The DHST017 Heavy-Duty Fire Nozzle Handheld Shutoff is a critical inline valve designed to provide firefighters with immediate, positive control over water flow directly at the nozzle. Engineered for rugged reliability in high-stress fireground operations, it installs securely between the fire hose and the nozzle. Its robust construction and smooth-operating ball valve mechanism allow responders to instantly start, stop, or throttle water flow with minimal effort using just one hand, enhancing operational safety and effectiveness during fire attack, overhaul, or exposure protection.
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Product Description
Instantaneous Flow Control: Quarter-turn ball valve enables rapid ON/OFF action and precise flow modulation directly at the nozzle point.
Heavy-Duty Construction: Forged brass or bronze body provides exceptional strength, impact resistance, and durability to withstand harsh firefighting conditions and accidental drops.
High-Pressure & Flow Capacity: Rated for standard fire service operating pressures (e.g., 300 PSI+) and compatible with high-flow attack lines (e.g., 1.75" or 2.5" couplings).
Ergonomic Operating Lever: Large, easy-to-grip lever designed for positive operation even with gloved hands, offering excellent tactile feedback.
Smooth Internal Bore: Full-port ball valve design minimizes friction loss, ensuring maximum water delivery efficiency to the nozzle.
Standard Fire Hose Compatibility: Features male (M) and female (F) threaded ends conforming to NFPA standard fire hose threads (NST), ensuring seamless integration with attack lines and nozzles.
Corrosion Resistance: Brass/bronze construction offers good resistance to corrosion from water and typical fireground exposures.
Safety Markings: Clearly labeled "OPEN" and "SHUT" positions for unambiguous operation under stressful conditions.
Direct Fire Attack: Allows nozzle operators to instantly stop water flow without signaling the pump operator, crucial during interior attacks when repositioning, checking for extension, or conserving water.
Exposure Protection: Enables precise control of water application when cooling adjacent structures or fuels.
Overhaul Operations: Facilitates controlled water application for extinguishing deep-seated fires and hotspots without excessive water damage.
Vent-Enter-Isolate-Search (VEIS): Critical tool for rapidly controlling flow when making entry through windows or above fire.
Industrial Firefighting: Essential in complex industrial settings where precise flow control near hazards is paramount.
Municipal & Structural Fire Departments: Standard equipment on attack lines for engines, ladder trucks, and rescue companies.
Wildland Firefighting (when applicable): Can be used on larger diameter wildland attack lines where immediate shutoff is beneficial.
Q: Why use a shutoff at the nozzle instead of relying on the pump panel?
A: It provides immediate, local control for the nozzle operator, eliminating communication delays and allowing instant reaction to changing fire conditions (e.g., need to advance, retreat, check for victims, conserve water). This enhances firefighter safety and tactical flexibility.
Q: What size fire hose is the DHST017 designed for?
A: The DHST017 designation typically corresponds to a shutoff compatible with 1.75-inch fire hose couplings (1.5" NST threads). Confirm the specific model's coupling size (e.g., 1.5", 2.5") with the manufacturer.
Q: Does the shutoff add significant weight or friction loss?
A: While adding some weight, the robust construction is necessary for durability. High-quality full-port ball valves like the DHST017 are designed to minimize friction loss, typically adding less than 5 PSI at rated flows compared to a straight section of hose.
Q: How do I maintain the DHST017 shutoff?
A: Follow manufacturer guidelines. Generally, this involves rinsing with clean water after use, periodic lubrication of the valve stem (if specified), and inspection for damage, leaks, or smooth operation during routine equipment checks. Annual service by qualified personnel is recommended.
Q: Is it compatible with all fire nozzles?
A: Yes, as long as the shutoff's outlet (male) thread matches the inlet (female) thread of the nozzle (typically 1.5" NST for 1.75" hose lines), and the inlet (female) thread of the shutoff matches the hose's male thread. Standardization ensures broad compatibility.
