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Tankless Water Heater Isolation Valve Kit | 3420AB Series | FNPT × FNPT | Lead-Free Brass | 600 WOG Rated
$231.30
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Tankless Water Heater Isolation Valve Kit | 3420AB Series | FNPT × FNPT | Lead-Free Brass | 600 WOG Rated
RWV 3420AB Lead-Free Brass Tankless Water Heater Valve Kits provide reliable shut-off, draining, and safety control for residential and commercial systems. Built from lead-free brass (ASTM B927 C27450), these full-port valves are engineered for long-term performance, easy operation, and safe potable water use.
Key Features & Benefits
- Lead-Free Brass Construction — Certified to NSF/ANSI/CAN 61 & 372 and AB1953 standards for safe drinking water use.
- Full Port ¼-Turn Operation — Ensures unrestricted flow with smooth on/off control and minimal pressure drop.
- Adjustable Packing & Blow-Out Proof Stem — Provides reliable sealing and prevents accidental disassembly under pressure.
- Integral Drain/Purge Valve & Relief Port — Features built-in hose-end drain and relief ports rated for up to 2.7M BTU/hr capacity (3420TAB).
- High Pressure Rating — Rated 600 WOG (non-shock) for dependable performance in both hot and cold water systems.
- Color-Coded Operation — 3421AB (red handle) for hot water and 3422AB (blue handle) for cold water service.
Dimensions & Weight
| Size | Φ [in] | ΦSC [in] | ΦP [in] | A [in] | B [in] | C [in] | H [in] | Weight [lb] |
|---|---|---|---|---|---|---|---|---|
| ¾″ | ¾ – 14 NPT | ¾ – 14 NPT | 0.73 | 4.06 | 2.35 | 1.14 | 1.66 | 1.71 / 1.60* |
| 1″ | 1 – 11.5 NPT | ¾ – 14 NPT | 0.98 | 4.34 | 2.54 | 1.35 | 2.11 | 1.92 / 1.80* |
*3421AB (Hot) / 3422AB (Cold)
Material Composition
| Part | Material | Specification |
|---|---|---|
| Body / Fixed End / Union | Lead-Free Brass | ASTM B927 C27450 |
| Ball | Lead-Free Brass / Chrome Plated | ASTM B927 C27450 |
| Seat / Packing Ring | PTFE | PTFE |
| Packing Nut / Union Nut / Drain Cap | Brass | ASTM B124 / B283 C37700 |
| Handle / T-Handle | Aluminum | ASTM B85 |
| Handle Hardware | Steel / Zinc Plated | ASTM A36 |
| O-Ring / Drain Gasket | EPDM Peroxide | NSF Approved |
| Cap Retainer | Rubber | — |
Applications: Ideal for tankless water heater installations and retrofits—offering isolation, draining, and pressure relief in one compact, lead-free assembly.