A coupling for a tube includes an attachment and a housing. The attachment is attached to the tube and has a barrel-shaped exterior surface. The housing contains the barrel-shaped exterior surface such that the attachment is rotatable in the housing while not being removable from the housing. The coupling thereby allows easy rotation of the tube within the coupling. The coupling may be utilized to attach the tube to another tube or to another structure.

A pipe coupling includes a coupling band and an elastomeric seal disposed inside the coupling band, ratchet depressions formed on a portion of the coupling band, and a ratchet rod assembly mounted on another portion of the coupling band. The ratchet rod assembly includes a ratchet rod formed with ratchet teeth that interface with the ratchet depressions, such that rotation of the ratchet rod causes the ratchet teeth to progressively advance from one set of the ratchet depressions to another set of the ratchet depressions, which reduces an inner diameter of the elastomeric seal in the coupling band.

A pipe coupling includes a coupling band and an elastomeric seal disposed inside the coupling band, ratchet depressions formed on a portion of the coupling band, and a ratchet rod assembly mounted on another portion of the coupling band. The ratchet rod assembly includes a ratchet rod formed with ratchet teeth that interface with the ratchet depressions, such that rotation of the ratchet rod causes the ratchet teeth to progressively advance from one set of the ratchet depressions to another set of the ratchet depressions, which reduces an inner diameter of the elastomeric seal in the coupling band.