Roller and Support for Microdos Dosing Pump – Pool Spare Part

The roller is an essential component of the Microdos pump's peristaltic mechanism. It exerts rotary pressure on the Santoprene tube to compress the liquid (pH- or pH+) and move it towards the injection point in the filtration circuit. The roller rotates continuously during pump operation, regularly crushing the tube and thus creating precise and constant dosing. Without a functional roller, the pump cannot properly deliver the chemical product, and injection stops or becomes irregular, compromising your pool's pH balance.

This roller and bracket assembly is compatible with all Microdos CCEI peristaltic dosing pumps, used in automatic pH regulators such as the Vigipool, pHileo, Limpido, and Oxeo ranges. These pumps are designed to accurately inject pH- (acid) or pH+ (base). Before ordering, ensure you have a Microdos CCEI pump and not a pump from another brand or another CCEI pump model (some older pumps may have different roller dimensions). If in doubt, consult your regulator's manual or contact CCEI technical support.

A worn roller exhibits several characteristic symptoms: visible surface wear (flat spot, deep groove, abrasive texture), cracking or abnormal noises during pump rotation, irregular or absent injection despite a Santoprene tube in good condition, or excessive motor vibrations. If you notice that your pool's pH is no longer regulated correctly while the regulator is operating (pump running, indicator light on), the problem may be a faulty roller that no longer effectively compresses the tube. A cracked or deformed roller must be replaced immediately to avoid damaging the tube or pump head.

The lifespan of a Microdos pump roller typically ranges from 2 to 4 years, depending on usage intensity and the quality of the treated water. A pump that operates 10-12 hours a day throughout the season will wear out its roller faster than a pump used intermittently. Factors contributing to accelerated wear include: an old or hardened Santoprene tube (which forces the roller to press harder), highly concentrated or corrosive chemicals, and a lack of pump head maintenance. Preventive replacement every 3 years is a recommended practice to ensure reliable pH regulation, especially if you use your pool intensively.

Replacing the Microdos roller and bracket is a simple operation that takes 10 to 15 minutes. Start by unplugging the pump electrically and remove the Santoprene tube from the pump head. Unscrew the transparent pump cover to access the internal mechanism. Remove the old roller from its bracket by detaching it from the rotating shaft (check for a pin or retaining clip). Install the new roller onto the provided bracket, position the assembly onto the motor shaft, and close the cover. Reassemble the Santoprene tube, ensuring it is correctly positioned under the roller. Reconnect the pump and test its operation: the roller should turn smoothly without abnormal noise.

Simultaneous replacement of the roller and bracket is highly recommended because the bracket also undergoes mechanical wear over time. The bracket holds the roller in position and is subjected to the same rotational and pressure stresses as the roller. A worn or deformed bracket can cause roller misalignment, leading to irregular tube compression, vibrations, and premature wear of the new roller. By replacing both parts together, you ensure optimal pump operation and avoid having to intervene again a few months later. The roller + bracket assembly is designed to be replaced as a complete kit.

If you are replacing the roller, it is an ideal opportunity to check the condition of the Santoprene tube and replace it if necessary. A hardened, cracked, or deformed tube must be changed, as a new roller on an old tube will only provide limited improvement. Conversely, if the tube is still flexible and in good condition (less than 2 years of use, no visible deformation), you can keep it and only replace the roller. However, for a complete and lasting intervention, many professionals recommend replacing the roller + bracket + Santoprene tube at the same time, especially if the pump is more than 3 years old. This approach ensures maximum reliability for seasons to come.

No, it is strongly advised against using a roller from another brand on a Microdos CCEI pump. The roller's dimensions, its diameter, its material, and the shape of the bracket are specifically designed for the Microdos pump head. An unsuitable roller can cause insufficient or excessive tube compression, leading to either no injection or accelerated wear of the tube and the roller itself. Furthermore, an incorrectly sized roller can damage the internal mechanism of the pump or create leaks. Always use original CCEI spare parts to guarantee the compatibility, performance, and durability of your installation.

To extend the roller's lifespan, perform an annual cleaning of the pump head at the beginning of the season: remove the cover and clean any chemical or limescale deposits that could seize the roller. Ensure the roller rotates freely on its bracket without any hard spots. Replace the Santoprene tube regularly (every 1-2 years) to prevent a hardened tube from putting excessive strain on the roller. Avoid running the pump dry (without product in the container) for extended periods, as this unnecessarily wears out the roller and the tube. Finally, use quality chemical products that are appropriate to avoid corrosion or deposits that could damage the mechanism.

The roller and bracket assembly costs €18.90, while a complete new Microdos pump costs between €80 and €150 depending on the model. Replacing the roller therefore represents a considerable saving of 75 to 90% compared to purchasing a new pump. If your pump's motor and housing are in good condition, simply replacing the roller ( and possibly the Santoprene tube for €9) will extend your pump's life for several more years. This approach is both economical and ecological, avoiding the complete replacement of equipment when only a wear part is defective. Always keep a spare roller in stock to avoid an interruption in pH regulation in the middle of the season.