3 inch TC cap with ball lock fitting and pressure relief valve
$30
santa cruz, ca
https://www.norcalbrewingsolutions....-Pressure-Relief-Valve-3-Inch-Tri-Clover.html
$30
santa cruz, ca
https://www.norcalbrewingsolutions....-Pressure-Relief-Valve-3-Inch-Tri-Clover.html