A toilet bowl washer fluid reservoir drain valve spacer body is capable of mounting flapper action valves. The toilet bowl washer fluid reservoir drain valve spacer body includes a main body section which has a cone shape and is capable of being seated on a upper edge section of a drain valve seat in a fluid-tight manner. An opening section is provided at an underside of the main body section, and an upper edge section of cone-shaped main body section is capable of detachably fluidly sealing against an annular seal ring of the flapper action valve. Also provided is a holding section for holding an overflow pipe and supporting the flapper action valve in such a way as to be able to pivot the flapper action valve in a vertical direction, wherein the holding section protrudes from the main body section.