Yep, another vacuflush question, the vacuum tank

[The Brockerts]

My systems is just like below. Can someone tell me about the vacuum tank? Is the tank "full of black water"? Is there any plumbing inside?, When I flush does it empty completely? Does it hold "black water" between flushes ? What is it's purpose?

 

[Portage_Bay]

It's purpose is to build a volume of vacuum so that when you depress the pedal on the bowl the bowl is completely cleared. The force of the vacuum being pulled through the small orifice breaks up the solids, no macerator pump required. The system will not work well if at all without the tank.

After flushing t is not full of black water but some will remain. It's not a bad idea when leaving the boat to flush the system a few times to leave clean water in the tank.

VacuFlush: Get To Know The System

 

[HeadMistress]

I've written a piece that I call "VacuFlush 101" that explains how it works (an amazing number of owners think they do, but don't) and how much water it really needs to prevent 90% of problems with it. I'll be glad to send it you--and anyone else who wants it--if you'll send me an email (no way to attach anything to a PM) ...I'll attach it to a reply.

And btw...I love it that you still have the original 3 separate component system instead a "vacuum generator" that bundles the vacuum tank and vacuum pump, complicating maintenance.

--Peggie
peggie.hall@gmail.com

 

[ranger58sb]

Our system incoporates vaccum tank and pump into one, but these might help... at least conceptually:

VacuFlush: Get To Know The System - VacuFlush Toilet PARTS Diagrams - 508+ - Marine Sanitation & Supply​

marinesan.com

VacuFlush: Get To Know The System - VacuFlush Toilet PARTS Diagrams - 506+ - Marine Sanitation & Supply​

marinesan.com

Several consecutive freshwater flushes, including some with resting doses of something like NoFlex, can get the tank empty and "not gross" enough to work on.

-Chris

 

[HeadMistress]

Our system incoporates vaccum tank and pump into one,

It doesn't...they're still separate, but "bundled" together into a "vacuum generator" to save space and make doing things like replacing duckbill a major PITA.

As for cleaning out the vacuum tank...the hoses and pump need rinsing out too. The flush water flow is too wimpy to fill the hoses, and rinse out the system. The solution: flush a full bowl of clean water once a day.

--Peggie

 

[ranger58sb]

It doesn't...they're still separate, but "bundled" together into a "vacuum generator" to save space and make doing things like replacing duckbill a major PITA.

Ah, well, yes... but it's all the same "box" to take out of the boat when we need to work on it.

Not knowing any other version, it's all a PITA to me... compared to an electric macerating ter'let.

As for cleaning out the vacuum tank...the hoses and pump need rinsing out too. The flush water flow is too wimpy to fill the hoses, and rinse out the system. The solution: flush a full bowl of clean water once a day.

Yep, when I had to change our bellows (and duck bills while I was at it), I started flushing/rinsing the whole about 3 (or more?) days early, with full bowls and NoFlex or Cascade powder. Worked OK.

-Chris

 

[Bmarler]

When I service the pump, I strip it down and soak it in muriatic acid. A simple water rinse and it’s ready to assemble.