Hi Check the pH first. ...

Hi

Check the pH first. Maybe it's only a caustic-like smell that may be caused by the type of plastic vessels and piping or if your DM process is based on exchange resins , then it can happen especially after regeneration of resins. If so, an activated carbon process is needed. Also, make sure you chose the right kind of resin. Normally for DM, you should use Strong base and acid resins. Sometimes if you use sodium chloride based resins and regen it with acid and base, then you may face such a problem.