DLA Troop Support Philadelphia is Currently looking for additional sources for NSN 4420-01-281-2470. This NSN is sole source to Aqua-Chem (CAGE 0EXU3) under part number 534-09630-000. All interested p... DLA Troop Support Philadelphia is Currently looking for additional sources for NSN 4420-01-281-2470. This NSN is sole source to Aqua-Chem (CAGE 0EXU3) under part number 534-09630-000. All interested parties must submit a technical data package for evaluation via the Engineering Support Activity. All packages must be sent to Hannah Ragel, hannah.q.ragel@dla.mil, by close of business June 26th, 2026