Compression tube fittings connect without tools and can be used with most PEX, LDPE, MDPE, HDPE, copper, CTS, CPVC, or polybutylene tubing in low-pressure fluid applications. Compression fittings include preassembled bodies, nuts, and sleeves for quick installations. The sleeve grips the tubing and as the nut tightens it compresses the sleeve for a tight seal. Compression fittings are available in a variety of metal and plastic materials for multiple applications.