QB-KIT1 Drain Plug Kit | Window AC Drain Plug Replacement | Fix Leaking Window Air Conditioner & Mini Split Units

Stop your window air conditioner from leaking water with this  QB-KIT1 Drain Plug Kit, a simple and effective solution for restoring proper drainage in window AC units, mini splits, and HVAC systems.

This drain plug is commonly used in window air conditioners and ductless systems to seal unused drain openings and control condensate flow. If your AC unit is leaking water inside your home, dripping onto the floor, or not draining properly, a missing or damaged drain plug is often the cause.

Instead of dealing with water damage or replacing your unit, this quick fix can restore proper operation in minutes.

Common Problems This Drain Plug Fixes:

• Window air conditioner leaking water inside
• AC unit dripping water onto floor or wall
• Water leaking from back or side of window unit
• Condensate not draining properly
• Missing or cracked drain plug
• Mini split indoor unit leaking water
• Air handler leaking from unused drain port

Key Features:

• Commonly used in window air conditioners and mini split systems
• Seals drain openings to prevent leaks and water damage
• Helps restore proper condensate drainage
• Quick and easy installation
• Compact, durable design

Product Details:

• Part Number: QB-KIT1
• Type: Drain Plug Kit
• Applications: Window AC units, mini splits, air handlers, HVAC equipment

Compatibility & Use:

This drain plug is widely used in window air conditioners and may also be compatible with mini split systems and other HVAC equipment depending on size and configuration.

Compatibility is not guaranteed for all models—please verify fitment or contact us before ordering.

Why Your AC Is Leaking Water:

Most window air conditioners and mini splits rely on proper drainage to remove condensation. If a drain port is left open or the plug is missing, water can leak directly from the unit instead of draining safely outside.

Common Use Cases:

• Replacing a lost or damaged drain plug in a window AC unit
• Fixing indoor water leaks quickly and affordably
• Redirecting water flow during installation or maintenance
• Sealing unused drain holes in mini split systems

Additional Notes:

• Stock images may be used
• Professional installation recommended
• Verify size and fitment before ordering

Before replacing your air conditioner, check the drain—this small part is one of the most common causes of AC water leaks.