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Old 09-07-2013, 09:20 AM   #15
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Originally Posted by Sardis22 View Post
How come all the plumbing fixtures in a rv have traps just like a house except the toilet.
RV toilets do have traps; and it is important to make sure they are filled if you don't want your rig smelling bad. The trap is located in the channel running from the overflow hole in the toilet bowl to the black tank. The trap is filled by running water into the overflow hole.

Stan Birch
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Old 09-07-2013, 09:25 AM   #16
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If you have a 50 gal black tank and a standard 1GPF toilet, you can flush 50 times, right?

Dave and Nola, RVM1
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Old 09-07-2013, 09:48 AM   #17
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Originally Posted by Sardis22 View Post
This my be a dum question but had to ask. How come all the plumbing fixtures in a rv have traps just like a house except the toilet. I would like to install a real toilet like in my house. Has anyone ever seen this. It would be great no smell.
I don't know what brand or model toilet you currently have, but Thetford makes several china RV toilets. I believe this is the one we have in our 2013 Adventurer.

Aqua Magic Residence

The big difference between RV toilets and residential ones are the amount of water needed to flush, the lack of a P trap in the RV style, and the fact that the residential style needs water standing in the bowl to provide a seal to the black water tank.

Beyond that the residential styles use a minimum of 1 gallon of water per flush. It wouldn't take long to empty a fresh water tank and fill the black water tank. There is no safety feature that would stop water from comming into the black water tank even though it's full. Given that most fresh water tanks are sized to be slightly smaller than the total volume of the grey and black water tanks, there's a good possibility you could have an overflow.

As mentioned earlier a gallon or more of water sloshing around in the toilet while traveling could create quite a mess. Then there's always the possibility that air rushing over the vent stack could create a venturi effect and pull the water in the bowl into the black water tank. If that happens you're in for a real treat when you open the bathroom door.

If you just want the look and feel of a residential toilet check out the Thetfords at your local RV dealer or Camping world. I don't think you'll be able to test them in the store so you'll have to go with whatever looks best.
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Old 09-07-2013, 10:26 AM   #18
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Microphor toilet

Is it worthwhile replacing a Microphor LF 220 toilet with say a Dometic 320 unit, and if I was to make the change, is there some kind of conversion plate used to go from the current 4 bolt system to the Dometic 2 bolt toilet? thanks for your help..
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Old 09-07-2013, 12:41 PM   #19
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Whoa, that Microphor is about $ 1200 retail!

Our LF 220 has served us well for 11 years even though we have had to rejig the components occasionally.

It is essentially a residential toilet and used in the Marine, Bus, and train world.
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Old 09-08-2013, 08:32 AM   #20
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Go "GREEN" and install a compost toilet (nature's head). Then you can GO (pun intended) up to 3 months for two people. You can take twice as long showering as both the grey and black tanks can be used for "GREY" water. deSanford
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Old 03-02-2014, 09:15 AM   #21
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Headhunter toilet

Our coach has a Headhunter Royal Flush toilet and has no problem. Visit link for info:
Headhunter, Inc - Toilets
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Old 03-02-2014, 09:37 AM   #22
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My personal opinion of Thetford Electric Toilets has been posted in some previous threads. Just search for Thetford Aria II Toilet.

My personal preference and recommendation are the Sealand Electric Toilets. I removed the POS Aria II and installed a Sealand Magnum Opus back in 2010. In those 4 years there hasn't been even a hint of a problem. It's the closest you will come to a "normal" china toilet used in a house and it is quiet when flushing.

I don't think the Magnum Opus is still available but the next model down is called the Concerto. The only difference is the Magnum Opus has the ability to select three different water levels of use. The Concerto comes in two different models depending on if the toilet is sitting directly over the Black Tank or it has to travel some 20 feet to get to the Black Tank. That one uses a Vacuum Type Flush to charge the system when flushed.

See attached PDF file.

Dr4Film ----- Richard
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File Type: pdf Concerto.pdf (517.1 KB, 26 views)

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