Product Overview and Operating Principles
The Giacomini A111 is an end-outlet forged brass manifold engineered for fire protection systems. It operates as an auxiliary inlet connection to supplement the primary water supply, as a roof outlet connection for Class I and Class III standpipe services, or as a fire pump test header.
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Inlet connection use: Bodies do not come equipped with integral clappers. Separate A91C clapper snoots must be installed on the inlets when configured as a fire department inlet connection.
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Roof outlet service: Supplies fire department hose lines with a minimum delivery capacity of 250 GPM per outlet, controlled either locally with attached angle/straight hose valves or by external remote control means.
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Pump test header service: Facilitates high-volume water discharge through multiple hoses during mandatory fire pump flow testing.
Technical Specifications
|
Parameter |
Specification |
|---|---|
|
Rated Working Pressure |
300 PSI (20.6 bar) |
|
Body Material |
Forged brass CuZn40Pb2 (EN 12165 CW617N / ASTM B124 C37700) |
|
Material Yield Stress |
360 MPa (in bar form) |
|
Permanent Distortion Stress R(0.2) |
138 MPa |
|
Elongation |
10% |
|
Finishing |
Rough brass |
|
Inlet Thread Type |
3" Female NPT |
|
Outlet Thread Type |
6" or 8" Female NPT (8" uses 6" body with 6" x 8" adapter) |
|
Inlet Configurations |
3-way, 4-way, or 6-way |
Dimensional Data
Dimensions for Giacomini A111 clapper snoot type end outlet bodies with female-by-female NPT connections:
|
Model Size |
Length A |
Height B |
Body Diameter C |
Port Spacing D |
|---|---|---|---|---|
|
6" NPT x 3" NPT (3-Way) |
23-23/64" |
8-11/32" |
7-21/64" |
7" |
|
6" NPT x 3" NPT (4-Way) |
30-23/64" |
8-11/32" |
7-21/64" |
7" |
|
6" NPT x 3" NPT (6-Way) |
44-23/64" |
8-11/32" |
7-21/64" |
7" |
|
8" NPT x 3" NPT (6-Way) |
Configured via 6" body with 6" x 8" adapter |
8-11/32" |
7-21/64" |
7" |
System Installation and Setup Requirements
Installation must be carried out by qualified fire protection personnel in accordance with national and local fire protection regulations, standard engineering practices, and applicable piping codes.
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Verify that the manifold body and thread dimensions match the approved fire system riser and piping design drawings.
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Connect the discharge piping to the female NPT end outlet (6" or 8" adapted).
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When installing for fire department auxiliary water supply inlet use, thread Giacomini A91C clapper snoots onto each 3" female NPT inlet port.
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When installing as a roof outlet manifold or pump test header, mount compatible angle or straight pattern hose valves directly to each 3" NPT port, or connect remote control valves upstream.
Care, Maintenance, and Testing
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Conduct routine inspections of rough brass bodies and threaded ports for physical damage, corrosion, or foreign debris.
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Inspect auxiliary clapper snoots (A91C) or attached hose valves to ensure clappers swing freely and internal seals seat tightly.
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Verify thread integrity on inlets and outlets prior to hose attachment during routine fire pump flow tests or standpipe flow verifications.
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References
- User Manualmanual.tools