Single In-Line Leak Indicator

SKU: 811-MV039

Price:
Sale price$187.06

Description

McDantim In-Line Leak Indicator

Find Gas Leaks in Seconds. Stop Wasting CO₂, Nitrogen & Money.

If you’re losing gas, you’re losing profit.

The McDantim In-Line Leak Indicator instantly shows you whether your draft beer system has a leak — and how large that leak is — regardless of your gas source, system size, or complexity.

One quick glance tells you everything you need to know.


Why This Matters

A leak as small as ½ cubic foot per hour wastes more gas each day than it takes to dispense two full kegs of beer.

That’s:

  • Wasted CO₂ or Nitrogen

  • Increased gas bills

  • Poor carbonation performance

  • Inconsistent pours

  • Unnecessary service calls

With this simple inline device, you’ll know immediately if gas is flowing when it shouldn’t be.


How It Works

When you’re not pouring beer:

  • Ball resting at the bottom → No leak.

  • Ball lifted in the tube → Gas is flowing. You have a leak.

  • Higher ball position → Larger leak.

It’s that simple.

Check it before your first pour of the day or after your last pour at night. If there’s movement, you know action is required.

As you repair leaks, the indicator becomes your scorecard, confirming when the issue is fully resolved.


Essential for Nitrogen Generator Systems

Leak detection is even more critical in systems using nitrogen generators.

Leaks in these systems:

  • Waste gas and electricity

  • Force compressors to run continuously

  • Shorten compressor lifespan

  • Lead to costly rebuilds or replacements

A small investment in leak monitoring protects expensive compressor equipment.


Built for Commercial Draft Systems

  • 1/4" BSPP inlet and outlet threads

  • Hose barbs or BSPP/NPT adapters available

  • Compact inline design

  • Durable construction

  • Works with CO₂, Nitrogen, or blended gas

Installs directly in your gas line and works with:

  • Single-keg setups

  • Multi-regulator systems

  • Long-draw draft systems

  • Complex multi-tap installations

No electronics. No calibration. No guessing.


Stop Leaks Before They Cost You

Gas leaks are:

  • Dangerous

  • Expensive

  • Easy to miss without the right tool

The McDantim In-Line Leak Indicator gives you immediate visibility into your system’s health — helping you prevent wasted gas, protect equipment, and maintain consistent draft performance.

Know before you pour.


Why Buy Now?

Every Day You Wait, You’re Paying for Leaks.

Gas leaks don’t fix themselves.
They quietly drain your CO₂ or Nitrogen supply, increase utility costs, and stress your equipment — all while you pour beer like nothing’s wrong.

Even a small ½ cubic foot per hour leak can waste more gas in a day than it takes to pour two full kegs of beer.

That’s money literally leaking out of your system.


Protect Your Gas. Protect Your Equipment.

If you run:

  • Nitrogen generators

  • Blended gas systems

  • Multi-regulator setups

  • Long-draw systems

Undetected leaks can force compressors to run continuously — leading to premature failure and expensive repairs.

Replacing a compressor costs far more than preventing the damage in the first place.


It Takes Seconds to Check — and Could Save Thousands

One glance:

  • Ball down → You’re good.

  • Ball floating → You have a leak.

No electronics. No testing kits. No guesswork.

Just immediate confirmation before your first pour or after your last.


The Smart Operator Checks Daily

The difference between profitable draft systems and costly ones often comes down to visibility.

If you care about:

  • Lower gas bills

  • Fewer service calls

  • Longer equipment life

  • Consistent pours

There’s no reason to wait.

Install a McDantim In-Line Leak Indicator today and stop paying for invisible problems.



Instructions

Dimensions

5/16" BARBS INSTALLED UNLESS OTHERWISE NOTED

Storytime from McDantim:

I want to turn the whole thing upside down

For so long, people have been using “detector” for the nomenclature, which is patently wrong. This device shows gas flow, regardless of the gas flowing through the tubes. Detectors sometimes act more like sniffers, which just makes me think of a cartoon bloodhound, and can be purchased at your local hardware store. But for leak detection in draught beverage systems, we like to use our Pressure Degradation test (on our YouTube, shameless plug) or soapy water. Now, if you have a massive system, drenching the whole thing in soapy water in hopes of seeing bubbles can be a bit laborious. Installing an ILLI at a vital point can help you determine, when no gas is intentionally being used, if you have gas flowing.

The numbers next to the tube don’t explain the liters per minute or cubic feet per hour you’re losing. The levels on the ILLI, shown here, indicate the severity of the gas flow. And there are some cute little screens to inhibit any debris from getting into said tubes that could make the ball stick. Making sure the ILLI is installed correctly for the gas supply flow is vitally important. Gas Flow + Plastic Ball = Float. Gas Flow – Plastic Ball + Gravity = Drop. Gravity + Plastic Ball + Upside Down ILLI = Stuck & No Flow. (Dan says it can flow to a point, but if the system is pressurized suddenly, the ball can lodge and get stuck, thus No Flow.)

As a certified human dum-dum, I have installed stuff upside down more than I would like to admit. I have also forgotten about gravity, and how heartless it can be: what do you mean I can’t carry a glass of beer and bend over at the waist to pick something up and NOT spill beer all over my shoes?! Fortunately, reconnecting the tubing for the ILLI to ensure proper gas flow is much easier than trying to explain to my friends that I am NOT a hot mess who has the grace of a newborn giraffe.

The ILLI is a marvelous addition to your gas supply system, and, when installed correctly, can help you identify the gas flow so you can find and fix leaks as soon as they appear. If only I could find something to help me not spill my beer…

Written by Kayla Mann; June 2019

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