Deletion of Courtesy flush

Comment: the second source asserts that "Courtesy Flush" is a product. The first source is not a |reliable one, given anyone can edit it (yeah, I know...), there seems to be no indication that this is a |notable subject, or widely used, never mind having gained significant coverage in independent... etc. So fails , also fails ... definite delete, unless you can prove notability and... actual useage
Stance: delete
Cited policy: Wikipedia:Reliable sources (WP:RS||WP:N||WP:N||WP:V)