- All-Threaded FNPT x FNPT — Leak-free, solderless brass connections for high-pressure installations.
- 200K / 500K BTU Relief Options — Suitable for residential and commercial tankless systems.
- Long-Body Design — Easier access and service in tight installations or outdoor housings.
- 600 PSI WOG + AB1953 Compliant — High-pressure performance with certified lead-free safety.
- Color-Coded Handles — Red for hot (3421LAB) and blue for cold (3422AB) identification.
Sale!
Tankless Water Heater Isolation Valve Kit | 3420LAB LF | ¾” FNPT
Original price was: $123.80.$78.64Current price is: $78.64.
96 in stock
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