This is a Request for Information (RFI) for market research to identify sources for a Commercial Off-The-Shelf Reverse Osmosis Water Purification Unit (ROWPU) that can purify over 1,200 gallons of water per hour. The system is intended to replace the legacy Tactical Water Purification System for expeditionary forces, requiring a lighter, more reliable design with lower power needs, especially for saltwater use. The Marine Corps anticipates a potential 5-year Firm-Fixed-Price Indefinite Delivery Indefinite Quantity contract for 145 systems. No specific budget amount or performance location is mentioned in the description. No submission timelines are provided as this is a market research RFI only.