Transition from FPT pipe or manifold to FHT distribution tubing or dripline in your drip system with the 3/4 in. MPT X 3/4 in. MHT Swivel Adapter. Convenient built-in swivel enables the end of the fitting to turn when attaching or removing it to keep tubing straight and prevent kinking. The fitting threads onto a 3/4 in. MPT connection point on one end and threads onto 3/4 in. MHT tubing on the other end. This adapter is made of acrylonitrile butadiene styrene (ABS) treated with UV inhibitors to prevent cracking.