The component with the lowest price in the WATER PUMP schematic is the Bolt,flange,6x14.
Parts such as the Water Pump: Pkg,thermo Cover, Tube,bypass Hose, Clamp, Water Hose, Pump Comp,water are included in the Civic 1973 3dr1200 (ka) Water Pump parts fiche.
The Water Pump assembly is constructed from several parts from which the Pump Comp,water is the most expensive.