Pressure tank and bubbler

Both pressure tank and bubbler are constructed using 3 OD stainless tubing with welded and tapped stainless steel end caps. The bubbler contains a stainless steel tube which is welded to the top cap. This tube has a stainless steel screen welded to the outlet on the bottom of the tube. 

Although only one bubbler was used, this system was originally designed to have two bubble chambers. However, at least two bubblers should be used - one bubbler with vinegar to neutralize the KOH, and the other bubbler with distilled water. 

The electrolyzer body consists of a threaded stainless steel pipe nipple with drilled and tapped holes for positive electrodes. The top and bottom caps are stainless steel flanges (four flanges in total) with flange seals and bolts and nuts. 

The steel flanges make this electrolyzer very heavy. Another option would be to use pipe caps or disks such as used in the bubbler and pressure chamber. We used the flanges because we wanted a system that could be used for other higher pressure experiments at a later date. For a low pressure system, a much lighter electrolyzer could be constructed using, for instance, 3 or 4 diameter steel tubing with welded end caps. Please note that any changes to 

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