Pump tubing maintenance is essential for hygiene and equipment performance. Failure to properly clean and dry this tubing can lead to the growth of mold and bacteria, compromising the safety and function of the device. Understanding the correct cleaning procedure and knowing when to replace the tubing ensures the longevity and safe operation of the system. Since the internal diameter of most pump tubing is small, trapped moisture creates an ideal environment for microbial growth.
Tubing Types: Washable vs. Air-Only
The decision to clean pump tubing depends on its design and function. Most pump systems fall into two categories: those handling liquid and those handling only air. Tubing designed to move fluids, such as medical or food-grade pumps (open systems), must be cleaned regularly following a defined protocol since the liquid directly contacts the tubing walls.
Conversely, many modern pumps utilize a “closed system” design with a protective barrier preventing liquid from entering the air-flow tubing. For this air-only tubing, washing is unnecessary and often discouraged by the manufacturer. If moisture or liquid enters this type of tubing, it is considered compromised. Manufacturers recommend immediate replacement rather than attempting to clean a tube not designed for liquid exposure.
Step-by-Step Cleaning for Liquid-Exposed Tubing
If the pump tubing is part of an open system or has been visibly contaminated, a hands-on cleaning process is required. Begin by fully disconnecting the tubing from the pump motor and all other components. Running cool water through the tube first helps to dislodge any residual material before it sets on the internal surface.
Next, prepare a cleaning solution using warm water and mild dish soap, which acts as a surfactant to lift debris. Submerge the tubing entirely in the soapy water and gently agitate it to ensure the solution moves through the entire length. For intensive cleaning, a solution of one part white vinegar mixed with three parts water can help break down mineral deposits or residual films. Rinse the tubing thoroughly with clean, running water afterward to remove all traces of soap or vinegar, as residues can degrade the material or contaminate the next fluid.
Ensuring Complete Drying and Mold Prevention
The most important step in preventing mold and bacterial growth is ensuring the tubing is completely dry before storage or reuse. Mold spores thrive in damp, enclosed environments, and residual moisture inside the tube creates a perfect microclimate. After rinsing, shake the tubing vigorously to expel excess water, using centrifugal force to push droplets out of the ends.
Hang the tubing vertically in a clean, well-ventilated space, allowing gravity and air circulation to draw out remaining moisture. To accelerate drying, some manufacturers permit “dry cycling,” which involves reattaching the tubing to the pump motor and running the machine for several minutes without attachments. This pushes a steady stream of air through the lumen, effectively drying the interior. Avoid using heat, such as a hairdryer, as excessive temperatures can cause the tubing material to warp, crack, or lose structural integrity.
Knowing When to Replace Tubing
Even with diligent cleaning, tubing materials degrade over time and must be replaced to maintain hygiene and pump efficiency. The clearest indication for replacement is the presence of visible mold, which often appears as black, green, or white spots or a fuzzy texture inside. If mold is present, the tubing should be discarded immediately, as cleaning may not fully eliminate all spores, posing a continued risk.
Other signs of material fatigue include discoloration, such as yellowing or cloudiness, suggesting chemical breakdown or contamination. A loss of flexibility, becoming stiff or brittle, or the appearance of small cracks and tears will negatively impact suction strength and pump performance. Many manufacturers recommend replacing tubing every three to six months as a general rule, regardless of appearance, to ensure optimal function and safety.