EASTMAN 1/4-in Compression x 1/4-in Compression Brass Multi Turn Saddle valve at Lowes.com
Amazon.com: PEX Ice Maker Installation Kit – 25 Feet of Tubing For Appliance Water Lines With Self Piercing Saddle Valve For Quick Installation, 1/4” Compression Fittings, Flexible Hose For Potable Drinking Water : Appliances
Saddle valve on water line to ice maker on fridge. DIY by my dad 40 some years ago? Can't seem to get valve closed… don't want to break and cause a mess.
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
How to Install a Saddle Valve (Plumbing Tutorial) - YouTube
plumbing - What can I do about a saddle valve that won't turn on? - Home Improvement Stack Exchange
Saddle Valve Replacement on Main Hot Water Pipe | DIY Home Improvement Forum
plumbing - Why isn't my refrigerator water line delivering water? - Home Improvement Stack Exchange