Preventive maintenance service contract for new water treatment plant filtration and softening systems (excluding chlorine generation equipment) at U.S. Embassy Kathmandu, including semi-annual mainte... Preventive maintenance service contract for new water treatment plant filtration and softening systems (excluding chlorine generation equipment) at U.S. Embassy Kathmandu, including semi-annual maintenance of all filters, pumps, softening systems, and controls with materials and parts, for one base year plus four (4) option years.