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post #15 of Old 06-17-2012
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Re: Galley sinks in Crealock 37

Since the subject of macerator pump noise has come up, I'll offer a few tips we learned with our galley sink macerator. Originally our pump was mounted horizontally, and when it pumped the hose from the sink empty the noise that came up through the sink was like a car horn blasting. We re-mounted it vertically with the inlet down so that the hose from the sink formed a "J" trap shape. The reduction in noise caused by the little bit of water remaining in the bottom of the hose is significant. Also, allowing a bit of extra hose length in the "J" section of hose creates a sump effect, that reduces how often you need to use the pump. Our pump outlet hose is routed up to deck level inside the galley cabinets, then back down to it's own thru-hull just above the waterline. I have been thinking of adding a vented-loop to the hose, but have not done it yet.

Crealock 37 #151
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