where to put washdown pump?

[Wildman]

Check out the Rule Tournament series pumps, they mount directly on a seacock, and have a port for a wash down. The port is 'non powered', you will still need a washdown pump (or kit). Then you can mount your wash down pump anywhere, above or below deck. I am tucking mine under the transom cap so I can rinse it off with fresh water once in a while.