This is a market research Sources Sought notice for preventative maintenance services on four specific reverse osmosis water purification machines at Keesler Air Force Base in Biloxi, Mississippi. The performance period is a base year from June 2026 through May 2027, with four potential option years extending through May 2031. The notice explicitly states this is not a request for proposals, and responses will be used to determine the procurement method. Interested parties must submit a capabilities statement via email by a specified deadline and be registered in SAM.gov. The work must comply with OEM specifications, a performance work statement, and several medical and technical standards.