Making plumbing connections is easy with Quick Connect Fittings. All you need to make a connection is the requisite tubing, the desired fitting and a standard tube cutter. Just cut the tubing, push it into the fitting until it hits the internal stop and voila?a leak-free connection has been made! To disconnect, just hold the collet and pull the tube out. That sure beats a hose barb! Connections can be made with hot or cold potable freshwater or saltwater in boats and RVs with no screwing or clamping required. Connectors are best used with cross-linked polyethylene Flexpipe? marine-grade tubing (offered below) that gives the same reliability as metal piping without corrosion. Piping is NSF listed and made of FDA approved materials. Rated to 100 PSI and temperatures of ?40° to +180°F. 15mm fittings are black, and 5/8" fittings are white. Manufacturer's one year limited warranty.