Zurn Weathermatic SLFSI-T PVC Flow Sensor (Wired) - SLFSI-T10
The Weathermatic SLFSI-T PVC tee-mounted flow sensor delivers reliable, serviceable flow measurement for irrigation systems that use SmartLink Flow. Designed to wire directly to the SmartLink Flow Aircard, the SLFSI-T provides digital pulse output for leak detection, zone-level monitoring, and automatic shutdown when predefined flow limits are exceeded.
Available in 1", 1-1/2", and 2" slip-type tee models (SLFSI-T10, SLFSI-T15, SLFSI-T20). The SLFSI-T is ideal for new installations and retrofits where dependable flow monitoring, early leak detection, and straightforward maintenance are required.
Features
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Exact compatibility: Works with SmartLink Flow Aircard for web-based flow management and alerts.
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Proven performance: 0.25 to 15 FPS flow range; tested to 240 PSI maximum working pressure.
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Serviceable design: Threaded retaining nut and removable electronics housing allow in-field servicing without special tools.
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Durable materials: Rigid PVC tee body, HDPE four-blade impeller, tungsten-carbide shaft, and Buna-N O-ring for long life.
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Installation guidance: Requires minimum 10 diameters upstream and 5 diameters downstream for accurate measurement; housing needs ~4 inches clearance for removal.
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Electrical: Two #18 AWG direct burial leads, 48-inch length; signal can travel up to 2000 feet with proper twisted-shielded cable.
What our Experts Think
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Accurate irrigation flow monitoring: The Zurn Weathermatic SLFSI-T PVC Flow Sensor (Wired) SLFSI-T10 is designed for precise, real-time flow measurement in irrigation systems using SmartLink control platforms.
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Built for SmartLink integration: Works directly with the SmartLink Flow Aircard, enabling automated leak detection, zone monitoring, and system shutdown when abnormal flow is detected.
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High-precision impeller design: Uses a 4-blade HDPE impeller with tungsten-carbide shaft for sensitive, low-flow detection and long-term durability.
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Durable PVC tee construction: Molded PVC body ensures consistent internal geometry for stable readings and reliable performance in buried irrigation installations.
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Service-friendly build: Threaded retaining nut and removable sensor housing allow fast in-field servicing without cutting into the pipe.
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Long-distance wiring capability: Two-wire digital output supports runs up to ~2,000 ft with proper shielded cable, making it suitable for large landscapes and commercial sites.
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Professional irrigation standard: Widely used in commercial and municipal irrigation systems where accurate flow tracking and water loss prevention are critical.
Q&A
Q: What is the Zurn Weathermatic SLFSI-T PVC Flow Sensor (Wired) SLFSI-T10 used for?
A: It measures real-time water flow in irrigation systems to help detect leaks, pipe breaks, and abnormal water usage.
Q: How does the SLFSI-T10 work?
A: It uses a wired signal to send flow data to a compatible irrigation controller, enabling precise flow monitoring and control.
Q: What are key features of this flow sensor?
A: PVC body construction, in-line installation, high-accuracy turbine design, and compatibility with Weathermatic SmartLine controllers.
Q: What does it help prevent?
A: Water waste, system damage, and landscape loss by identifying leaks or broken irrigation zones early.
Q: Where is it typically installed?
A: Commercial irrigation systems, sports fields, parks, and large landscape irrigation networks.
Q: Does it require calibration or maintenance?
A: Minimal maintenance is needed, but proper installation and periodic inspection ensure accurate flow readings over time.
Maintenance Tips
- Inspect sensor and wiring regularly for damage, corrosion, or loose connections.
- Keep the flow sensor clean and free of debris buildup for accurate readings.
- Verify calibration and system readings periodically for proper irrigation control performance.
- Flush the irrigation line if sediment or blockages affect sensor accuracy.
- Ensure secure mounting and proper alignment in the PVC line to maintain measurement precision.
- Protect wiring and connections from moisture intrusion and physical damage.
Damage 
Loss 
Theft 
