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The Girard 2GWH-2 is a metal gas valve built for Girard's tankless water heater systems, giving you a proper replacement part when the original valve fails or needs service.
It's a two-port design with 1/2" NPT threaded connections, matching the factory fitment on the systems it's designed for.
Keep one on hand if you rely on a Girard tankless water heater and want to avoid downtime waiting on parts.