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Old 09-18-2019, 09:47 AM   #1
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Upgrade to vacuflush

I'm in the process of upgrading my Jabsco electric flush head to a vacuflush.

The discharge on the electric flush is 1". The discharge on the vacuflush in 1.5". This presents what appears to be a problem on the holding tank side.

I need a 1.5" barb on the holding tank where the 1" is located now.

Keeping the same size thread and going with a larger barb or dealing with reducers looks like it might create a bottleneck.

I doubt I can go with 1.5" to the vacuum generator, then 1" from the vacuum generator to the holding tank.......or can I? Without a macerator that would seem to lend itself to potential clogging issues.

Do I need to upgrade the holding tank as well?

What is the best way to approach this upgrade??
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Old 09-18-2019, 09:57 AM   #2
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I would tend to replace the 1” barb on the holding tank with 1.5”

The challenge is that the hole in the holding tank might be threaded to 1” NPT which will cause the same reduction you are trying to avoid. Hopefully it is threaded 1.5”.

Before I replaced the holding tank (unless it was super accessible) I would probably re-think the vaccuflush idea and go with a macerating head like the Raritan Sea Era

I have Vaccuflush and like them, but I am not in love with them either. I have had the Raritan Sea Era macerating heads in other boats and found them to be super reliable.
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Old 09-18-2019, 10:09 AM   #3
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Your post is lacking in pertinent detail. You don't indicate how the connection is made to the holding tank. Yes, I get that it's a 1" barb, but how's it connect to the tank? Top, side, threaded adapter, glassed in stub? What material is the tank constructed of? Give generalized information, receive generalized replies.


Depending on the tank construction, it may be a simple matter to connect to the tank using a universal tank adapter, or perhaps re-using the existing if it's suitable. In any case, run full size per the manufacturer's recommended install process.


Trying to re-use existing piping is only going to add problems to your conversion. Don't be concerned with how to adapt, get rid of the old stuff and treat it as a new install. You'll probably need new 1-1/2" hose from toilet to vac generator, also from generator to tank. Use the good hose, do it once.
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Old 09-18-2019, 11:59 AM   #4
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Quote:
Originally Posted by Shrew View Post
I'm in the process of upgrading my Jabsco electric flush head to a vacuflush.

The discharge on the electric flush is 1". The discharge on the vacuflush in 1.5". This presents what appears to be a problem on the holding tank side.

I need a 1.5" barb on the holding tank where the 1" is located now.

Keeping the same size thread and going with a larger barb or dealing with reducers looks like it might create a bottleneck.

Do I need to upgrade the holding tank as well?

Depending on which Jabsco electric you have, I'd have thought you might be taking an unnecessarily complicated step backwards by going to VacuFlush.

But that said...

Ideally, Peggie will chime in

And in the meantime, you could use a Uniseal to route a new 1.5" hose to the top of the holding tank -- and you can just cap off the existing 1" inlet barb if you do that. If the 1" inlet barb isn't actually 1.5" already, with a smaller fitting screwed into it. (1.5" is a pretty common inlet/outlet size for holding tanks; usually only the vent fittings are smaller, I think.)

FWIW, the discharge on our Jabsco electric is 1" but it's almost immediately stepped up to 1.5" just after the loop -- and using the Jabsco converter part -- for the 1.5" hose that makes the run to our holding tank.

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Old 09-18-2019, 12:14 PM   #5
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Gotta agree with the others about rethinking the switch to Vacuflush. Many of us with Vacuflush are considering upgrading to an electric macerating head. Seems like you're taking a step back.
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Old 09-18-2019, 12:43 PM   #6
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I would not put in a Vacuflush but rather a Raritan Marine Elegance. Much less complicated and no vacuum generator, etc. i just ordered a Marine Elegance yesterday, $720 and I will be done. It will use the 1Ē discharge hose with a simple adapter. You never see threads about problems with a Marine Elegance but you see threads all the time about problems with a Vacuflush. Ask Peggie for advise as to which she would install if it were her boat...
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Old 09-18-2019, 01:31 PM   #7
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The Raritan Marine Elegance gets lots of love everywhere... while the Jabsco 37045 Quiet Flush, not so much. I've not experienced an ME first-hand so can't compare head to head (so to speak), but our Jabsco electric macerating QF works pretty well.

If the QF would be an upgrade for OP from a different Jabsco electric (37010?) and if it would mount exactly the same as the original unit, that could very much simplify the whole upgrade process.

