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STI-QT Fire Sprinkler Shut Off Tool
The STI-QT Fire Sprinkler Shut Off Tool allows easy one-hand operation to stop water flow on ½” and ¾” sprinkler heads. Reusable, lightweight, and durable, it works on many sprinkler types including upright, pendant, sidewall, intact, damaged, recessed, or sheared. Tested up to 350 PSI (2400 KPA).
Manufacturer Resources
Product Specs
- Product Group:
- Safety
- Product Subgroup:
- Parts & Accessories
- Product Type:
- #NAME?
- Department:
- Safety
Safety Technology International STI-QT-ACCESSORIES – Frequently Asked Questions
1) Will the STI-QT shut off tool work on a sprinkler head that's already been sheared off?
Yes. The STI-QT fire sprinkler shut off tool is made to stop flow on heads that are intact, damaged, recessed, or sheared clean off, as well as standard upright, pendant, and sidewall heads. That covers the usual accidental-discharge scenarios, forklift strikes, a head knocked off by scaffolding, or a frozen head that let go.
2) Can one person use the STI-QT alone during a sprinkler discharge?
It's built for one-hand operation, so a single maintenance tech or engineer can plug the head without a second set of hands. That matters when the other hand is holding a ladder and water is coming down at full system pressure.
3) How much water pressure can the STI-QT hold back?
The tool has been tested up to 350 PSI (2400 KPA), which is well above the operating pressure of a typical wet sprinkler system, so it holds on high-rise standpipe-fed floors as well as low-rise buildings.
4) Is the STI-QT a one-time-use plug or can I keep it on the truck?
Reusable. The STI-QT is a reusable, lightweight, durable tool, so it stays in the service truck or on the engineering cart and gets used again on the next incident rather than being discarded after one head.
5) Why use a sprinkler shut off tool instead of just closing the floor control valve?
Closing a control valve takes the whole zone or riser out of service and someone has to get to it, which can mean minutes of uncontrolled flow and a lot of water damage. The STI-QT plugs the single discharging head on the spot so the rest of the system stays in service and protected while the head is replaced. It's the difference between a wet ceiling tile and a flooded floor.
6) How many versions of the STI-QT shut off tool are there?
One. The STI-QT is a single model with no size, finish, or option choices to specify, so there's nothing to select beyond quantity when you stock it across buildings.
How fast can I get the Safety Technology International STI-QT-ACCESSORIES delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Safety Technology International STI-QT-ACCESSORIES come with a warranty?
Absolutely. The Safety Technology International STI-QT-ACCESSORIES is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Safety Technology International STI-QT-ACCESSORIES?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
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