John Guest

John Guest invented the ‘Super Speedfit’ tube connector concept. The new product reduced assembly times to a few seconds with an instant tube-coupling system, which needed no tools for putting together or disconnecting.^[4] The original fittings had brass collets and zinc or brass bodies. The current Speedfit range mainly incorporates plastic fittings and plastic collets but still maintains the stainless steel teeth, an essential part of the collet design.