4001 Saddle Valve
List Price: $19.38 Sale Price: $15.50
Replacement saddle valve for any brand of humidifier. Straps onto 1/2 inch ID copper pipe and has a self piercing valve on it. Allows you to connect a 1/4 inch copper tube to the valve using a compression connection.
Excellent Saddle Valve by Linda Korrow ( NY US)
This is a high quality product. My previous one was a light-weight piece of junk and was leaking. I didn't know what to expect and was pleasantly surprised.