How can I increase my filtration capacity when spaces are limited? The Forty-X™ disc filter pleated panel design provides more treatment capacity than any other woven media flat panel design and includes a 10-micron absolute media rating. Filtration results are really definable. The Forty-X™ disc filter provides a simple, highly reliable filtration system. The system is an ideal drop in retrofit for existing plants. It needs a very small footprint related to its filtration capacity.