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The AO Smith 100320381 is an O-ring specifically designed for tankless gas water heaters. This oval O-ring is made from NBR, also known as Nitrile Butadiene Rubber. It is recognized for high resistance to oils, fuels, and other chemicals. The O-ring provides a secure seal in the water heater system, effectively preventing gas and water leaks. This enhances the efficiency and reliability of the water heater.
The O-ring is essential for maintaining optimal performance of tankless gas water heaters.
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