Boll filter USA offers top-notch manufacturer’s warranties for all genuine parts. Use Boll filter parts for the filtration of liquid substances and enjoy an excellent world-wide reputation. This is due to their filtering performance, their quality, and their reliability. Normally they are maintenance-free and wear-free during operation. However if parts of a Boll filter have to be replaced, it could be due to problems in other parts of the plant's filtering system.