The lowest price component in this Water Valve parts-list fiche is the Bolt-wash.,6x16.
Some items from this specific schematic: Bolt-wash.,6x16, Clamp,htr Hose, Valve Assy,water, Clamp,htr Hose.
With a quantity of six pieces, the Clamp, Water Hose 21 is the most used part in the WATER VALVE diagram.