Tankless Water Heater Isolation Valve Kit | 3420LAB Series | FNPT × FNPT | Long Body | Lead-Free Brass | 600 WOG

Tankless Water Heater Isolation Valve Kit | 3420LAB Series | FNPT × FNPT | Long Body | Lead-Free Brass | 600 WOG

RWV 3420LAB Lead-Free Brass Isolation Valve Kits provide safe and reliable water control for tankless water heaters in residential and commercial installations. Designed with a long-body configuration, these valves make servicing easier while maintaining full compliance with modern plumbing and safety codes.

Key Features & Benefits

• Lead-Free Brass Construction — Certified to AB1953 and NSF/ANSI/CAN 61 & 372 standards, ensuring potable water safety with less than 0.25% lead content.
• Full Port ¼-Turn Design — Provides unrestricted flow and quick shut-off capability for easy service and isolation.
• High-Pressure Rated — 600 WOG (non-shock) operating pressure and 15°F to 160°F temperature range for dependable performance.
• Integrated Drain & Relief Port — Includes hose-end purge valve and ¾″ relief connection with selectable capacities (200K / 500K / 2.7M BTU/hr).
• Long-Body Design — Offers extra clearance and easy access during installation or maintenance in tight mechanical spaces.
• Color-Coded Operation — 3421LAB (red handle) for hot water and 3422AB (blue handle) for cold water service.

Dimensions & Weight

*3421LAB (Hot) / 3422AB (Cold)

Material Composition

Applications: Ideal for both new installations and retrofits of tankless water heaters—providing isolation, draining, and safety relief functions in a single, long-body valve kit.