Home » Public Forums » GMCnet » Thermasan Question: Chemical Toilet
Thermasan Question: Chemical Toilet [message #315604] |
Fri, 07 April 2017 14:17 |
TR 1
Messages: 348 Registered: August 2015 Location: DFW
Karma: -7
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So having taken some longish trips recently with the GMC, I'm increasingly seeing the benefit of the Thermasan system. Especially with my wife, myself and our 3 kids on board. On the plus side, our coach has a recirculating toilet, which seems to do great on conserving water. But still, 5 people traveling for an extended period can fill a GMC holding tank fairly quick.
So I I've been considering the possibility of trying to piece together a Thermasan system. However, those of you who have chemical toilets know the key to them is using good chemicals. Thetford's Aqua-Kem seems to do best out of the toilet additives I've tried. However, it contains formaldehyde and some other chemicals as well.
So my question is, would it be dangerous to use a Thermasan system on holding tanks containing AquaKem?
From what I've read, under heat, formaldehyde brakes down into mostly CO2/and or CO and Methanol, which does not sound too terrible, considering the CO/CO2 are already present in vehicle exhaust....
Any thoughts, opinions or concerns on using a Thermasan system with holding tank chems?
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
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Re: [GMCnet] Thermasan Question: Chemical Toilet [message #315605 is a reply to message #315604] |
Fri, 07 April 2017 14:54 |
Emery Stora
Messages: 959 Registered: January 2011
Karma: 4
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Mark
I have several Thermasan pumps, motors and other components. I am not sure of their working order as I have been storing them for several years.
Let me know what you need and I’ll see if I have it.
Emery Stora
77 Kingsley
Frederick, CO
> On Apr 7, 2017, at 1:17 PM, Mark Sawyer wrote:
>
> So having taken some longish trips recently with the GMC, I'm increasingly seeing the benefit of the Thermasan system. Especially with my wife,
> myself and our 3 kids on board. On the plus side, our coach has a recirculating toilet, which seems to do great on conserving water. But still, 5
> people traveling for an extended period can fill a GMC holding tank fairly quick.
>
> So I I've been considering the possibility of trying to piece together a Thermasan system. However, those of you who have chemical toilets know the
> key to them is using good chemicals. Thetford's Aqua-Kem seems to do best out of the toilet additives I've tried. However, it contains formaldehyde
> and some other chemicals as well.
>
> So my question is, would it be dangerous to use a Thermasan system on holding tanks containing AquaKem?
>
> From what I've read, under heat, formaldehyde brakes down into mostly CO2/and or CO and Methanol, which does not sound too terrible, considering the
> CO/CO2 are already present in vehicle exhaust....
>
> Any thoughts, opinions or concerns on using a Thermasan system with holding tank chems?
> --
> Mark S. '73 Painted Desert,
> Manny 1 Ton Front End,
> Howell Injection,
> Leigh Harrison 4bag and Rear Brakes,
> Fort Worth, TX
>
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Re: Thermasan Question: Chemical Toilet [message #315607 is a reply to message #315604] |
Fri, 07 April 2017 15:38 |
Tilerpep
Messages: 404 Registered: June 2013 Location: Raleigh, NC
Karma: 7
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I'm intrigued that you have a Thermasan "collection"?! My understanding is limited, and am only aware of four components: pump on waste side, input into exhaust pipe, the dial at the dash, and some kind of speed sensor. Is that a complete list? I would be interested in trying to make a functioning system. If you are willing to part with them, please PM me if Mark doesn't opt in. I may have some parts on the Royale I recently bought... there is a huge knot with electrical tape all over it on the grey tank exit pipe that I have not unwrapped yet. It has 12 volt wires running to it and I am curious just have not gotten to it yet.
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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Re: Thermasan Question: Chemical Toilet [message #315612 is a reply to message #315609] |
Fri, 07 April 2017 18:29 |
midlf
Messages: 2212 Registered: July 2007 Location: SE Wisc. (Palmyra)
Karma: 1
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The speed sensor and vacuum switch can be replaced with a thermocouple temperature controller. According to the Thermasan documents I have the vac and speed were just to make sure the engine exhaust was hot enough to destroy any of the microscopic critters.
As to chemicals. What happens to the metal parts of the exhaust both before the liquid vaporizes and after. I.E will it cause any undesireable corrosion. This would have to be answered by someone with chemical smarts.
Matt Collie is the guru on these things. The Cole-Parmer pump can still be purchased. The wiper motor can be found. The bracket and the brass coupling between the motor and the pump. It took two sets of pump/motor assemblies to make one good one. Pump assembly screws on one were so corroded they had fractured the plastic, but the motor was good. The other had a good pump but the motor was toast. The whole thing is rather simple and could be easily duplicated. If you look up the price of a new pump don't choke. The exhaust injector can be easily fabricated and the control head can be cobbled up. The only thing not available is the level sensor. But that can be worked around.
You see a holding tank gauge near full. You turn on the Thermasan and a few hours later the tank is only half full. You smile.
Half is as far down as the system can pump. I presume the intake is installed at half tank so the pickup screen does not get plugged.
It does work for getting tailgaters to back off. I thought that was just rumor but it's not. It sometimes takes a while for them to figure out what is happening before they back off. In the meantime the driver and co-pilot are laughing their asses off and making bets on how long it will take.
Official note here: Only legal on "74 and earlier vehicles. But your exhaust system will not know or care.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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Re: Thermasan Question: Chemical Toilet [message #315675 is a reply to message #315604] |
Sat, 08 April 2017 19:56 |
RoadWarrior
Messages: 28 Registered: April 2017 Location: Arizona
Karma: 0
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There is a Yahoo group at: https://groups.yahoo.com/neo/groups/Thermasan_owners_forum/info and the manuals are on Billy's site.
