The PolarCool 3/4" Drain Cap Replacement (Part No. 6422-6022) is a direct-replacement drain cap and washer assembly designed for PolarCool evaporative coolers with 3/4" drain outlets. Featuring a rubber washer for reliable sealing, this cap prevents leaks and ensures proper reservoir drainage in portable evaporative air coolers, swamp coolers, and industrial air coolers — supporting efficient maintenance and consistent cooling performance.

Key Features

• Also fits some early versions of the black 36" Pro: verify drain size before ordering.
• Durable construction withstands repeated removal and installation during routine maintenance.
• Direct-fit replacement simplifies installation and reduces service time.
• Compatible with drain outlet assembly SKU 6422-7010.

Benefits

• Restores secure, leak-free sealing to reservoir drain outlets.
• Rubber washer ensures tight seal to the drain outlet, preventing water loss and mess during operation.
• Reduces downtime with fast, straightforward replacement during routine service.
• Supports proper water management and efficient evaporative cooling performance.
• Durable materials withstand heavy-duty use in warehouse cooling, outdoor cooling systems, and industrial environments.

Applications

• Compatible with some early-model black 36" Pro units: verify drain size before purchasing.
• Ideal for warehouse cooling, outdoor cooling systems, and portable evaporative air coolers.
• Suitable for maintenance inventories, service kits, and replacement parts for swamp coolers and industrial air coolers.

Compatibility & Installation Notes

• Important: This is a 3/4" drain cap. It does not fit all 36" Pro or Zone models.
• Verify your drain size and configuration before ordering.
• Some early versions of the black 36" Pro use this 3/4" drain cap; later models use a 2" drain assembly (part number 6422-0722).
• Drain outlet assembly available under SKU 6422-7010.
• Inspect the rubber washer for wear or damage during installation to ensure proper sealing.
• Follow manufacturer installation guidelines for secure fitment and leak-free operation.

Why Choose

This Drain Cap For maintenance teams and facility operators managing PolarCool evaporative coolers, the PolarCool 3/4" Drain Cap Replacement (6422-6022) offers a simple, reliable solution that restores leak-free drainage, supports efficient servicing, and ensures consistent performance across warehouse, industrial, and outdoor cooling applications.

Key Features

• Genuine PolarCool replacement component
• Built for durability and reliable cooling performance
• Designed for easy installation

Compatibility

18, 24, 36, 36 Single Speed, 36 Pro, 48