3400LAB LF Solder Tankless Water Heater Valve Kit
Engineered for HVAC professionals and contractors, the 3400LAB LF Valve Kit combines solder-end convenience with industrial-grade durability for tankless water heater systems requiring high BTU relief and leak-free performance. Featuring a long-body design and dual relief valve options, this kit simplifies installations in residential and commercial applications while adhering to strict lead-free and safety standards.
Key Features & Benefits
✔️ Solder x FNPT Hybrid Connections – ASME B1.20.1-NPT threaded tailpiece paired with solder ends for seamless integration into copper piping systems.
✔️ Dual Relief Valve Capacity – Choose 200K BTU/hr (3400LRAB) or 500K BTU/hr (3400LSAB) to match system demands.
✔️ 600 PSI WOG Rating – Full-port design with virgin PTFE seats ensures maximum flow and durability in water, oil, or gas applications.
✔️ Long-Body Design – Extra space for easier installation and maintenance access in tight configurations.
✔️ AB1953 & NSF-61/372 Certified – Meets California’s lead-free mandates and North American potable water safety standards.
Technical Specifications
- Connections: Solder x FNPT (ASME B1.20.1-NPT)
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Relief Valve Options:
- 3400LRAB: 200K BTU/hr
- 3400LSAB: 500K BTU/hr
- Materials: Lead-free brass, PTFE seats
- Pressure Rating: 600 PSI WOG (non-shock)
- Operation: ¼-turn with blow-out-proof stem
- Standards: NSF/ANSI/CAN 61, NSF-372, AB1953
Why Choose This Kit?
- Flexible BTU Relief – Supports both residential (200K BTU) and mid-scale commercial (500K BTU) tankless systems.
- Solder-End Reliability – Ideal for permanent, leak-resistant copper pipe installations.
- Integrated Maintenance Ports – Built-in drain and purge cap streamline system flushing and air removal.
- Adjustable Packing – Extends service life with user-friendly maintenance.
Ideal Applications
- High-efficiency residential tankless water heaters
- Commercial kitchens and laundromats
- Hydronic heating systems with copper piping
- Solar thermal storage installations
- Retrofit projects requiring solder compatibility
Built for Performance & Compliance
✅ Industrial-Grade Materials – Lead-free brass and corrosion-resistant components.
✅ Code-Ready Design – Exceeds NSF, AB1953, and ASME standards.
✅ Contractor-Approved – Pre-assembled kit reduces installation time by 25%.
Engineered for Longevity – Trusted in systems where solder joints and high BTU loads are non-negotiable.
Solder-Ready | Dual BTU Relief | Lead-Free