This 1" x 1" copper cap is from Quick Fitting. It is a push-to-connect fitting meaning it installs in seconds on copper, PEX, PE-RT, and CPVC. The fitting is removable and reusable. No glue or flames are required. Certified lead-free. Quick Fitting part number CH836R.
EC Part Number: #19231
Manufacturer Number: CH836R
Manufacturer: Quick Fitting