Inflatable Drain Plug Natural Rubber Bung – DN50 DN75 DN100

Natural Rubber Inflatable Drain Plug – Secure Pipe Blocking for DN50, DN75 & DN100

Keep your plumbing and drainage work safe and leak-free with this Natural Rubber Inflatable Drain Plug. Designed for professional and DIY use, this air-bag bung expands to create a firm, airtight seal inside standard drain pipes — ideal for testing, maintenance, or blocking water flow during repairs. Simply insert, inflate, and the natural rubber bag expands to tightly grip the interior pipe wall.

Key Features

• Natural Rubber Construction: Durable, flexible natural rubber resists wear and maintains a reliable seal under working pressure.
• Inflatable Design: Easily inflated and deflated for quick installation and removal — no special tools required.
• Multiple Size Options: Available in DN50 (fits 50mm), DN75 (fits 75mm), and DN100 (fits 100–110mm) to match standard pipe diameters.
• Black Color: Classic black finish for easy visibility in drain environments.
• Working Pressure: Rated for use up to 100 kPa — do not exceed rated pressure.
• 1 Piece Per Package: Each order includes one inflatable drain plug bung.

Important Usage Guidelines

1. Ensure the inside of the pipe is clean, smooth, and free of burrs before insertion. Surface irregularities can affect the seal and may damage the air bag.
2. Always use this air bag plug in the correct pipe type and matching diameter size.
3. Do not position the air bag at a pipe joint — gaps at joints will reduce sealing effectiveness.
4. Do not exceed the rated working pressure to avoid damage or failure.

Specifications

Note: Due to variations in monitor calibration, the actual product color may differ slightly from images shown.

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Frequently Asked Questions

Q: What pipe sizes does this inflatable drain plug fit?

A: This natural rubber inflatable drain plug is available in three sizes: DN50 (fits 50mm pipes), DN75 (fits 75mm pipes), and DN100 (fits 100–110mm pipes). Select the correct size matching your pipe's inner diameter for a secure, airtight seal.

Q: How do I use an inflatable drain bung plug?

A: Insert the deflated natural rubber bung into the clean, smooth, burr-free pipe. Then inflate it using a pump until it expands firmly against the pipe wall and creates a tight seal. To remove, simply deflate the air bag and pull it free. Always ensure you do not exceed the rated working pressure of 100 kPa.

Q: Can I use this plug at a pipe joint or connector?

A: No — it is not recommended to use the inflatable drain plug at pipe joints or connectors. Gaps present at joints can compromise the sealing effectiveness. Always position the plug in a straight, unobstructed section of pipe for best results.

Q: Is this drain plug suitable for repeated use?

A: Yes, the high-quality natural rubber construction is designed for durability and can be deflated, removed, and reused multiple times. Always inspect the air bag for signs of wear or damage before each use to ensure a reliable seal.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.