Swivel-type fittings are designed to allow the coupling and hose connection to rotate, which prevents twisting, kinking and excessive bending. They consist of two major components, a stem and housing that can rotate relative to one another, as well as internal seals and bearings.

Single-plane swivel joints allow hoses to pivot in order to reduce mechanical stress from bending, stretching, and twisting. … With these swivel joints, a rotary seal between the stationary and rotating parts of the manifold contains the pressurized fluid, but allows relative rotation between the two halves.

Pipe Swivels do not seal on the thread-like most pipe threads; they seal on the nose of the swivel and the seat of the male tapered pipe thread. This creates a metal-to-metal seal. The Pipe Swivel Fitting is first installed in the mating component. Then the hose fitting is connected to the swivel nut.

Pipe Swivels are female adapters featuring a nut with a straight thread captured on a 30º cone tapered gland. A seal occurs between the taper in the male fitting and the 30º cone tapered gland. Pipe Swivels are for use with male tapered pipe thread hose fittings with a 30° seat.