Last month while in the exumas on the 110’ lazzara I got an alarm showing the mid ship bilge pump running briefly. Going once, going twice… time to check. Opened the hatch in one of the guest rooms and found water leaking out of cracked fitting on a diaphragm pump used to get the very last of the water out of the bilge. Salt water. Coming out of the discharge fitting. manual showed that pump discharge running aft and over board out of the ER took me a little while to realize the water was not just salty but very salty…. Yep, water maker was running and somehow the brine discharge was backing up into that pump and now into the bilge thanks to a cracked fitting. turned out that whoever installed the watermaker 17 years ago, tee’d the brine discharge into the bilge pump discharge. No idea if it was a factory job or an installer or if someone modified it at some point…. Just when you think you ve seen it all.
On a customers boat, we learned: Don't flood the potable tank with dock water, WHEN the water-maker charcoal filter is removed and apart. The tank fills, and the T fitting from the water-maker leads water to the laz where the RO and lots of other items are stored. If the final fresh water filter is off, the whole area gets very wet,, quickly. A nylon check valve fixed it quickly after discovery.