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.
Use a Saddle Valve to Quickly Connect a Refrigerator Water Supply
What is a saddle valve? | Plumbers Connecticut | Rapid Service Plumbing, Heating, Electric
How to Install a Saddle Valve (Plumbing Tutorial) - YouTube
How to Install a Self-Piercing Saddle Valve
Dial 1/4-in 3/8-in Brass Multi Turn Saddle valve in the Shut-Off Valves department at Lowes.com
Saddle valve - Wikipedia
I've got a leaking saddle valve that runs water to my fridge. Replace with new saddle valve? : r/Plumbing
Brass 1/4-in OD Self-Tapping Saddle Valve | BK Products
plumbing - How do I fix a leak at a decommissioned saddle-valve? - Home Improvement Stack Exchange
Replace a Saddle Valve in 5 Minutes to Fix, Repair Water Pipe Pin Valve - YouTube
Self-Piercing Saddle Valve - Bulk Reef Supply
How to Install a Self-Piercing Saddle Valve
How to Install a Saddle Valve, Tips & Guidelines - CheckThisHouse
Saddle Valves - Watts
Why You Should Never Use A Saddle Valve on Your Plumbing - YouTube
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
Everbilt 3/8 in. OD Compression Brass Saddle Valve Fitting 800489 - The Home Depot
Installing saddle valves
DIAL 1/4 in. Evaporative Cooler Self-Tapping Saddle Valve 92685 - The Home Depot