45592RE: Macerator Pump Installation
- Nov 24, 2013
I have a macerator pump and no y valves at all. As long as there are no leaks the effluent follows the suck. I also have pvc running out of the tank so that I don't have smelly stuff sitting in (eventually) permeable hoses. Seems to work well. Did I say no leaks. The shurflo I used comes with a paper gasket which failed and allowed air in and nothing would go out either discharge points. The paper gasket is not needed (why do they do that). I expect that a y valve would have allowed the pump out boat to pump the boat out.
---In Sabresailboat@yahoogroups.com, <jim@...> wrote:I've got Peggy's book on order, but I'd like the benefits of any thoughts and/or wisdom on the subject of macerator pumps and installation thereof. I'm in the process of designing an upgrade from a pro-forma mostly legal system to one that is potentially useable. The question at hand is how many Y-valves are actually required and where they should be located. Obviously there is at least one down stream from the head directing, er, effluent to either the though-hull or the holding tank. The two real questions are:
- Does there need to be a Y-valve (or even a simple one way valve) between the holding tank and the macerator pump so the deck pump-out will continue to work? It seems to me that backflow through the macerator pump should be minimal, if any, so no valve should be necessary.
- Does there need to be a Y-valve in the through-hull discharge line to prevent backflow into the head when the macerator pump is running, or is the joker valve in the head sufficient to prevent this?
A simple shutoff valve between the holding tank and macerator pump does seem like a prudent precaution to allow the pump to be removed if it failed or needed to be serviced. A Y-valve seems overkill.
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