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post #1 of Old 05-15-2011 Thread Starter
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Macerator or diaphram pump to empty holding tank?

I'm in the middle of adding a holding tank to my Windward 850 and now have a decision to make; what kind of pump to use.

I was planning on a macerator pump; no real chance of clogging, the output finely shredded and so on. I even bought one.

But it just occured to me that unless the pump is higher than the seacock/throughhull (which it won't be), there will be sewage left in the line. This just sounds like a bad idea.

I would think that a diaphram style pump would be able to "pressurize" the line and therefore pump everything out, making it the better choice.

Am I missing something?

Thanks for any thoughts.

alanrothenbush is offline  
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