It is absolutely essential that you ONLY replace failed units with exact replacements.  Any subsitutions will void all warranties.

To replace a Unified Burst Disk Assembly, simply unscrew the failed unit, and discard it.  They are NOT serviceable.

Screw in the new replacement unit and torque with torque wrench to 55 inch-pounds.  Do not over-torque.

Call PMI at 1-800-579-1633 with any questions or email techsupport@pminetwork.com