How to Remove Concrete From a Pipe Using a Flex Shaft

Clearing blockages in pipes can be tough, but few challenges compare to dealing with hardened concrete. One question we often get is:
“Can I remove concrete from a pipe using a flex shaft?”

The answer? It depends on the type and extent of the concrete.

Identify the Type of Obstruction

Before choosing your tool, it’s important to understand what’s actually inside the pipe:

• Solid Concrete
  If the pipe is filled with full-strength concrete that includes thick limestone aggregates, the material is extremely tough, often even harder than the pipe itself.
• Hardened Cement or Grout
  If the blockage is just cement, grout, or gravel that has hardened, the removal process is much more manageable.

Choosing the Right Tool for the Job

Start Simple – Regular Chains

Begin with a standard chain head on your flexible shaft. This may be enough to handle lighter or less dense blockages, such as cement or tile grout.

Step Up – Root Removal Tool

If the regular chain doesn’t work, switch to a root removal tool. It’s more aggressive and designed to cut through solid, stubborn materials. It typically covers around 90% of the pipe’s diameter, giving it a wide reach and solid impact.

When Nothing Else Works – Picote Smart Cutter

When it comes to solid, full-on concrete, especially mixes with aggregates, the Picote Smart Cutter is the most reliable option we’ve used. It’s built to tackle the kind of solid material that standard tools can’t break through.

Final Thoughts

Removing concrete from a pipe with a flex shaft is absolutely possible, but the right approach depends on the material you’re up against. Start with lighter tools and work your way up. For solid, embedded concrete, go straight to the heavy-duty option.

We’ve also created a video on this topic, you can check it out here.

Got a tricky blockage or need help figuring out which tool to use? Get in touch. We’re here to help.