Use a Saddle Valve to Quickly Connect a Refrigerator Water Supply
Ice Maker Saddle Valve | McCombs Supply Co | CSV2LL
CSV2LL Self tapping saddle valve with 1/4" compression outlets. – Express Parts Direct
2 Pcs Brass Self Piercing Saddle Valve Copper Self Tapping Valve with 1/4 Inch Compression Outlet for 3/8 to 1-5/16 Inch Water Pipe Supply - Amazon.com
AllTek Saddle Tap Pinch Valve
Do it Low Lead Self-Piercing Tap Valve - Anderson Lumber