Bristan Shower Mixer Problems

Bristan is a renowned brand in the plumbing industry, especially for its thermostatic mixer valves. However, like any product, certain issues may arise over time. One of the predominant challenges faced by users is the consistent temperature drop in the shower outlet, which has left many professionals and homeowners puzzled. This article will delve into the problem and offer possible remedies.

The Problem

Several users of the Bristan Prism thermostatic mixer valve, specifically the ones fitted onto combi systems like the oil-fired Grant Combi 70, have encountered a recurring issue. After some time, usually after a few months or up to a year, the shower begins to produce water at a lower temperature than expected. The initial solution for many has been to replace the cartridge, which often resolves the issue temporarily. However, the problem tends to recur, leading to frustration and loss of faith in the product.

Probable Causes and Solutions

1. Limescale Build-Up: One of the common explanations suggested by Bristan is the build-up of limescale. But upon examination, many users have found no visible limescale. Furthermore, the moving ‘washer’ end of the cartridge appears to be sticking against the main body, preventing it from functioning correctly. Freeing up the ‘washer’ end can temporarily fix the issue.
2. Cartridge Design Flaw: Some users speculate that the problem lies within the design of the cartridge itself. Given that the cartridges appear to be a recurring issue, it could be that they are too precise or delicate for regular use.
3. Water Quality: The issue has been prevalent, particularly in areas with soft water, such as South Wales. However, the connection between soft water and this problem is not yet definitive.

Recommendations

1. Regular Maintenance: Periodically checking the cartridge for any signs of wear or issues can prevent the problem from escalating. Ensure that the ‘washer’ end is not sticking and that there is no unexpected build-up hindering its function.
2. Warranty Utilization: Bristan provides a five-year guarantee on faulty parts. If problems arise within this period, it’s advisable to contact Bristan and take advantage of the warranty. In several cases, Bristan has replaced faulty cartridges without any hassle.
3. Consider Upgrading: If the problem persists, Bristan has suggested replacing the problematic valve with an Artisan, which is another model they offer with a different cartridge design. This might be a more permanent solution for those facing persistent issues.
4. Seek Expertise: If you’re unsure about the cause or the solution, consider consulting with a plumbing professional. They can provide insights into the problem and suggest appropriate measures.

Conclusion

While the Bristan Prism thermostatic mixer valve is generally regarded as a quality product, the recurring temperature issue is a concern for many users. Regular maintenance, utilizing the warranty, or considering an upgrade can help mitigate these issues. However, open communication with the manufacturer and staying informed about potential solutions can ensure a seamless showering experience.