What is a siamese connection used for?
Inspired by the Y-shaped Siamese twins, a Siamese connection is a Y shaped fire department connection with two female inlets through which firefighters can attach two hoses and refill standpipes or sprinkler systems with water. The siamese connection is alternatively called FDC (Fire Department Connection).
What is a Siamese standpipe?
A siamese connection or splitter in fire protection engineering is a pipe fitting that allows two or more fire hoses to be connected to a single standpipe riser at the same general location.
How does a Siamese valve work?
Siamese FDCs will contain either a single or double clapper to channel the flow of water coming into the system. With a single clapper, if one hose is connected, the other side is kept shut by the pressure of the water.
What is the difference between a wye and a Siamese?
What is the difference between a Wye and a Siamese? A wye is an appliance that flows from one line into two. A siamese is an appliance that flows 2 or more lines into one.
What is the difference between a Siamese and gated wye?
Two into one siamese, one into two wye. Gated wye: one female inlet to two or more male outlet. Siamese: two or more male inlet to one female outlet.
What are the 5 types of standpipe systems?
Types of standpipes in combination systems
- Automatic dry standpipe system.
- Automatic wet standpipe system.
- Combined system.
- Manual dry standpipe system.
- Manual wet standpipe system.
- Semiautomatic dry standpipe system.
- Wet standpipe system.
What is a Siamese appliance?
Siamese appliances – consist of two or more hoselines brought into one hose line, typical siamese appliance has two or three female connections coming into the appliance and one male discharge. May be equipped with or without a clapper valve. Commonly used to overcome the problems caused by friction loss in hose lays.
What is a Siamese Wye?
A wye is an appliance that flows from one line into two. A siamese is an appliance that flows 2 or more lines into one. There are several different size wyes & siamese.
What are the three classes of standpipe systems?
Standpipes have three major classifications:
- Class I standpipes serve a 2.5-inch fire hose connection for fire department use.
- Class II standpipes serve a 1.5-inch fire hose connection and are typically found in cabinets.
- Class III standpipes have both connections of Class I and II.
What is a Clappered Siamese?
Used to converge several flows into a single flow, usually in situations where seconds count, a Siamese must be both reliable and intuitive to use. Clappers allow additional lines to be added without interrupting flow.
What is the difference between a gated wye and Siamese?
Gated wye: one female inlet to two or more male outlet. Siamese: two or more male inlet to one female outlet. A 3 inch going to two 1 3/4..a Siamese is 2 smaller diameter hoses going into 1 larger one. Two into one siamese, one into two wye.
Why would you use a gated wye?
Permits complete flow control when a hose line needs to be split into two lines or when two lines are combined into one hose line.
What is the purpose of breeching inlet?
The breeching inlets, usually provided at ground level, are meant for replenishing the water tank.
Which is the best location for a breeching inlet?
Breeching inlet is usually installed outside of the building to boost up the pressure within the fire sprinkler pipelines which supply water from the fire pump of the building.
What is the height requirement for breeching inlet?
The empty mains need to be charged with water through the breeching inlets by fire engines. The dry rising mains should not exceed 60m in height to avoid excessive pumping pressure.
What is breeching inlet for?
An inlet breeching is the point within a dry riser system at which fire and rescue services connect their own water supply. Fire engine access is required within 18 metres of the inlet. These are to be placed somewhere easily accessible in an area that provides safety and convenient building access for firefighters.
What is a Siamese connection in a fire hose?
Inspired by the Y-shaped Siamese twins, a Siamese connection is a Y shaped fire department connection with two female inlets through which firefighters can attach two hoses and refill standpipes or sprinkler systems with water. The siamese connection is alternatively called FDC (Fire Department Connection).
What size is a siamese cable?
The common size of Siamese connections is 2.5 inches. However, 3-inch connections are also found in other states with the 4 and 5-inch connections known as Storz – another connection with parallel functionality to Siamese connection. But Siamese connection is popular in firefighting missions.
What is a Siamese connection?
Standpipe and sprinklers require an adequate domestic water supply to fight raging fires in buildings. If there is insufficient water supply, Siamese connection comes at the rescue as an inlet through which the fire department can supply supplemental water into the fire protection system. We specialize in Siamese connections.
What is the size of a siamese inlet?
These inlets come in different sizes depending on the type of system or hoses they attach to. The common size of Siamese connections is 2.5 inches. However, 3-inch connections are also found in other states with the 4 and 5-inch connections known as Storz – another connection with parallel functionality to Siamese connection.