3420RAB/TAB LF Tankless Water Heater Valve Kit
Engineered for commercial and industrial tankless water heaters, the 3420RAB/TAB LF Valve Kit combines NSF-61/372 certifications with a robust 600# WOG rating to deliver unmatched reliability in high-pressure hydronic systems. Featuring virgin PTFE seats and scalable relief valve configurations, this kit ensures safe, leak-free performance in potable water and heating applications.
Key Features & Benefits
✔️ Scalable Relief Capacity – Choose 200K (RAB), 500K (SAB), or 2.7M BTU/hr (TAB) relief valves to match system demands.
✔️ NSF-61/372 & AB1953 Compliant – Certified for low-lead safety in drinking water systems and California lead-free standards.
✔️ 600# WOG Pressure Rating – Withstands extreme non-shock pressures for industrial-grade durability.
✔️ ¼-Turn Operation & Blow-Out Proof Stem – Smooth, reliable control with maintenance-free sealing (virgin PTFE seats).
✔️ Integrated Maintenance Ports – Built-in base drains and purge ports simplify air removal and system flushing.
Technical Specifications
- Connections: 3/4" FNPT x FNPT (ASME B1.20.1-NPT)
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Relief Valve Options:
- 3420RAB: 200K BTU/hr
- 3420SAB: 500K BTU/hr
- 3420TAB: 2.7M BTU/hr
- Materials: Lead-free brass, Virgin PTFE seats
- Pressure Rating: 600 PSI WOG (non-shock)
- Standards: NSF/ANSI/CAN 61, NSF-372, AB1953
Why Choose the 3420RAB/TAB LF Kit?
- Industrial-Grade Build: Full-port design and adjustable packing ensure minimal flow restriction and long-term seal integrity.
- Zero Contamination: PTFE seats resist chemical degradation, ideal for potable water or corrosive media.
- Future-Ready Flexibility: Upgrade relief capacity without replacing the entire valve assembly.
Ideal Applications
- Commercial tankless water heaters
- High-pressure hydronic heating loops
- Industrial process water systems
- Solar thermal installations with glycol solutions
- Municipal water treatment plants
Built for Compliance & Performance
✅ Dual NSF Certification – Safe for drinking water and low-lead compliance.
✅ 600 PSI Resilience – Handles pressure surges in large-scale systems.
✅ Installation-Ready Design – Pre-assembled with integral drains for reduced labor time.
Engineered for Professionals – Trusted by HVAC contractors for code adherence and critical system safety.