Everpure RO SERVICE-LEVEL III provides comprehensive maintenance for one reverse osmosis (RO) system, specifically designed for models MRS-600 HE/HE-II and BWS1500. This service includes the replacement and flushing of cartridges, thorough checks of the RO system, and necessary adjustments to ensure optimal performance. Please note that cartridges are sold separately. Maintain the efficiency and longevity of your RO system with this professional service.