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Old 10-28-2020, 10:48 AM   #1
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Vacuflush Toilets

Good morning
New to me 1997 Mainship 350 Trawler.
Going through all the systems and crawling thru all the hatches on the boat to see what's what. This boat has a Vacu flush freshwater toilet installed by a previous owner in her past. Works fine. My question is the discharge hose from toilet to holding tank is plumbed with 1 inch sanitary hose to the holding tank. Shouldn't this be 1 1/2 inch? Its a fairly long run with several turns to the holding tank.
Have some odors in the boat and I was going to change the discharge hose in the process of elimination.
Thanks
Jim
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Old 10-28-2020, 10:54 AM   #2
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Mine had 1.5" A quick internet search shows every model of Vacuflush that came up spec'd with 1.5".

Each model also specifies the maximum vertical and horizontal run for the discharge.
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Old 10-28-2020, 11:59 AM   #3
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Just completed a rebuild top to bottom of a vacuflush systems (1990 Californian MY) because of odor and plugged vent lines. Everything was an is 1.5 inches. I'm guessing a reducer is in your connections/lines somewhere.

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Old 10-28-2020, 12:38 PM   #4
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Good morning
New to me 1997 Mainship 350 Trawler.
Going through all the systems and crawling thru all the hatches on the boat to see what's what. This boat has a Vacu flush freshwater toilet installed by a previous owner in her past. Works fine. My question is the discharge hose from toilet to holding tank is plumbed with 1 inch sanitary hose to the holding tank. Shouldn't this be 1 1/2 inch? Its a fairly long run with several turns to the holding tank.
Have some odors in the boat and I was going to change the discharge hose in the process of elimination.
Thanks
Jim
Just a thought, before you get too far into this and since you have a long run, you might evaluate whether there was a structural reason for the reduction in diameter of the discharge hose (small opening, tight turn etc).

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Old 10-28-2020, 12:41 PM   #5
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On some heads you have the option of using 1Ē. My Marine Elegance has this option and I went with 1Ē so it doesnít take as much water to completely flush the stuff into the tank. Maybe Vacuflush has this option, I donít know. But I do know that if you are going to replace the hose, the only hose I would use is Raritan SaniFlex. I get it at Defender, they had the best price at the time I was buying mine. Also I would only use AWAB or ABA hose clamps. They are 316 S/S and donít have the open slots for the screw threads so they donít cut the hose. They also have rolled edges so the hose doesnít get cut there. Good luck and have fun. When I replace holding tank hose I sorta screw paper towels into the end of the hose as soon as I take the hose off and then tape over the end with duct tape. Then the stuff in the hose wonít leak out while you are pulling the old hose out.
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Old 10-28-2020, 12:47 PM   #6
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It should be 1.5" hose.

1.5" hose is used for the following:

Manual Flush heads: Main Line from head
Vacu-flush Head: Main line from head
Holding tank -> Pump-out deck plate
Holding tank -> Macerator

1" Line is used for the following:

Electric Head with onboard Macerator: Main line from head
Discharge Macerator -> Through hull

I wouldn't want to run a 1" line from head to holding tank without a macerator involved.
That model came stock with an Electric head and a 1" main discharge line. I would bet a previous owner upgraded to a vacu-flush and kept the stock sanitation lines.
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Old 10-28-2020, 03:18 PM   #7
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If it's a long run and you can get straight lengths into the space, pipe it in PVC-DWV. You can bend PVC if you heat it, it's cheap, it will NEVER permeate, don't be concerned about using it on board re: rigidity, it will flex enough, not a problem. It will offer less resistance to flow. Even if you need to couple it to get the lengths, it's way better than hose. Transitions to hose can be made with a barbless hose cuff that gives a smooth ID to minimize potential blockage.



And, YES, it should be 1-1/2".
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Old 10-28-2020, 03:30 PM   #8
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Or, you could get rid of the Vacuflush now and go back to an electric head with a macerator. Replace the discharge hose with new 1" hose and call it a day. Save yourself the future headaches that your vacuflush has planned for you. Put it in the dumpster where it belongs.


I'm only half kidding. If it means a bunch of work just to save the vacuflush, don't do it. It's a terrible system, the worst system on my Mainship, by far.
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Old 10-28-2020, 03:37 PM   #9
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Or, you could get rid of the Vacuflush now and go back to an electric head with a macerator. Replace the discharge hose with new 1" hose and call it a day. Save yourself the future headaches that your vacuflush has planned for you. Put it in the dumpster where it belongs.


I'm only half kidding. If it means a bunch of work just to save the vacuflush, don't do it. It's a terrible system, the worst system on my Mainship, by far.
Is/was your Mainship stock with electric toilet and 1" hose?
What pleasures await me with a vacuflush head? Please do tell all.
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Old 10-28-2020, 03:41 PM   #10
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Or, you could get rid of the Vacuflush now and go back to an electric head with a macerator. Replace the discharge hose with new 1" hose and call it a day. Save yourself the future headaches that your vacuflush has planned for you. Put it in the dumpster where it belongs.


I'm only half kidding. If it means a bunch of work just to save the vacuflush, don't do it. It's a terrible system, the worst system on my Mainship, by far.
Glad you said it so I didnít have to. I agree 100%.
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Old 10-28-2020, 03:45 PM   #11
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Is/was your Mainship stock with electric toilet and 1" hose?
What pleasures await me with a vacuflush head? Please do tell all.
Search the forum. You will find a multitude of threads on VF problems and how to fix them. I am a huge fan of Ratitan Marine Elegance heads. They are a fairly simple macerating electric head. No vacuum generators, no tough to find vacuum leaks, and a lot less real estate dedicated to the head system. Just the head and holding tank. And we have not even mentioned prices of parts...
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Old 10-28-2020, 04:18 PM   #12
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Is/was your Mainship stock with electric toilet and 1" hose?
What pleasures await me with a vacuflush head? Please do tell all.

