I installed a WD system on my Vision 40 a few years ago. I used a Shurflo ProBlaster pump and located it aft near the head compartment so that I could tap into an existing thru-hull (I added a diverter valve to the inlet for sea water flush supply to the head). There is a strainer in the line between the thru-hull and the pump. I ran the discharge hose forward to the anchor locker by following the wiring chase behind the cabinetry just below the hull/deck joint. This hose terminates at a bronze faucet in the anchor locker and a 50 foot flexible hose with nozzle is attached.
I sail on the Chesapeake and anchor a lot in very messy mud so the WD system is a life saver.