Explosion safe electrolysis unit

A dual-chamber electrolysis vessel configured for safe storage of HHO gas for use by an internal combustion engine, comprising:

• i) reusable container components, comprising:
• a) upper and lower cylindrical members aligned along a common central axis;
• and
• b) a middle plate between the upper and lower cylindrical members, the middle plate dividing an interior of the vessel into a first chamber and a second chamber, the first chamber containing an electrolysis cell, the electrolysis cell configured to produce HHO gas;
• and
• c) a first endplate adapted to one end of the upper cylindrical member, wherein the first endplate is a pressure release member;
• and
• ii) a replaceable pressure retaining and relief system, the replaceable pressure retaining and relief system configured to—
• a) retain the reusable container components in a fixed configuration when the contents of the vessel are below a relief pressure;
• and
• b) allow reuse of the reusable container components without repair by releasing contents of the vessel at the relief pressure.