Everbilt 3/4 in. MHT x 3/4 MIP or 1/2 in. FIP Brass Multi Adapter Fitting 801709 - The Home Depot
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
DURA 1/2 in. x 3/4 in. Schedule 40 PVC Slip x FIPT Reducing Female Adapter Fitting U435-074 - The Home Depot
Orbit 1/2 in. x 3/4 in. MNPT Poly Adapter 37217 - The Home Depot
Apollo 3/4 in. Brass PEX-B Barb x 1/2 in. Male Pipe Thread Reducing Adapter APXMA1234 - The Home Depot
Everbilt 3/4 in. MHT x 1/2 in. MIP Brass Adapter Fitting 801799 - The Home Depot
BrassCraft 1/2-in x 3/4-in Threaded Male Hose x Fip Adapter Fitting in the Brass Fittings department at Lowes.com
Joywayus Hose Barb Reducer 1/2" to 3/4" Barb Fitting Reducing Splicer, Hex Union Brass Fitting Water/Fuel/Air: Amazon.com: Industrial & Scientific
Amazon.com: TEKTON 3/4 Inch Drive (F) x 1/2 Inch (M) Impact Reducer | 47823 : Tools & Home Improvement