Exploring some toilet options

[andyps]

We have a old Mansfield 808 vacuum toilet we're looking to replace. It was installed in the 80's and it's not working so hot anymore. Unfortunately our bathroom is on the opposite side of the bus from our black tank. Black tank and drain valve are on the usual side and toilet is on the other.

So I've been looking at some macerator toilets. Dometic has a few nice ones. These are pretty pricey though and I worry about it clogging and then having to open it up and dig stuff out (does not sound fun).

I have also considered a standard gravity flush toilet. Not sure how much of an angle a drain pipe on these can handle though. It would likely be a 45 degree angled drop into the existing tank. OR I can relocated the black tank to the other side.

Anyone have any other ideas or suggestions?

[busfan]

This one has a drill press handle, drill bit not included.

https://www.shoptinyhouses.com/products/natures-head-dry-composting-toilet?utm_medium=cpc&utm_source=googlepla&variant=35949656338&gclid=CjwKCAjwhcjVBRBHEiwAoDe5x6k90IMbZY5-7Ps4zXlb33xAS7Sci8Ui8C5u0r9K1oLHL3ELmtqmahoCeaEQAvD_BwE

[eagle19952]

my gravity feed has a 5 foot horizontal run 90 out of toilet flange and a straight in on the black tank side. 3 inch pipe fiberglass tank 70 gallon. still 60 usable. 1 1/2" vent 90'd to the ground.. never had a problem

ok, it over filled once or twice...left a small puddle on water (from the vent) ... on the ground
but it has never backed up or clogged.

works for me, in service 15 years.

[scanzel]

My toilet drops down to a 45 and then about 2' to another 45 into black/gray tank never a problem but the when I bought the 45 angle it had a side 1 1/2" or 2" side connection so I connected my shower drain to it so now when you shower the shower water drains into the toilet pipe and flushes it out into the black/gray.

[Timkar]

You don't say what your budget is. This is what we put in. Has built in macerator.  We used a flexible  1" discharge line to allow us to get over to black tank input.
http://www.boatersland.com/rar220.html

[TomC]

My normal gravity feed toilet is on the right side, tank in the middle, dump on the left side. Never a problem. Nothing more reliable than gravity.
Now my truck has toilet in the mid right side, 3" down, 90 degree to the right, then 90 degree going forward, 90 degree left, then 90 degree down to the 69 gallon black tank.
A few feet of pipe isn't a problem-how do you think your house works with many yards of sewer pipe running from your house to the street? Good Luck, TomC

[andyps]

Excellent, thanks for all the input. I am glad to hear about the flexibility of the gravity, as it would be my preferred choice (for simplicity).

I had definitely considered how the plumbing in a house works, but everything I read online about the RV toilets says it must drop straight down. Glad to get some more reasonable responses.

Thanks again for the feedback.

[Dave5Cs]

You can still get parts to rebuild the old one.
https://www.environmentalmarine.com/categories/vacuflush-toilet-parts/1000-800-series-parts/1008-808-1048-848-parts.html
Dave5Cs

[richard5933]

Big reason that RV toilets drain straight down is that they use almost no water. The flatter the angle or the longer the pipe, the more water is necessary to keep things moving along.

[ol713]

   HI;
     I have used a household toilet for 20plus years.    No problems.   Recently  replaced
     it with another household toilet with 1.5 gal flush.   (2yrs ago)   More comfortable
     when downloading.
                                        Merle.

[Geoff]

Thirty years for me with a house toilet.

[Gary Hatt - Publisher BCM]

How about a European train toilet.  Goes straight thru to the tracks.  No need to deal with any black water tanks. 

[kyle4501]

Another outside of the standard box idea -

-- IF minimizing water use is important -- (with limited tank capacity, reduced usage means less required dumping )

Get a standard RV low profile toilet & mount it on a custom riser that serves as a waste tank. This 'riser' tank is plumbed to the main black tank with a standard slide valve at the 'riser' tank exit. You can use it normally with minimal water until the tank is full, then just dump it into the main black tank.  


Another thought - paper causes problems in slide valves & macerators. If you put the paper in a dedicated waste can & not flush it, you will avoid those issues. Emptying the waste can isn't as messy or time consuming as cleaning/ repairing valves & macerators. And, since the waste can is dry, there is minimal odor. Once we switched to the waste can, I have had zero issues with the waste plumbing in any of our campers.

[eagle19952]

Big reason that RV toilets drain straight down is that they use almost no water. The flatter the angle or the longer the pipe, the more water is necessary to keep things moving along.

another reason rv's have straight drops is because rv black tanks are flat vs. vertical.
and cheap...no pipe involved.

[Lifes2short4nofun]

I just put the Thetford Tecma Silence Plus in and love it.

I hate having to hold the pedal to fill the toilet on an Rv toilet.  Love just pushing a button and then it auto fills.

http://www.thetford.com/part/tecma-silence-plus-rv/