Technical Products | #0 | 5/8" Tube & 1/2" Pipe Winter Plug with Nylon Wing Nut

This #0 winter plug is designed to seal compatible 5/8-inch tubing and 1/2-inch pool and spa plumbing lines during winterization, maintenance, pressure testing, and repairs. Its expandable rubber body and durable nylon 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

• Fits compatible 5/8" tubing and 1/2" pipe

• Expandable rubber winter plug

• Durable nylon wing nut for tool-free tightening

• Creates a secure, watertight seal

• Reusable design for seasonal maintenance

• Ideal for winterization, pressure testing, and plumbing repairs

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Product Overview

The Technical Products #0 Winter Plug is engineered to temporarily seal compatible 5/8-inch tubing and 1/2-inch pool and spa plumbing lines during winterization and equipment servicing. Tightening the nylon 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, leak detection, plumbing isolation, and routine maintenance. Verify the tube or pipe size before installation to ensure the correct fit and dependable sealing performance.