The Nut,flange,6mm is the cheapest item from this partsfiche.
The ten Civic 1996 (t) 4dr Lx (ka,kl) Water Valve component parts are all listed in this schematic.
A sample from the products for the Water Valve include: Hose Water Outlet, Grom Heater Pipe, Valve Assy Water, Clamp, Water Hose 21.