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
1-1/2" to 1-3/4" Inch Hose Barb Splice Coupler Repair Reducer Fitting Adapter | AN627-28-24A - ICT Billet
3/4" To 1/2" EMT Conduit Standard Adapter Shim - Maker Pipe
3/4" NPT to 1/2" Pipe Bushing Adapter Convert 1/2 Male to 3/4 Male Solid Brass Water Gas Air Hydraulic: Amazon.com: Industrial & Scientific
Everbilt 3/4 in. x 1/2 in. Copper Pressure Cup x Female Adapter Fitting C603HD3412 - The Home Depot
3 Piece Socket Adapter Set Increasing 3/8" 1/2" 3/4" Female 1/4" 3/8" 1/2" Male - Walmart.com
3/4" Male x 1/4" Female NPT Hex Bushing Adapter Pipe Reducer Brass Fit – compressor-source
3/4" x 1/2" Schedule 40 PVC Female Adaptor Socket x FPT, 435-101