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The Lennox 10M24 is a genuine OEM 3/4" SMV Series bar-stock service valve engineered for durable, leak-free refrigerant line control in Lennox air conditioning and heat pump systems. Bar-stock construction provides superior strength and longevity compared to standard cast valves, making this an ideal choice for high-reliability applications. If your existing service valve is leaking, difficult to operate, or no longer sealing properly, this direct OEM Lennox replacement restores full refrigerant circuit integrity and serviceability on compatible 3/4" line applications.