Utica-Dunkirk 252-2-2.00 Gasket 320735-701 The Armstrong B2721 is a

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Utica-Dunkirk 252-2-2.00 Gasket 320735-701 The Armstrong B2721 is aThe Utica Dunkirk 252 2 2. 00 Gasket is a critical OEM combustion seal engineered specifically for residential and commercial hydronic applications. Designed as a high heat tankless heater insert gasket, this component ensures a gas tight seal between the heat exchanger and the burner mounting plate. Field technicians frequently utilize the 252 2 2. 00 to prevent flue gas bypass and maintain optimal manifold pressure in Utica and Dunkirk boilers. Its