Removing snapped connectors can be challenging, and the method you use will depend on the tools you have available to hand. Generally, a connector will snap due to either over-tightening or a build up of salt deposits that seep down into the connector thread. This acts like a glue and, when trying to remove the connector it can cause it to break.
We've put together a list of methods to assist you, all of which have been tried and tested with different levels of success.
Step 1. Preparation is Key!
Preparation is crucial when removing any snapped connector. Whatever the part the preparation process is the same.
First, try to remove the Peek tubing with either plyers or tweezers. If that’s not possible, cut it as close as you can to the snapped connector and remove the part from the instrument.
Soak the part in warm or hot (40°C) 10% decon solution for 10-20 minutes. Use a sonicating bath if you have one available. The warm water will help loosen any salt deposits in the thread and aid with the removal.
Skipping this step could lead to a damaged part but if you feel the connector is loose enough to remove then proceed to Step 2.
Step 2. Remove the snapped connector
Either of these methods have a varying success rate, choose the appropriate method to match the tools or equipment you have available.
Method 1. The box cutter method (<25% success rate)
While not ideal, this method can work in cases where no other tools are available and if the connector isn’t tightly fitted.
Firstly, run the blade back and forth along the connector cutting into it. Try to turn the cutter counter-clockwise and notice if the connector turns with the movement. If there's no movement try cutting further into the connector.
Once the connector starts to turn use the tip of the blade to unscrew the connector. Once it’s loosened enough, you can remove the remaining part by hand.
Method 2. Cytiva method (50% success rate)
Torx screwdrivers are required for this method, ideally sizes T5, T6, T7 & T8.
Starting with a T5 Torx screwdriver push the diver into the opening where the tubing would be located.
Turn the driver counter-clockwise to unscrew the snapped connector. If the driver doesn’t grip, switch to a slightly larger size until the connector can be unscrewed.
Be careful not to damage the threads by widening the hole too much.
Method 3. Heated screwdriver (+70% success rate)
A steady hand is required for this method.
Heat the tip of a 2-2.5mm flathead screwdriver for a few minutes and push it into the centre of the snapped connector (roughly 5mm deep). Be careful not to stray too close to the edge, as this can damage the threads.
Once the driver cools, twist counter-clockwise to unscrew the connector.
This method works well with snapped connectors in metal parts such as UV flow cells or check valves and where the tubing has been cut as opposed to removed with plyers or tweezers.
Method 4. Screw extraction tool method (+80% success rate)
You can pick up an extraction tool fairly cheap online and if you frequently encounter snapped connectors then it is definitely worth the small investment. These tools are designed for extracting snapped metal bolts and work very well removing plastic connectors. Size No.1 or No.2 is recommended, bigger sizes can damage the screw thread. The wider thread extraction tool as shown in the picture generally work well.
The tool works by screwing the extraction tool counter-clockwise into the hole left by the tubing. As the extractor turns it grips onto the connector and begins to unscrew.
Step 3. Clean and refit
Before re-installing the part and fitting a new connector, ensure that it’s thoroughly cleaned and free from plastic debris. Check that the port is clear, any debris left behind could cause blockages in the flow path. We recommend cleaning the part again in warm or hot (40°C) 10% decon solution for 10-20 minutes. Perform a system wash and monitor the pressure values, excessive pressure will highlight a potential blockage.
Alternatively, if you don’t have access to some of the tools mentioned you could ship your item to Service Lab and we'll assist with removing this for you. Visit our spares shop if you need any replacement parts.
Feel free to comment below if you have any other tips to remove snapped connectors.
AKTA Repair | AKTA Tubing Connector | AKTA Peek Tubing
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