These are threaded fittings, that connect pipes of a larger diameter to a smaller one. A coupling outlet intended for use in low-pressure piping systems. They are similar to threaded half coupling and are produced in NPT female threads for 300# service. Primarily, they are used in fire protection sprinkler systems. The fitting is threaded at one end, making its installation and removal easy. Yet, repeated dismantling could cause the threads to get damaged. Therefore, while a coupolet is reusable, it must be done so with discretion.
