A leading kitchen hardware manufacturer has doubled the warranty on its entire range of kitchen sinks.Innovative Swiss firm Franke has announced that it is to extend its current warranty from 25 years to 50 years.In a statement, the company said In this world of built-in obsolescence, Franke is nevertheless endorsing its high quality craftsmanship, innovation and design by extending the guarantee against manufacturing on all sinks to a remarkable 50 years.David Houghton, commercial director of Franke UK Limited, commented on the announcement So confident is Franke about the life span of its products that the already lengthy 25-year guarantee has been increased to 50 years.Franke manufactures a wide range of products, including stainless steel kitchen sinks, undermount kitchen sinks and granite sinks.The company is also know for its kitchen taps such as the filter tap and Aquifier tap models and Franke sink accessories, plus it also manufactures a range of food waste disposer units.