Vokera Pressure Relief Valve may be tempting to opt for a lower priced spare part, but do consider the impact that this may have. Counterfeit parts are typically substandard and manufactured from poor quality materials, thus impacting on the design and strength of the product. In the event of a system failure or, in a worst-case scenario, an accident, the ultimate responsibility lies with the service and repair engineer rather than the product, which was ill-chosen for the application. It is always recommended that you go for an official test, such as this one.