GB. Croft Filters. Veronika Sharrock, Filter Manufacturer. Croft Filters have had over 25 years of experience designing and manufacturing industrial filters for a range of industries including: water treatment, power generation, pharmaceutical, oil and gas, food, automobile and nuclear. In today’s modern manufacturing plants there is a high demand for customised filtration. They are about to launch a new range of filters using state-of-the-art Additive Manufacturing Technology. The prototype for their new range was first tested and produced by a plastic 3D printer at Fablab, Manchester. After discovering that it was a success they purchased a 3D metal printer themselves. Their site is 6000 sq ft and has 30 employees. 2013.