Amazon.com: Joywayus 1/2" NPT Thread Female × 3/4" G Thread Male Brass Pipe Fitting Adapter : Industrial & Scientific
316 Stainless Steel, 3/4 in x 1/2 in Fitting Pipe Size, Reducing Adapter - 14M046|12-8 RA-SS - Grainger
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
Everbilt 3/4 in. MHT x 1/2 in. FIP Brass Adapter Fitting 801729 - The Home Depot
Cubilan 3/4"GHT Male x 1/2"NPT Male Connector, Brass Garden Hose Adapter, Brass Garden Hose to Pipe NPT Fitting Connect B087FVZYCF - The Home Depot
Fitting 1/2" Npt Male X 1/4" Npt Female Adapter | Brass Connectors Adapter - 1/4 3/8 - Aliexpress
Steel Pipe Adapter Fitting 1/2 Female Npt x 3/4 Npt Male Water Oil Fuel Liquid | eBay
BrassCraft 1/2-in x 3/4-in Threaded Male Hose x Fip Adapter Fitting in the Brass Fittings department at Lowes.com
3/4" NPT Male x 1/2" NPT Male Straight 5404-12-08 Adapter | NPT Male to NPT Male - Hex Nipple | NPT to NPT | Hydraulic Adapters & Fittings | Hydraulics | www.surpluscenter.com