| Brand | Unbranded |
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Check the listing for details. Central Air Conditioner Drain Valve Backflow Prevention and Pest Block. Condition: New. Listed at 21.31 USD. Backflow Protection: Avoids sewage backflow during pipe blockages with effective dual isolation. Pest Resistance: Prevents pest intrusion through a double barrier design for enhanced hygiene. Smooth Drainage: Ensures efficient condensate water flow with automatic and unobstructed operation.