Pipe Plugs – FAQs

Used for blocking or testing pipes, pneumatic pipe plugs (also called pipe

stoppers, purge stoppers, test plugs and pipe purge bungs) make a whole range of

jobs easier by effectively temporarily stopping fluids flowing through pipes. This enables work to be done, including vital flow and leak tests, repairs and sealing/resealing.

In his video, Huntley from the TransQuip team takes you through some of the most frequently asked pipe plug questions.

Or check out the blog below for his thoughts, links and some additional tips.

Where and why are pipe plugs used?

Pipe plugs are used primarily in drains and other pipework to stop the flow of fluids (water, stormwater or sewage). Usually, this is by plumbers or on related waterworks (civil engineering) projects.

Pipe plugs are an important piece of kit when it comes to testing pipes to ensure they are up to standard and leak-free, and to test new sections of pipelines.

How do they work?

The pipe plugs are fitted into the pipe and then inflated – so they fill it, stopping fluids getting past them. (Like a plug in a bathtub.)

What sizes do pipe plugs come in?

The range is huge. It goes from 100mm and 1.8 meters. They are also available in by-pass plugs for that same range. https://www.transquip.co.nz/Civil/Site-Gear/Pipe-Bungs-Silt-Socks

When would you use a bypass?

Bypass pipe bungs are commonly used when testing for a pipe leakage. Usual practice is to have a standard pipe bung with no bypass at one end and a bung with a bypass at the other. Air is pumped through and, if there’s a leak, the air escaping will indicate the part of the pipe that needs repairing. Job made easy!

What are pipe bungs made from?

Pipe bungs are made from a high quality rubber with built-in aramid (synthetic polyamide) reinforcing for extra strength. Aramids are resistant to solvents and heat. This combination delivers reliability and longevity in even demanding environments which, let’s face it, pipes are!

Tip: Pipe plugs should always be stored away from direct light in a cool, dry place to avoid damage and perishing.

Are pipe bungs oil resistant?

Standard pipe bungs are not oil resistant, but oil resistant options are available. Talk to one of our TransQuip team about what you need – they’ll be able to steer you in the right direction.

What kind of couplers do pipe bungs need?

The standard pipe bung uses the most common pneumatic aero fitting used in New Zealand.

Do I have to buy a pipe bung, or can I hire?

Pipe bungs in a wide range of sizes are available from TransQuip to buy or to hire.

What else will I need?

PICTURE OF 2530

We’d also recommend using a SAVA single gauge controller 2.5 bar https://www.transquip.co.nz/Sava-single-gauge-controller-2.5-bar so you don’t over inflate the pipe bungs.

Tips: Always read the safety instructions before using a pipe plug. And never inflate beyond the maximum inflation pressure.

If pipe bungs are used for more than a few hours, pressure needs to be checked regularly, to be safe.

Whatever you need, TransQuip have pipe bungs, gauges and great advice.

Talk to the team today. We’re always happy to help.