MONOMATIC HEAD

captainmaniac · Post by **captainmaniac** » Wed Mar 09, 2011 4:46 pm

If you are talking about 'usage', for us we usually get odour issues before it's fully full... If you start to fluids sitting in the bowl (or looking down the mouth of the bowl) you know you have max volume. There is also a little indicator on top of the tank (that's the little black disc looking thing infront of the water intake fitting) but I don't know how useful or accurate that is.

If you are talking about priming it: the fill line extends down into the tank a bit. When the right amount of fluid is there to prime it properly the end of that tube is under water... so you can hear it filling up. When the hose goes under water the gurgling sound goes away... then you know it's full. Also I will hit the flush button for a quarter of a second from time to time while filling; when it actually starts flushing the bowl with an adequate water supply, you know you have enough in there.

larglo · Post by **larglo** » Thu Mar 10, 2011 9:58 am

Capt, all,

Thanks Capt. I was thinking about the priming of it.

Have you or anyone, ever removed the Monomatic head? I was wondering about how to do it, I don't see how it is held down or what is holding it to the floor?

The holding tank outlet hose comes out the left side (facing it) then makes a sharp 90 deg turn up along the wall for about 10", then another sharp 90 deg turn left, going through the wall and into the closet, then turns up again to the fixture on the outside of the boat.

I would like to run the hose from the outlet from the head, directly through the wall to the closet, then up to the fixture, thus removing the sharp bend of the second routing of the hose.

The area is to confining to get a drill in between the head and the wall to allow putting in the hole down along the floor.

If I could get the head out, that would give me plenty of room to work and do a better, neater job of it.

I was even thinking about removing the wall separating the bath from the closet, to make the bath bigger, or move as far to the stern as possible and make it removable to allow working room, but not sure what would involve removing the wall.

Anyone having thoughts on that would help.

Thanks,

Larry

hmc · Post by **hmc** » Thu Mar 10, 2011 7:09 pm

The way I see it you have a few choices .

1 live with it as is

2 buy a new head and tank and do it right

3 buy a pota poty
http://www.cabelas.com/product/Camping/ ... t104569380

4 go on the cheap and get this
http://www.cabelas.com/product/Camping/ ... t104569380

alexander38 · Post by **alexander38** » Thu Mar 10, 2011 7:37 pm

Larry, the guys have sent good info on how this system needs to be changed. You really need to stand back and think about this. If you go moving bulkheads and installing tanks and pumps. And end up with a adhoc system that's a P.O.S. and looks bad you can kill the resale $ of your boat. The system needs a thur hull for water supply and a hand pump watercloset to 1 tank. You can waste a lot money fast doing it wrong.

prowlersfish · Post by **prowlersfish** » Thu Mar 10, 2011 7:54 pm

What you have worked fine , so I would keep it as is or throw it away and start over with a new head and tank or a Porta Potti 100 bucks

You will spend more trying to make that head you have work like you want it to then to start over

captainmaniac · Post by **captainmaniac** » Thu Mar 10, 2011 10:00 pm

larglo wrote:Have you or anyone, ever removed the Monomatic head? I was wondering about how to do it, I don't see how it is held down or what is holding it to the floor?

I have had mine out (icky job)... If I remember correctly it is just bolted down to the flooring. There is about a 2-3" high space between the floor and the base of the tank that you can just get your hand into with a wrench. 4 fasteners in total.

Before you try to remove the head itself, you wanna drain it COMPLETELY and try to get the hose off. Easier to try to pull the hose off a securely fastened base then having everything moving.

As others have said though -- think about what you really want to accomplish first, then decide on the best way of getting there. You have a 30 year old head there... drop it after you pull it, or crack something trying to get hoses off, and you may end up replacing it after all...

Muskokan345 · Post by **Muskokan345** » Mon Mar 14, 2011 9:52 am

Captainmaniac, couldn't help but notice that the supply to the recirc toilet is "hard-plumbed" to toilet, now I'm not one of those negative guys, but isn't there a chance that some of the stuff in the head could get siphoned back to your water supply. Improbable, I know, but, after dealing with plumbing and supply drain issues, I'd be a little suspect of the hook-up. Just a thought.

captainmaniac · Post by **captainmaniac** » Mon Mar 14, 2011 12:22 pm

Siphoning is not really possible with this setup. In the pic you can see that there is a shutoff valve in the fresh water line. Valve is only ever opened to prime the head with fresh water (when its empty to start with), then turned off at all other times.

Muskokan345 · Post by **Muskokan345** » Mon Mar 14, 2011 1:02 pm

Ah, good point. Now, if we could just get a melt-down, and get the boats back in the water, huh?

larglo · Post by **larglo** » Mon Mar 14, 2011 2:45 pm

Paul,

The Monomatic is, here by,,,,,,gone! When I was refilling the hold tank, saw a real small trickle of water streaming alone on the floor, so there must be a crack. Not surprising considering it is over 30 years old. I think I started cracking arouind that age too. Right now the head is laying on the stern deck.

So, that is the excuse I needed to refinish the whole thing. I can't afford a regular head, but will buy something like the Thetford 365 MSD Type III Toilet. I hope to expand the floor space getting more room to set and be able to close the door. Of course refinish the walls, etc.

Larry

prowlersfish · Post by **prowlersfish** » Mon Mar 14, 2011 7:06 pm

Sounds like a good plan

captainmaniac · Post by **captainmaniac** » Mon Mar 14, 2011 7:26 pm

Muskokan345 wrote:Ah, good point. Now, if we could just get a melt-down, and get the boats back in the water, huh?

Might not be such a good idea to wish for a melt-down right now ... with 2 or 3 distinct possibilities on the go! How about just saying 'if we could just get things to warm up.....' I'd feel more comfortable!

Muskokan345 · Post by **Muskokan345** » Wed Mar 16, 2011 3:58 pm

10-4, Let's all say a prayer

antlr-king · Post by **antlr-king** » Mon May 30, 2011 9:10 am

imsure it has finally warmed up for guys by now....lol
this is some good info here. im just not sure what kind of head is in this boat i bought. have not had that much time to inspect it yet. will try it today.
will get back and ask questions im sure...lol.