Can I Put Two Drain Cleaning Chains on a Flex Shaft?

We’re often asked by professionals in the plumbing and sewer cleaning industry whether it’s possible—or even recommended—to mount two drain cleaning chains on a flex shaft at the same time.

Is it doable?
Yes, it is.
Is it always the best option?
That depends on your specific situation.

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Using Two Drain Cleaning Chains on One Shaft: How It Works

Here’s a scenario to illustrate. Say you’re working on a pipe with a severe buildup of scale. One way to approach it is to attach two different chain tools to your flex shaft in sequence:

• Leading the way: a blockage removal chain with a drill head, designed to break apart stubborn obstructions.
• Following behind: a circular descaling chain, which scrapes and polishes the pipe walls once the initial debris is cleared.

This configuration allows the first chain to do the heavy work, loosening as much material as possible, while the second chain finishes the job by cleaning the internal surface of the pipe. It’s a method that can help streamline the process, especially when facing tough scale.

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Advantages and Disadvantages of the Dual-Chain Method

Potential Advantages:

• Saves time by combining two cleaning actions in one pass.
• Useful for removing heavy scale buildup or calcification.
• Reduces the need to stop, withdraw the shaft, and change tools mid-job.

Possible Drawbacks:

• Less maneuverability: Two chains may limit how well the shaft moves through tight bends.
• Greater resistance: Increased load and friction can strain the equipment.
• Limited control: It’s harder to manage the cleaning action of each chain separately.

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What We Recommend

While it is certainly feasible to use two drain cleaning chains on the same flex shaft, our general advice is to stick with one chain at a time.

Why? Running a single chain gives you better handling, precision, and adaptability—especially important when working inside older or delicate piping. It also minimizes wear on your shaft and motor.

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Wrapping Up

In certain cases—like when working on a straight pipe filled with hard deposits—a dual-chain setup might be effective and save time. But in most situations, especially those involving curves or fragile pipes, a single-tool approach is the safer and more reliable choice.

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Need help choosing the right chain for your flex shaft?
Get in touch with us or browse our collection of professional-grade drain cleaning equipment in our online store. You can also watch our video on this topic here.