Everbilt 3/4 in. MHT x 1/2 in. MIP Brass Adapter Fitting 801799 - The Home Depot
Amazon.com: Joywayus 1/2" NPT Thread Female × 3/4" G Thread Male Brass Pipe Fitting Adapter : Industrial & Scientific
Horiznext npt 1/2-3/4 male to female thread reducer adapter, stainless steel connector for plumbing,shower hose, sink faucet, tub, air water gas line(2 pcs) - Amazon.com