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Old 09-18-2019, 01:40 PM   #8
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Quote:
Originally Posted by Shrew View Post
I'm in the process of upgrading my Jabsco electric flush head to a vacuflush.

The discharge on the electric flush is 1". The discharge on the vacuflush in 1.5". This presents what appears to be a problem on the holding tank side.

I need a 1.5" barb on the holding tank where the 1" is located now.

Keeping the same size thread and going with a larger barb or dealing with reducers looks like it might create a bottleneck.

I doubt I can go with 1.5" to the vacuum generator, then 1" from the vacuum generator to the holding tank.......or can I? Without a macerator that would seem to lend itself to potential clogging issues.

Do I need to upgrade the holding tank as well?

What is the best way to approach this upgrade??
Why on earth would you think going back to 1980s technology that is noisy and high maintenance would be an "upgrade"?! Find a dock neighbor with a modern electric fresh water flush (Tecma, Headhunter or similar) who will allow you to do a little testing....I think you will be impressed.
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Old 09-18-2019, 01:45 PM   #9
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It's a poly tank with the inlet on the top. It looks like it's threaded, though I didn't measure it. I want to moving to vacuflush for a few reasons.

1) Holding tank capacity: The electric flush uses raw water and far too much of it. I have a 30 gallon holding tank that I need to empty more frequently than I would like.

2) Odor: The electric flush uses raw water. I only use the boat on weekends. The saltwater leaves an odor in the head after baking in the heat for a week.

3) Noise: The electric flush is loud

I'm surprised moving to a vacuflush is considered a move backwards. I really haven't seen many new boats sold with electric flush in recent years.

The platform the head is located on has limited space, as a result, I am limited in the models I can install.
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Old 09-18-2019, 01:46 PM   #10
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From my experience the Jabsco Quiet Flush isnít. The Raritan ME is pretty quiet and part prices arenít stratospheric either. Before you lock yourself into Vacuflush price out the spare parts. They control the distribution so the prices stay high.
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Old 09-18-2019, 01:49 PM   #11
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Ask Peggie about how much water Vacuflush actually use, not their sales pitch. The Marine Elegance can be fresh water flush if you choose that setup. I just ordered one yesterday for our current boat. We put one in a previous boat and I didn’t think it was loud. I think that the ME will not use any more water than a Vacuflush and the ME can use 1” discharge so you can flush it completely with less water.
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Old 09-18-2019, 01:58 PM   #12
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OK I'm definitely listening. I'm surprised at the consistency of the replies leaning towards electric.

I'm obviously still open to thoughts either way. My concern with going to a freshwater electric flush was increased usage of the freshwater and I still have the flush capacity issue.

I'll crunch some numbers on flush volume. I admit I am going by marketing fluff.
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Old 09-18-2019, 02:00 PM   #13
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My concern with going to a freshwater electric flush was increased usage of the freshwater....
Full disclosure....I have 2 x 60 gallon FW tanks and I use the boat on weekends and up to 2 weeks at a time on vacation. Fresh Water consumption is much, much lower on my list of concerns.
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Old 09-18-2019, 03:10 PM   #14
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As far as consumption...

The vaccuflush can flush pee and use very little water.

But... So can the modern electric heads.

The challenge with this is that you need to run water through the hoses along with the pee to avoid a buildup that occurs.

Poop wise the vaccuflush will empty the bowel pretty well with one flush as long as you add water to the bowel before hand.

That said, you really want the poop to not stay in the hoses so we always double flush.

I am thinking that with a modern electric fresh water head you will get the same water usage as the vaccuflush.

Now lets think maintenance. The vaccuflush will require occasional maintenance like anything else. Basically every couple years you will need to replace the duckbills. Other than that the only thing you do is break-fix, and they are pretty reliable. I have had zero break-fix issues in several years of use.

In order to maintain the vaccuflush you will need to be able to get to it. That is not a vaccuflush issue, that is a installation issue, but it is a concern. They are EASY to work on IF you can get to them.

A modern electric head is designed to be maintained while mounted. That solves some installation challenges as you do not need to figure out an accessible space.

