Value Collection AP04.50 Aluminum Expansion Plug

Product Description

The VALUE COLLECTION AP04.50 is an aluminum expansion plug designed to seal pipe openings during pressure testing, system maintenance, or temporary line isolation. The plug expands from an unexpanded diameter of 4.251 inches to a fully expanded diameter of 4.724 inches, creating a secure mechanical seal inside the pipe bore. It is rated for a maximum working pressure of 9 psi and features a 1/2-inch stem diameter for tightening with standard hand tools. Plumbers, pipefitters, and mechanical contractors use this type of plug when blanking off pipe ends without permanent fittings.

This expansion plug is suited for residential and commercial plumbing, drainage, and mechanical piping systems where a temporary or semi-permanent seal is needed on open pipe ends. Typical applications include pressure testing drain lines, capping unused branch connections, and isolating pipe sections during repair or renovation work. The all-aluminum construction keeps the plug lightweight while resisting corrosion in wet environments.

Key Features

• Expands from 4.251 inches to 4.724 inches to seat firmly inside the pipe bore
• Maximum working pressure of 9 psi for low-pressure sealing applications
• 1/2-inch stem diameter accepts standard wrench or socket drive
• Aluminum construction provides corrosion resistance and a lightweight profile
• Mechanical expansion design eliminates the need for adhesives or permanent fittings

Compatibility

Designed as an OEM-style replacement and general-use expansion plug for pipe bores with an internal diameter in the range of 4.251 to 4.724 inches, typical of nominal 4-inch pipe schedules in plumbing and mechanical piping systems.

Installation Notes

Installation is performed by plumbers or pipefitters. Before inserting the plug, confirm the pipe bore is clean and free of debris that could compromise the seal. Insert the unexpanded plug into the pipe opening and tighten the stem with a wrench until the plug seats firmly against the pipe wall. Do not exceed the 9 psi rated working pressure, and always depressurize the system before removing the plug.