This 1.5 in TriClamp pressure and the vacuum relief valve is a great way to protect your BrewBuilt tank. It will relieve pressure over 1.5 BAR but will also let in air if the tank is a vacuum inside to prevent the tank from imploding via cold crashing without adding pressure.

Features:

• Relief pressure: 1.5 BAR (22 psi)
• Allows pressure in during a vacuum
• Beaded 1.5 Inch Tri-Clover Compatible