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
Orbit 1/2 in. x 3/4 in. MNPT Poly Adapter 37217 - The Home Depot
Amazon.com: Sunex 2302, 1/2 Inch Drive, 1/2" Female x 3/4" Male Impact Adapter, Cr-Mo Steel, Ball Detent, Tapered Square End, Meets ANSI Standards : Tools & Home Improvement
Apollo 3/4 in. Brass PEX-B Barb x 1/2 in. Male Pipe Thread Reducing Adapter APXMA1234 - The Home Depot
PROTO, 1/4 in_3/8 in_1/2 in Output Drive Size, Square, Socket Adapter Set - 19C375|JHA4S - Grainger
BrassCraft 1/2-in x 3/4-in Threaded Male Hose x Fip Adapter Fitting in the Brass Fittings department at Lowes.com
Everbilt 3/4 in. MHT x 3/4 MIP or 1/2 in. FIP Brass Multi Adapter Fitting 801709 - The Home Depot
TEKTON 3/4-in to 1/4-in; 3/8-in; 1/2-in Standard Socket Adapter in the Socket Adapters department at Lowes.com
DURA 1/2 in. x 3/4 in. Schedule 40 PVC Slip x FIPT Reducing Female Adapter Fitting U435-074 - The Home Depot
3/4" x 1/2" Schedule 40 PVC Female Adaptor Socket x FPT, 435-101
Everbilt 3/4 in. MHT x 1/2 in. MIP Brass Adapter Fitting 801799 - The Home Depot
Reducer 3/4" to 1/2" Npt Female Pipe Adapter Coupler Brass Fitting Water Oil Gas | eBay
Amazon.com: Brass Pipe Fitting,3/4 Inch NPT Male to 1/2 Inch NPT Female Brass Pipe Hose Tube Fitting Hex Head Bushing Adapter Convert (3, 1/2 NPT female x 3/4 NPT male) : Industrial & Scientific