On our C&C we have a integral molded sump pan with a 1/2 inch hose conected to a strainer running under the teak shower grate floor. This hose connects to a Jabsco quad pump located under the handsink compartment. The outlet for the pump runs to a thru hull well above the waterline so when we shower we can pump the grey water out of the boat directly. We use another of the quad inlets as an empergency bilge pump out so it has a 20 ft 1/2 inch hose connected and coiled under the sink should the occasion arise.
Our manual bilge pump is 1 inch hose runs the length of the boat and out a thru hull above the waterline. The strum box ( Thanks for identifying the correct name saildog for it as I used to call it a spachetti strainer) is located in the lowest part of the bilge aft of the mast. Since we are a centerboard our bilge is faily shallow (12 inches and a flat run). It takes a fair amount of water to prime the diaphram pump. Make sure there are no holes in the 1 inch hose or you will be like Sisyphus rolling the rock up the hill only to have it roll down and start over.