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3422AB LF Tankless Water Heater Valve Kit
Professional-Grade Control for Tankless Water Heater Cold Supply Lines
Engineered for Reliable Cold Water Service
✔ Instant-identification blue handle ensures correct cold-side installation
✔ Full-port design maximizes flow with minimal pressure drop
✔ 600# WOG rated for water, oil, or gas service (non-shock)
✔ Lead-free brass construction (NSF/ANSI/CAN 61 & 372 certified)
Key Features
- 🔹 Durable Components
- Virgin PTFE seats for smooth operation
- Blow-out proof stem with adjustable packing
- Lead-free brass body (ASTM B927 C27450)
- 🔹 Maintenance-Ready Design
- Integral base drain & purge port with protective cap
- 3/4" relief valve port (select capacity):
- 3420RAB: 200K BTU/hr
- 3420SAB: 500K BTU/hr
- 3420TAB: 2.7M BTU/hr
- 🔹 Professional Connections
- FNPT × FNPT tailpiece (ASME B1.20.1-NPT compliant)
- ¼-turn operation for quick shutoff
Technical Specifications
- Material: Lead-free brass construction
- Pressure Rating: 600 PSI WOG
- Certifications: AB1953, NSF-61, NSF-372
- Handle Color: Blue (cold water service only)
- Port Size: Full port
Why Professionals Choose This Valve
• Color-coded safety: Blue handle prevents installation errors
• Complete system solution: Pairs with 3421AB (red handle) hot valve
• Lead-free compliance: Meets strict potable water standards
• Built to last: PTFE seats and brass construction withstand demanding use
Ideal For:
- Cold supply lines for tankless water heaters
- Commercial and residential plumbing systems
- Applications requiring lead-free compliance
- Order Note: Specify required BTU relief model (RAB/SAB/TAB)
Di m e n s i o n , Weight
| Size | Φ [in] | ΦSC [in] | ΦP [in] | A [in] | B [in] | C [in] | H [in] | Wt.* [lb] |
|---|---|---|---|---|---|---|---|---|
| 3/4" | 3/4 - 14 NPT | 3/4 - 14 NPT | 0.73 | 4.06 | 2.35 | 1.14 | 1.66 | 1.71 / 1.60 |
| 1" | 1 - 11.5 NPT | 3/4 - 14 NPT | 0.98 | 4.34 | 2.54 | 1.35 | 2.11 | 1.92 / 1.80 |
*Weight may vary slightly between models
Material
| Part # | Component | Material Specification |
|---|---|---|
| 1 | Body | Lead Free Brass ASTM B927 C27450 |
| 2 | Fixed end | Lead Free Brass ASTM B927 C27450 |
| 3 | Ball | Lead Free Brass / Cr plated ASTM B927 C27450 |
| 4 | Seat | PTFE PTFE |
| 5 | Stem | Lead Free Brass ASTM B927 C27450 |
| 6 | Packing ring | PTFE PTFE |
| 7 | Packing nut | Brass ASTM B124 C37700 |
| 8 | T-handle | Aluminum ASTM B85 |
| 9 | Handle nut | Steel /Zn plated ASTM A36 |
| 10 | Handle screw | Steel /Zn plated ASTM A36 |
| 11 | Handle | Aluminum ASTM B85 |
| 12 | Stem | Lead Free Brass ASTM B927 C27450 |
| 13 | Union nut | Brass ASTM B283 C37700 |
| 14 | Union | Lead Free Brass ASTM B927 C27450 |
| 15 | O-ring | EPDM Perox NSF approved |
| 16 | Cap retainer | Rubber - |
| 17 | Drain cap | Brass ASTM B283 C37700 |
| 18 | Drain gasket | EPDM Perox NSF approved |
| 19 | Ball | Lead Free Brass / Cr plated ASTM B927 C27450 |
| 20 | Seat | PTFE PTFE |
| 21 | Fixed end | Lead Free Brass ASTM B927 C27450 |