Something else to consider is the toilets themselves. The vaccuflush heads are a down discharge, like a house toilet. They might make an adapter kit, but the ones I have seen are down discharge. A modern electric head can go either downward for the discharge, or backwards. Again, not a problem with Vaccuflush, but a consideration all the same.
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Old 09-18-2019, 03:20 PM   #15
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A couple of points;

one, what does a complete new Vacuflush system cost? I donít know. I would compare that to a new Marine Elegance. I just bought one for $739.

Two, people that have Vacuflush systems say they are no more maintenance than a ME. Ok, users that are good with the search function see how many threads there are on Vacuflush maintenance and how many there are on ME. I personally have not seen any on the ME but there is almost always a thread ongoing on the Vacuflush. Maybe that isnít indicative of anything but pure and simple the Vacuflush system, note I say system, are more complex than a ME toilet, note I donít say system. If I do have a problem with a ME head, I know it is right there inside the head unless I clogged the discharge hose. If I have a problem with a Vacuflush, first I have to find out where the problem is, in the head, the vacuum generator or the rest of the system. Why would you want something that much more complex?
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Old 09-18-2019, 03:40 PM   #16
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A couple of points;

one, what does a complete new Vacuflush system cost? I donít know. I would compare that to a new Marine Elegance. I just bought one for $739.

Two, people that have Vacuflush systems say they are no more maintenance than a ME. Ok, users that are good with the search function see how many threads there are on Vacuflush maintenance and how many there are on ME. I personally have not seen any on the ME but there is almost always a thread ongoing on the Vacuflush. Maybe that isnít indicative of anything but pure and simple the Vacuflush system, note I say system, are more complex than a ME toilet, note I donít say system. If I do have a problem with a ME head, I know it is right there inside the head unless I clogged the discharge hose. If I have a problem with a Vacuflush, first I have to find out where the problem is, in the head, the vacuum generator or the rest of the system. Why would you want something that much more complex?
OK, as far as I am concerned Everything Raritan makes is TOP quality. I am a Huge fan.

Vacuflush gets more complaints and threads because they have been out there for a very long time, and there is a HUGE installed customer base. As they age they have issues, and the threads I see are mostly folks that have no understanding of them, looking for knowledge, and are trying to fix something that has had no maintenance on sometimes for a decade, that they have no clue how it works.

As far as complexity yes I agree they are more complex. A electric macerating head is simple by comparison. That said, a vacuflush system is easy to work on, and easy to understand once you look at it.

All that said... If I were starting fresh I would not have vacuflush, I would choose one of the Raritan macerating toilets and go about my happy life.
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Old 09-18-2019, 04:15 PM   #17
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I like my Vacuflushes and might buy them again if I were building a new boat. To me, they're incredibly simple to work on and I don't have to worry about a macerator dying (I can change the electric motor without disturbing the plumbing and replacing the diaphragm plunger is part of my 5 year maintenance).

Regarding going from 1.5" to 1", there is a hose barb union that does that with a smooth bore. Peggy quoted someone who described the vacuum pump as a "Turd masher". She could better qualify if this reduced the size to a manageable level for 1" pipe.

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Old 09-18-2019, 06:32 PM   #18
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I would not put in a Vacuflush but rather a Raritan Marine Elegance. Much less complicated and no vacuum generator, etc. i just ordered a Marine Elegance yesterday, $720 and I will be done. It will use the 1Ē discharge hose with a simple adapter. You never see threads about problems with a Marine Elegance but you see threads all the time about problems with a Vacuflush. Ask Peggie for advise as to which she would install if it were her boat...
Agree 100%. Vacuflush is a step down, not up. There is a poster hete named vacutech. There are no Marine Elegance techs. Simply not needed.
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Old 09-18-2019, 08:22 PM   #19
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Agree 100%. Vacuflush is a step down, not up. There is a poster hete named vacutech. There are no Marine Elegance techs. Simply not needed.
That's true, and maybe when Marine Elegance has reached 10% of the units sold in the marine and RV industry by Vacuflush, someone will.

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Old 09-18-2019, 08:49 PM   #20
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I can't comment on VF as an owner....
But I have helped a dockmate work on his relatively new boat a few times. From what I've seen I would not consider converting my macerator to a VF even if someone gave it to me. Vacuum is pretty finicky and there are just too many potential places for me. Several slip fits for vacuum is not a robust design IMO.
I have had a couple nscersting toilets in last 2 boats and never s major problem. I have replaced the maintenance kit parts, impeller, seals etc but that's relatively inexpensive, infrequent and easy to do.
Just another opinion but it seems I'm not alone.
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