Yes, our 2005 400 came from the factory with a Vacuflush system, which it still has, regrettably. The hoses are 1.5". At this point the only original parts left are the toilet itself (just the porcelain part, none of the guts) and the hose. Everything else has been replaced in the seven years we have owned the boat, at a cost of well over $1,000. It's been sort of a boiled toad process, as it was less trouble and slightly less cost each failure to repair it rather than replace it.


That said, I still have vacuum leak issues. You throw money and time at them, they get a little better and then come back. Currently, my head cycles every 15 minutes, so I don't leave it on all the time. I turn it on when I need it and off when I'm done. I spent two full days and about $400 in parts a couple of months ago to get it to that level, it was cycling every 45 seconds.



There's a Raritan Sea Era in my near future.
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Old 10-28-2020, 04:47 PM   #13
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Yes, our 2005 400 came from the factory with a Vacuflush system, which it still has, regrettably. The hoses are 1.5". At this point the only original parts left are the toilet itself (just the porcelain part, none of the guts) and the hose. Everything else has been replaced in the seven years we have owned the boat, at a cost of well over $1,000. It's been sort of a boiled toad process, as it was less trouble and slightly less cost each failure to repair it rather than replace it.


That said, I still have vacuum leak issues. You throw money and time at them, they get a little better and then come back. Currently, my head cycles every 15 minutes, so I don't leave it on all the time. I turn it on when I need it and off when I'm done. I spent two full days and about $400 in parts a couple of months ago to get it to that level, it was cycling every 45 seconds.



There's a Raritan Sea Era in my near future.
Maybe that is why so many stay with VF over time, they get locked in. Maybe if they go to a ME at the first failure there would be less VF issues.
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Old 10-28-2020, 06:15 PM   #14
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We've had two complete Vacuflush systems on Blue Sky for 7 years with almost no issues. The occasional clog is easy to fix, and they are reasonably quiet. I don't know how quiet the Elegance is, but I know ours are very tolerable.
A happy customer.
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Old 10-28-2020, 06:26 PM   #15
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The ME is very quiet.
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Old 10-28-2020, 06:29 PM   #16
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We've had two complete Vacuflush systems on Blue Sky for 7 years with almost no issues. The occasional clog is easy to fix, and they are reasonably quiet. I don't know how quiet the Elegance is, but I know ours are very tolerable.
A happy customer.


Had our for 30 years, only one problem when someone flushed something the didn't eat first.......a little simple maitence every three or four years......happy camper.
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Old 10-28-2020, 07:30 PM   #17
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I’m a live aboard and I have had vacuflush toilets for 30 years. I have had very few issues with them and far fewer issues than any other toilet that has been around for 30 years. Most issues are caused by poor operation practices. Count to five while flushing and your system will live a long time. I have seen some very poor installations with twists, turns and up hill runs, of course those systems had troubles. A vacuum leak is due to poor plumbing, just think what that leak would look like on the pressure end of a macerater toilet. Sure there are lots of complaints about vacflush toilets because there are huge numbers of old systems out there, many operated incorrectly and others installed poorly, not vacuflush’ s fault. Now if you are limited to 1” on the vacuum side then it’s the wrong system. Between the vacuum generator and the holding tank it’s much less of an issue but not ideal. My vacuum generators are all located next to my holding tank in the engine room. This means I have very quiet toilets and my hoses never get permeated with stink.
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Old 10-28-2020, 09:48 PM   #18
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Here we go again! So many Vacu-flush haters.

Ignore the haters. The VF is a great toilet.

Most problems with VF are due to poor installation, user error, lack of maintenance and lack of knowledge or repair skill.

For most informed and capable VF owners, the VF is the cats meow.

I've seen 15 to 20 year old VF operating fine with 0 maintenance.

I expect to be attacked by the VF hate gang.

Thanks to the VF owners who express satisfaction with VF.

Full disclosure, I am a VF dealer.
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Old 10-28-2020, 11:01 PM   #19
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Here we go again! So many Vacu-flush haters.

Ignore the haters. The VF is a great toilet.

Most problems with VF are due to poor installation, user error, lack of maintenance and lack of knowledge or repair skill.

For most informed and capable VF owners, the VF is the cats meow.

I've seen 15 to 20 year old VF operating fine with 0 maintenance.

I expect to be attacked by the VF hate gang.

Thanks to the VF owners who express satisfaction with VF.

Full disclosure, I am a VF dealer.

Ok, here you go again. Apparently you feel you must defend the products you sell. Thatís ok. However, I am not part of any hate gang. I am pretty upset that you feel the need to call names and include me in the name calling. We have gone down this road before, but I have never called you or anyone names. You feel free to express your opinion of the VF systems, but you have to get personal doing it. Others have stood up for the VF system but they didnít get personal doing it, why do you? I also should be free to express my opinion without being attacked. The OP essentially asked what people thought of the VF system. So I guess only good opinions are allowed. When I like a product I give it good to excellent reviews, when I donít like a product I give it poor to bad reviews. I think that is what most people do on this forum. But it seems that you cannot tolerate any negative opinions on the product you sell. If we only give good opinions then the forum will become useless. But please leave the personal attacks and name calling on some other forum.
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Old 10-29-2020, 11:24 AM   #20
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I was responding to a comment by another member that was derisive. You did not make a negative comment on this thread.

The negative comment was posted before OP asked "What pleasures await me with a vacuflush head? Please do tell all." in post 9.

His original question was about hose size.
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