Hardware Made Easy!
Various
4" x 4" flexible coupling, socket to pipe connection.
Frost King Foam Elbow Pipe Insulation Polyethylene
Tigre Combination Tee (Insert X Insert X Mipt)
Elkhart Products 90° Elbow-Close Ruff
Abbott Rubber Polyethylene Tubing
Eastman Flare Male Gas Half Union (Tapped FIP)