This is a Request for Information (RFI) for market research purposes only. This is not a solicitation for proposals, proposal abstracts, or quotations. The purpose of this Request for Information (RFI) is to identify sources capable of providing a Commercial Off-The-Shelf (COTS) Reverse Osmosis Water Purification Unit (ROWPU) that can purify over 1,2 2 00 gallons of water per hour. The Government does not intend to award a contract on the basis of this RFI or to pay for the information solicited. The information provided will be used to assess market capabilities and refine future requirements. Description The Product Manager Engineer Systems, Portfolio Acquisition Executive Marine Corps (PAE MC), is conducting market research for potential sources of a ROWPU. This system is intended to replace the legacy Tactical Water Purification System (TWPS). The envisioned ROWPU will be a critical enabler for expeditionary forces, particularly those executing Expeditionary Advanced Base Operations (EABO), where success hinges on mobile, self-sufficient, and logistically light units. By producing potable water at the point of need, the ROWPU directly increases operational tempo while reducing the vulnerability of extended logistical supply lines. The system will be used across the full range of military operations, from combat support to Humanitarian Assistance/Disaster Relief (HA/DR). The ROWPU must address the deficiencies of the legacy system by being more supportable, reliable, and capable. It should be significantly lighter, have lower power requirements, and deliver enhanced performance, particularly in saltwater environments. The Marine Corps anticipates a procurement of 145 ROWPU systems under a potential 5-year Firm-Fixed-Price (FFP) Indefinite Delivery Indefinite Quantity (IDIQ) contract.