TGarrett
TN/SC
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I have been searching for a good while and haven't found a definative answer yet. I asked a while back about toilet bolting and got a good answer so I thought I would quit searching and wracking my brain over this.
My understanding of why you can't install a household toilet is space and possibly because of the gasses in the black tank. Though I am pretty sure there is a vent to the black tank that would keep it from pushing past the loop seal. Maybe that is wrong but thats all I can come up with. Is that the only reason? I was thinking maybe you could install a European style toilet where the Toilet is against the wall and there is a pipe in the wall that runs up to a Tank suspended near the cieling which adds to the pressure but keeps it out of the way as well.
I understand the issues of driving with water in a tank like that, I'm just wondering if it is possible as most of the time the RV is parked and it would be easy to drain the tank.
I am a former submariner and on the old subs they had the RV style valved toilets but now they have regular comercial toilets(no tank high pressure flow) and I know my submarine took bigger turns than my RV so it is just bugging me to find out.
Garrett
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Old-Biscuit
Across the USA
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Joined: 06/20/2009
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Adequate space.........period.
I searched & searched but the only way I can install a residential toilet was move the floor flange. Major redo of subfloor, reposition drain line and I would still have to use a chain pull toilet (tank suspended above in cabinet).
If you have the space (wall to center line of floor flange), no doors/cabinets that will interfere (unable to open without whacking front of toilet) and a space above to suspend tank.......then yeah you can install a residential toilet.
Residential toilets have a built in 'p' trap so gasses will not come back into rig (plus a tank vent going outside). Install shutoff valve and drain tank prior to traveling.
Good luck..I want one 
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Dutch_12078
Great Sacandaga Lake, NY
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Don't forget to include a larger fresh water tank with that residential toilet installation. Even the lowest flow toilets use considerably more water per flush than most RV toilets. And that extra water could require a larger waste tank as well.
Dutch
1995 Coachmen Catalina 322QBXL
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rockhillmanor
On the Road
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Quote:..install a household toilet..
Why? 
"We must be willing to get rid of the life we've planned,
so as to have the life that is waiting for us".
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phnguyk
NJ
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Previous owner, of our previous class C had installed one. It was great, don't know why I haven't changed our current class A over yet.
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TGarrett
TN/SC
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rockhillmanor wrote:Quote:..install a household toilet..
Why?
Why not is the question?
Thanks guys. Right now I am only dumping my tank every 2-3 weeks so I can't see that a little more water would be a big deal since I will usually have full hookups. It was just a thought don't know if I will attempt it or not, I just like to keep options open. As for the space consideration, I think a European style would work since they are based on small spaces over there.
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TGarrett
TN/SC
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and even with dumping 2-3 weeks i don't think i have gotten past 3/4 yet though my tank guage is stuck at 3/4 my flashlight works well. If i did this of course i would install the external monitoring system that can't get gunked up.
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Tom/Barb
Oak Harbor
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TGarrett wrote:Why not is the question?
Because when you go around a corner the black water will all go to one end of the tank, and cause a pressure that can over come the loop seal. then the black water will be in the coach.
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rgatijnet1
Florida
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Residential toilets all include a "trap" built into the porcelain bowl. They do have low flow toilets that only use 1.3 gallons but even that is way above what an RV toilet uses. I am sure that a residential toilet could possibly be used in place of an RV toilet, assuming that it would fit, but I don't really see any advantage. The mounting flange on the RV toilet and residential toilets are the same. They make porcelain RV toilets that have all of the comforts of home and you will not have your pump running afterwards to fill the tank.
* This post was
edited 07/20/12 06:27am by rgatijnet1 *
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sowego
northwestern corner of the Nebraska panhandle
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Joined: 03/14/2006
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We have seen some RVs done with regular flush toilets but only in camp model trailers that are permanently parked.
It is really quite obvious why a regular toilet isn't used:
*They are sometimes larger, requiring more space than availale.
*The water reservoir tank could splash over when moving, therefore cause water damage.
*When most people use an RV toilet--realistically they probably use less than 1/2 gallon per flush even though it is much better to use 1 gallon, about the same as some efficient residential models. The difference could be enough to fill a tank too quickly.
We have no issues with the RV toilet other than the fact many toidy rooms are too small!
* This post was
edited 07/20/12 07:32am by sowego *
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