Providing a plain English look at the design and components of a DIY desalinator or watermaker used on smaller vessels. Water makers can be made from readily available components and even fully automated by the DIY'er. We also repair an ERS (energy recovery system) commercial unit and provide detail of its resultant operation. 'ALTERNATE PREVIEW' click 'View this Author's Spotlight' (left top, under 'J M COOMER'). In LINKS (upper right), click on 'Our BOOKS', even 'COMPARE with AMAZON'.