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Keep your DWV system running smoothly and free from offensive odors with this Internal Backwater Valve from Watts. Designed for pipes up to 2 inches in diameter, this valve allows air to enter the system and equalize pressure when water drains out. The bronzed and neoprene construction ensures durability and reliable performance. This versatile valve is perfect for both commercial and residential applications, making it an excellent investment for any property. Additionally, pair with Watts Vent Stack Odor Eliminators to help stop offensive odors from entering your home or building. Installing this valve is simple and straightforward, allowing you to complete the task quickly and efficiently. Keep your DWV system working properly while maintaining a pleasant environment with this Internal Backwater Valve from Watts.