Everbilt 3/16 in. Barb x 1/4 in. MIP Brass Adapter Fitting 800109 - The Home Depot
1/4" Male NPT x 3/16" Compression Brass Elbow Adapter
Amazon.com: Beduan Brass Hose Barb Reducer, 1/4" to 3/16" Barb Hose ID, Reducing Barb Brabed Fitting Splicer Mender Union Air Water Fuel : Industrial & Scientific
Amazon.com: Beduan Brass Hose Barb Reducer, 5/16" to 1/4" Barb Hose ID, Reducing Barb Brabed Fitting Splicer Mender Union Air Water Fuel : Industrial & Scientific
5 Pcs Brass Compression Fitting Reducer Union Connector 3/16" X 1/4" Tube OD | eBay
Brass Straight Reducer Compression Fittings Connectors Fit 3/16" Tube OD Brake Lines Union Adapters 229 PSI
BrassCraft 5/16-in x 1/4-in Compression Reducing Union Coupling Fitting in the Brass Fittings department at Lowes.com
Amazon.com: JoyTube Brass Hose Barb reducer 1/4" to 3/16" ID hose Barb Fitting Hex Splicer Mender Union Air Water Fuel Tubing Adapter with hose clamps (Pack of 3) : Industrial & Scientific
LTWFITTING 3/16 in. I.D. Brass Hose Barb Splicer Fittings (10-Pack) HF39130310 - The Home Depot
Midland Metal Mfg. 18077 1/4 X 3/16 Reducing Comp Union, Brass Fittings, Compression, Reducing Union | Blackhawk Supply
JEGS 555-63077: Brass Adapter Fitting | 3/8 in.-24 Male Thread for 3/16 in. Brake Line | 7/16 in.-24 Female Thread Inverted Flare for 1/4 in. Brake Line | Set of 2 - JEGS