Advance Equipment and Services, Inc. AESINC is a global provider of custom skid-mounted water purification equipment such us seawater desalination plants, brackish reverse osmosis units, ultrafiltration, nano filtration and Softeners. We Sale - Resale - Finance - Lease - Operate reverse osmosis systems at the best rates facilitating the system that you need now. Different options available: feed pump skids, electrodeionization, MM filters, Ozone generators, UV systems as Pre-treatment and post-treatment units.