommend purchasing the add-on parts necessary for a fully functioning and compliant FDC. Choose your plate, and two Plug and Chains or Breakable Caps from the options section on this page to help ensure your building’s safety and code compliance. The ID plates help the fire department identify the location and type of your FDC. The choice between plug and chain systems and breakable caps for FDC protection depends on factors such as local fire codes, system design, and personal preference. Both options offer protection against debris and maintain the cleanliness of the FDCs. Plug and chain systems provide a reusable and visible covering, while breakable caps offer a quick and straightforward way to access the FDCs during emergencies.

What is a Fire Department Connection (FDC)?

FDC stands for Fire Department Connection. An FDC, or, when it has two outlets, a Siamese Connection, or a fire department Siamese connection, is a crucial component of a building's fire protection system. It serves as a dedicated connection point that allows firefighters to easily connect their hoses to the building's fire sprinkler or standpipe system. The FDC enables the fire department to supply additional water or pressure to enhance the effectiveness of fire suppression efforts. It acts as a vital link between the fire department's equipment and the building's fire protection infrastructure, enabling a rapid and coordinated response in the event of a fire emergency.

What is a Siamese Connection?

A Siamese connection, also known as a Siamese fire hose connection or Siamese FDC, is a type of fire department connection (FDC) used in fire protection systems. It is called "Siamese" due to its resemblance to the letter "Y" in shape. The Siamese connection is typically found on the exterior of a building and is used to consolidate multiple fire department hoses into a single supply line. The Siamese connection features two or more inlets that can be connected to fire department hoses, allowing firefighters to supply water from separate sources. These sources can include fire engines, hydrants, or other water supplies. The connection then merges the water streams into a single outlet, which is connected to the building's fire protection system, such as fire sprinklers or standpipes.