🔄 Harwil HRQ12D Flow Switch – 1/2" MPT Long Stem, Pilot Duty SPNO

• ✅ Reliable Flow Detection – Ensures accurate water flow monitoring, protecting pumps, heaters, and critical hydronic equipment in pools, spas, water heaters, and boilers.
• 🔧 1/2" MPT Long Stem Design – Male pipe thread for direct inline installation; extended stem for deeper pipe runs and retrofit needs.
• 💪 Durable & Versatile – Built for continuous operation in wet environments. Suitable for commercial and residential water systems.
• 🛡️ Simple Mechanical Operation – Clear on/off actuation for flow control, safety interlocks, and equipment protection. SPNO (Single Pole Normally Open) pilot duty contacts for integration with control panels.

Applications Include:

• 🏊 Pool & spa pump monitoring and protection
• 🔥 Flow interlock for pool heaters and gas-fired equipment
• 💧 Circulator status in boilers and hydronic systems
• 🏢 Water systems in commercial or residential settings

Specifications:

• Connection: 1/2" MPT
• Switch: Pilot Duty SPNO
• Stem: Long stem for deeper insertion (model HRQ12D)
• Actuation: Mechanical paddle type
• Max Working Pressure: Up to 200 PSI (consult product sheet)
• Operating Temp: 32°F – 225°F (0°C – 107°C)
• Electrical: 1/4 HP @ 125/250 VAC (pilot duty)

Installation & Maintenance Tips:

• 📝 Install in a straight pipe section for best accuracy; follow flow direction markings.
• 🧰 Use appropriate thread sealant on MPT connection; check stem clearance inside the pipe.
• 🔍 Regularly inspect for debris and test switch function after installation and seasonally.

Why Choose Harwil?

Harwil is trusted for high-quality, dependable flow switches. The HRQ12D is ideal for pool, spa, and hydronic systems requiring reliable flow detection in challenging environments. 🌊

For additional compatibility or replacement information, refer to your equipment’s manual or contact Harwil technical support.