Summary: The TFT Tsunami monitor flows up to 8,000 GPM, but your actual output depends on which smooth bore tip you use. The 3-1/2" tip delivers 3,250 GPM at 80 psi, while the 5-1/8" tip pushes up to 7,000 GPM at the same pressure. If you're using the Tsunami monitor, understanding your tip size is critical for matching flow to the fireground need.
What Tip Size Do You Use on an 8000 GPM Firefighting Monitor?
The Tsunami Monitor Uses Stack Tips — Here’s What That Means
If you’re running TFT’s Tsunami 8000 GPM Monitor, the nozzle tip you select will drastically affect how much water you're actually flowing. This monitor is capable of delivering serious volume, but only if the tip matches the task.
In the video, we see two smooth bore stack tips designed for the Tsunami:
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A 3-1/2” tip
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A 5-1/8” tip
These aren't just random sizes — they each come with tested flow capabilities at 80 psi.
Flow Rates by Tip Size
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The 3-1/2” smooth bore provides 3,250 GPM @ 80 psi
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The 5-1/8” smooth bore delivers 7,000 GPM @ 80 psi
That’s more than double the flow depending on which tip you install — and all within the operating range of the Tsunami monitor.
Why These Numbers Matter on the Industrial Fireground
These flow rates aren’t meant for your everyday commercial structure fire. This is industrial firefighting territory — tank farms, chemical storage, and high-hazard flammable liquid incidents.
Being able to control output by simply swapping stack tips gives operators the flexibility to adapt in seconds without reconfiguring the whole setup.
Recap: Choose Based on Water Supply and Fire Need
When operating the Tsunami:
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Use the 3-1/2” tip if you're aiming for more manageable flow with strong reach and control.
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Use the 5-1/8” tip when maximum volume is needed and water supply can support it.
Both operate at 80 psi, and both are built to withstand the kind of punishment that comes with flowing thousands of gallons per minute.
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