Plenty Filters are one of the few engineering companies that make Heap & Partners look like a youngster We have been stocking the Hindle ball valve range for over thirty years and have consequently built up a large knowledge base on the strengths of this valve We were founded in 1866 by William Heap as an engineering supply company Today we operate from three offices around the United Kingdom in Liverpool, London and Teesside supplying some of the best process and instrumentation valves and ancillary equipment available on the market today