Abstract: An insulating end cap for a cylindrical electrolysis cell the type comprising at least two tubular electrodes with a cylindrical membrane arranged co-axially between them, comprises a first annular section with first and second axial ends, having at its first axial end a circular seating or one end of an outer cylindrical electrode and at its second end a circular aperture, of smaller diameter than the circular seating and co-axial therewith, to accommodate one end of the membrane. A second annular section of the end cap is detachably secured to the first and has a central circular aperture of smaller diameter than the central aperture of the first section and co-axial therewith, to accommodate one end of the inner cylindrical electrode. The two part construction of the end cap facilitates the assembly of the cell, and reduces the likelihood of breakage of the fragile ceramic membrane.

Abstract: A compression sealable electrolysis cell that is easily and reliably manufactured, maintained and repaired comprises two insulating end pieces which can position and seal two electrode tubes with electrical contacts separated by a ceramic membrane tube where fluid can be introduced at one end piece and removed at the other end piece in the spaces between the electrode tubes and the ceramic membrane tube. The design permits the compression of the entire assembly via the fixing of nuts on one or more threaded rods extending through both end pieces without the use of an adhesive or cement and without the imposition of torque or compressive stress on the ceramic membrane tube. The water or other fluid to be electrolyzed can be introduced tangentially to spaces between the electrode tubes and the ceramic membrane tube at a angle of 0 to 15 degrees to optimize flow and contact with the electrode tubes.