gzip
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Post by gzip on Jul 14, 2020 7:59:56 GMT -8
I have a direct sewer hookup so I decided to replace the recirculating Monomatic with a real toilet. I had to hacksaw one of the bolts to remove it because it was impossible to reach. Anyhow, here is the rusted and immobile old toilet flange. three of the four wood screws that hold it to the floor came out easily - I managed to strip the fourth. Once that is out I don't know if this screws into the outlet pipe or if it is glued or what. Question: should I try to chisel and cut it out and replace it, or resurface it and use it? I don't want to break anything else. 
64-flange by Gretchen Zimmermann, on Flickr
OK - here it is after I hit it with a wire brush. It looks pretty solid. If I get it nice and smooth and maybe oil it or treat it with some kind of rust deterrent can I use it without I getting leaks?  64-flange-2 by Gretchen Zimmermann, on Flickr |
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Post by vikx on Jul 14, 2020 10:51:12 GMT -8
Monomatics (good riddance!) had a built in storage (black) tank. This flange outlet is a pipe that leads to a valve; no black tank.
If by real toilet, you mean a house type toilet? That would work and there's a built in trap in house toilets. If you are talking RV toilet, that type won't work.(no black tank and flushing ability is limited)
You did a good job cleaning the flange. House toilets are mounted on a wax ring which seals the union. Measure the existing flange carefully to be sure a modern toilet will fit. I'm guessing it will.
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gzip
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Post by gzip on Jul 14, 2020 11:10:57 GMT -8
Thanks! So you think I'll be able to use that flange once I clean it up a bit more? that's good news!
If I'm connected directly to the sewer why would I need a black water tank to use an RV toilet? I picked up a Thetford that will fit, though I can probably return it. It it a matter of low water pressure to flush stuff out the sewer line? A 10" rough-in house-style toilet might be made to work, though you'd probably have to sit with your feet out the door or sideways with your feet in the shower to use it. I could use a portable external black water tank if I took it camping.
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Post by vikx on Jul 14, 2020 20:51:26 GMT -8
Double check the flange size and be sure you can get toilet bolts to fit it.
An RV toilet does not have a trap to prevent sewer gasses from entering the trailer. It also does not have enough flushing ability to clean the pipes. (more of a trickle than a wash) Thus the black tank. With chemicals and some liquid, the tank breaks down waste and is flushed every so many days. The weight of the contents pushes everything down and out. Without the tank, the toilet will "dump" everything in one place causing a blockage.
If you want to use an RV toilet, you will need a black tank.
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