Inflatable Drain Bung Plug – Natural Rubber DN 50–110 Pipe
Inflatable Drain Bung Plug – Natural Rubber DN 50–110 Pipe
Natural Rubber Inflatable Drain Bung – Fits DN 50 / 75 / 100 / 110 Pipes
Keep your plumbing projects under control with this heavy-duty inflatable drain air bag stop plug. Made from premium natural rubber, this expandable bung creates a secure, airtight seal inside drain and waste pipes — ideal for pipe testing, blockage isolation, maintenance work, and leak checks. Simply insert, inflate, and seal. No tools required.
Key Features
- Universal Fit: Compatible with DN 50, DN 75, DN 100, and DN 110 diameter pipes
- Natural Rubber Construction: Flexible, durable, and resistant to everyday wear — forms a reliable seal against the pipe wall
- Quick-Release Connection: Fast and easy inflate/deflate via the quick-release valve
- CE Certified: Meets recognised safety and quality standards
- Max Working Pressure: Up to 100 kPa (rated below 850 kPa)
- Colour: Black
- Package Contents: 1 × Inflatable Drain Air Bag Bung Plug
How to Use
- Ensure the inside of the pipe is clean, smooth, and free of burrs or sharp edges before inserting the air bag.
- Insert the deflated bung into the correct pipe type — always match the bung size to the pipe diameter.
- Inflate via the quick-release valve until a firm seal is achieved. Do not exceed the recommended pressure.
- Avoid placing the bung at pipe joints where ridges or seams may affect the seal.
- When work is complete, simply deflate and remove.
Important Usage Notes
- The pipe interior must be clean and smooth — debris or burrs can damage the rubber and reduce sealing effectiveness.
- Only use this bung in the corresponding pipe type and size it is designed for.
- Do not position the bung at a pipe joint or coupling — uneven surfaces compromise the seal.
- Never exceed the maximum rated pressure.
- Due to manual measurement, please allow a tolerance of ±1–3 mm. Actual colour may vary slightly from images due to monitor settings.
Made in Mainland China.
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Frequently Asked Questions
Q: What pipe sizes does this inflatable drain bung plug fit?
A: This natural rubber inflatable bung is designed to fit DN 50, DN 75, DN 100, and DN 110 diameter drain and waste pipes. Always ensure you select the correct size for your specific pipe before inflating.
Q: What is the maximum working pressure for this drain air bag?
A: The recommended working pressure is 100 kPa, with a maximum rated pressure of less than 850 kPa. Always inflate gradually and never exceed the stated pressure limit to avoid damage to the bung or pipe.
Q: Can I use this inflatable bung at a pipe joint or coupling?
A: No — it is not recommended to place the bung at a pipe joint or coupling. The raised ridge or seam at these points can prevent a proper airtight seal and may damage the rubber air bag. Always position the bung on a smooth, straight section of pipe.
Q: Is any special equipment needed to inflate the bung?
A: The bung features a quick-release valve connection, making it compatible with a standard hand pump or air compressor. No specialist tooling is required — simply connect, inflate to the working pressure, and the bung expands to seal the pipe.