Watts LFTWHG2-FT-HC-RV Tankless Water Heater Service Valve Kit – 3/4" FNPT, 150 PSI

The Watts LFTWHG2-FT-HC-RV Tankless Water Heater Valve Kit is a professional-grade isolation and service assembly designed for installation and maintenance of gas or electric tankless water heating systems. The kit provides full-port flow control and integrated flushing functionality to facilitate descaling, system isolation, and pressure relief testing without requiring a total system shutdown. Constructed from heavy-duty forged brass and rated for 600 WOG, the assembly ensures reliability and compliance with potable water system standards under continuous operating conditions.

Details

• Manufacturer: Watts
• Model Number: LFTWHG2-FT-HC-RV
• Product Name: Tankless Water Heater Valve Kit with Pressure Relief Valve
• Connection Type: 3/4" FNPT x FNPT (Hot and Cold Isolation Valves)
• Valve Type: Full-port 1/4-turn ball valves with integrated drain ports
• Pressure Relief Valve Rating: 150 PSI / 200,000 BTU
• Maximum Working Pressure: 600 WOG (Water, Oil, Gas)
• Working Temperature Range: 40°F to 180°F (4°C to 82°C)
• Body Material: Forged brass, lead-free construction
• Ball Material: Chrome-plated brass
• Handle Type: Color-coded metal handles (red for hot, blue for cold)
• Drain Valves: Integrated 1/4-turn drain outlets with brass safety caps
• Main Flow Channel: Full-port design for unrestricted flow
• Relief Valve Connection: 3/4" male outlet
• Application Type: Isolation, flushing, and maintenance of tankless water heaters
• Compatibility: Suitable for Rheem, Bosch, Noritz, Rinnai, Takagi, Navien, Stiebel, Atmor, Ecosmart, Eccotemp, Marey, Tempra, and other 3/4" FNPT-configured systems
• Certifications: NSF/ANSI 61, NSF/ANSI 372 (Lead-Free), UPC (Uniform Plumbing Code)
• Compliance: Meets all applicable federal and state lead-free standards for potable water components
• Mounting Orientation: Vertical or horizontal installations as required by system layout

Technical Application

The Watts LFTWHG2-FT-HC-RV kit provides dual isolation and drain functionality for direct connection to tankless water heater inlets and outlets. The 1/4-turn full-port ball valves enable system isolation for maintenance and pressure testing, while the integrated drain ports support descaling or flushing procedures using standard service pump connections. The included 150 PSI pressure relief valve ensures safety compliance for thermal expansion control and system protection. Constructed from forged, lead-free brass and rated for 600 WOG, the assembly supports potable water, hydronic, and general mechanical service systems. Its compact design allows installation in confined utility areas without restricting access for service or inspection.

Specifications

• Connection Size: 3/4" FNPT x FNPT (Hot and Cold Isolation Valves)
• Pressure Relief Valve: 150 PSI / 200,000 BTU
• Working Pressure Rating: 600 WOG
• Operating Temperature Range: 40°F – 180°F (4°C – 82°C)
• Valve Operation: 1/4-turn, full-port
• Drain Ports: Integrated 1/4-turn service valves with brass safety caps
• Body Material: Forged, lead-free brass
• Ball Material: Chrome-plated brass
• Handles: Color-coded (red/hot, blue/cold) for quick identification
• Relief Valve Connection: 3/4" male outlet
• Certifications: NSF/ANSI 61, NSF/ANSI 372, UPC
• Compliance: Lead-free and potable water compliant to U.S. federal and state standards
• Compatibility: Universal fit for most 3/4" tankless water heater systems (gas or electric)
• Flow Characteristics: Full-port design for unrestricted flow and minimal pressure drop
• Safety Features: Integrated pressure relief and drain system to support service and protection

Installation and Service Considerations

Installation should be performed by licensed plumbing professionals in accordance with local codes and the water heater manufacturer’s requirements. Verify correct orientation and sealing of FNPT connections using approved thread sealants. The valves are designed for easy system isolation and service access, enabling descaling and flushing without shutting down the main water supply. Regular inspection of valve operation, seals, and pressure relief discharge line is recommended as part of preventive maintenance.

Summary

The Watts LFTWHG2-FT-HC-RV 3/4" Tankless Water Heater Service Valve Kit provides an integrated isolation, drain, and safety assembly for professional installation and maintenance of tankless water heating systems. Constructed from forged brass and rated for 600 WOG, the kit includes full-port ball valves, a 150 PSI pressure relief valve, and integrated drain outlets for flushing and descaling operations. Certified lead-free and compliant with NSF/ANSI and UPC standards, this assembly supports efficient service access, system protection, and long-term operational reliability in potable water systems.