Shower sump
Alans,I had the same "cheap trick" on my 2004 Hunter 386. Initially, I couldn't find how the showers were plumbed. I have two floor drains, but only the shower had a hose underneath the drain which lead to a pump for discharging grey water overboard. The pump was controlled by an ON/OFF switch by the lavatory. The drain in front of the lavatory had no hose on it and water just flowed into the bilge.I corrected both problems by removing the flooring next to the lavatory. I was able to "T" a hose from lavatory drain and connect it to the shower drain. From there, I disconnected the ON/OFF switch by combining the {+) wires together. This allowed the sump pump to be controlled by the panel breaker. In the bilge, I installed a water collection box with a float switch. In addition to the lav/shower drains, I also connected the A/C condensation line as well as the freezer/refri defrost lines. Now all excess water goes into the collection box. When the water trips the float switch it all goes overboard. For a few bucks, it seems Hunter could have done a better design job. But, then again, how many new sailboat buyers actually look at plumbing? Or for that matter, anything mechanical until long after the sale is done!