Compressed air regulators control the pressure in the air supply that is delivered by the air compressor. They adjust for pressure fluctuations caused by other air consuming devices on the supply line, and they ensure appropriate air pressure for downstream components and tools to prevent damage and improve performance. FRL compressed air regulators refer to a modular system comprised of a filter, a regulator, and a lubricator. FRLs treat and regulate the compressed air before it is delivered to downstream equipment, or the point of use. Main line compressed air regulators are installed on the primary air supply line after the air compressor. Miniature compressed air regulators are compact, lightweight and attach directly to an air tool.