Technical Products | #5C | Expansion Winter Plug with Wing Nut

This #5C expansion winter plug is designed to temporarily seal compatible pool and spa plumbing lines during winterization, maintenance, pressure testing, and repairs. Its expandable rubber body and durable wing nut create a secure, watertight seal that helps protect plumbing from water intrusion and freeze damage.

Ideal for seasonal pool closing and routine service work, this reusable expansion plug provides a dependable sealing solution for residential and commercial pool systems.

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Key Features

• #5C expandable winter plug

• Durable rubber expansion body

• Wing nut for quick, tool-free tightening

• Creates a secure, watertight seal

• Reusable for seasonal maintenance

• Ideal for winterization, pressure testing, and plumbing repairs

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Product Overview

The Technical Products #5C Expansion Winter Plug is engineered to temporarily seal compatible pool and spa plumbing openings during winterization and equipment servicing. Tightening the wing nut compresses the expandable rubber body, creating a reliable seal that helps prevent water from entering or escaping the plumbing system.

This expansion plug is commonly used by pool service professionals and homeowners for winter pool closings, plumbing isolation, leak detection, and routine maintenance. Verify the pipe or fitting size before installation to ensure the correct fit and dependable sealing performance.