Technical Products | #4X | 3/4" & 1" Pipe Expansion Winter Plug

This #4X Pipe Expansion Winter Plug is designed to temporarily seal 3/4-inch and 1-inch pool and spa plumbing lines during winterization, maintenance, pressure testing, and repairs. Its expandable rubber body creates 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 reliable sealing for compatible pipe openings in residential and commercial pool systems.

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Key Features

• Fits compatible 3/4" and 1" pipe openings

• Expandable rubber body creates a watertight seal

• Ideal for winterization and pressure testing

• Reusable design for seasonal maintenance

• Helps protect plumbing from freeze damage

• Suitable for residential and commercial pool systems

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Product Overview

The Technical Products #4X 3/4" & 1" Pipe Expansion Winter Plug is engineered to temporarily seal compatible pipe openings during winter pool closings and equipment servicing. The expandable rubber body compresses to form a dependable seal that prevents water from entering or escaping the plumbing system during maintenance or storage.

This expansion plug is commonly used by pool professionals and homeowners for winterization, plumbing isolation, leak detection, and pressure testing. Verify the pipe size before installation to ensure proper fit and dependable sealing performance.