I have been collecting parts for one myself. You can find the Peristaltic Pumps on Ebay, and Amazon or coleparmer.com. They did make 12V motors specifically for the pumps (I found one on Ebay) which eliminates the bracket/wiper motor. The pump attaches directly if you can find one. There are also several Service Bulletins on the Thermasan, if you have the Service Bulletins book. Hope this helps.
Just my opinion (not wanting to battle the EPA). The "Aqua-Kem" probably hasn't changed since it was first made and used with the Thermasan. It's primary components are Formaldehyde and Methanol, both of which would incinerate at exhaust temperatures leaving behind CO2 and water with a trace of CO. Both of these chemicals can be found in Gasoline.
[Updated on: Sat, 08 April 2017 20:15] Report message to a moderator
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Re: Thermasan Question: Chemical Toilet [message #315682 is a reply to message #315604] |
Sat, 08 April 2017 20:26 |
TR 1
Messages: 348 Registered: August 2015 Location: DFW
Karma: -7
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Thanks for all the responses, everyone. I'm going to proceed based on the assumption that heating formaldehyde with engine exhaust won't produce sarin gas or anything. Emery, I'm starting from scratch, so any parts you are willing to part with I'd be happy to buy. Same goes for anyone else that have any parts they'd be willing to part with.
If it turns out I am unable to find some or all of the original parts, would anyone have or know where I might find some pics of any of the parts? Particularly, pics of the pickup and injector would be appreciated.
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
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Re: Thermasan Question: Chemical Toilet [message #315711 is a reply to message #315609] |
Sun, 09 April 2017 06:38 |
Chris Tyler
Messages: 458 Registered: September 2013 Location: Odessa FL
Karma: 7
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Matt Colie wrote on Fri, 07 April 2017 15:57
They also are real good for making tailgaters back off......
Matt
I have often thought of a macerator pump and a rear facing nozzle for exactly the same reason.
76 Glenbrook
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Re: Thermasan Question: Chemical Toilet [message #315715 is a reply to message #315711] |
Sun, 09 April 2017 08:53 |
midlf
Messages: 2212 Registered: July 2007 Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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Chris Tyler wrote on Sun, 09 April 2017 06:38Matt Colie wrote on Fri, 07 April 2017 15:57
They also are real good for making tailgaters back off......
Matt
I have often thought of a macerator pump and a rear facing nozzle for exactly the same reason.
I thought of that too. However I have a toad. Just to much fuss to have a sanitary quick disconnect at the hitch and run a hose to the rear of the toad.
There are other things I can think of but I'll just get in trouble.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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Re: [GMCnet] Thermasan Question: Chemical Toilet [message #315785 is a reply to message #315780] |
Mon, 10 April 2017 07:48 |
midlf
Messages: 2212 Registered: July 2007 Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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I would like a dead/defective level indicator module. I want to dissect one to dertmine if it can be duplicated easily. Given that it was low production from the 70's that may possible.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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Re: Thermasan Question: Chemical Toilet [message #315786 is a reply to message #315604] |
Mon, 10 April 2017 08:45 |
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wally
Messages: 643 Registered: August 2004 Location: Omaha Nebraska
Karma: 5
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TR 1 wrote on Fri, 07 April 2017 14:17So having taken some longish trips recently with the GMC, I'm increasingly seeing the benefit of the Thermasan system. Especially with my wife, myself and our 3 kids on board. On the plus side, our coach has a recirculating toilet, which seems to do great on conserving water. But still, 5 people traveling for an extended period can fill a GMC holding tank fairly quick.
So I I've been considering the possibility of trying to piece together a Thermasan system. However, those of you who have chemical toilets know the key to them is using good chemicals. Thetford's Aqua-Kem seems to do best out of the toilet additives I've tried. However, it contains formaldehyde and some other chemicals as well.
So my question is, would it be dangerous to use a Thermasan system on holding tanks containing AquaKem?
From what I've read, under heat, formaldehyde brakes down into mostly CO2/and or CO and Methanol, which does not sound too terrible, considering the CO/CO2 are already present in vehicle exhaust....
Any thoughts, opinions or concerns on using a Thermasan system with holding tank chems?
If any one wants a reasonable facsimile of a thermosan pump I have one I'd send for the price of shipping. It is a Masterflex 7017-21 pump driven by a Nissan wiper motor. We had it on and used it until this year when we installed a bigger black tank.
http://www.gmcmhphotos.com/photos/power-level-valve-fitting/p10563.html
I used the minimum speed switch in the original cruise and a vacuum switch to control it.
Wally Anderson
Omaha NE
75 Glenbrook
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Re: Thermasan Question: Chemical Toilet [message #315838 is a reply to message #315786] |
Tue, 11 April 2017 12:49 |
TR 1
Messages: 348 Registered: August 2015 Location: DFW
Karma: -7
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Senior Member |
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wally wrote on Mon, 10 April 2017 08:45TR 1 wrote on Fri, 07 April 2017 14:17So having taken some longish trips recently with the GMC, I'm increasingly seeing the benefit of the Thermasan system. Especially with my wife, myself and our 3 kids on board. On the plus side, our coach has a recirculating toilet, which seems to do great on conserving water. But still, 5 people traveling for an extended period can fill a GMC holding tank fairly quick.
So I I've been considering the possibility of trying to piece together a Thermasan system. However, those of you who have chemical toilets know the key to them is using good chemicals. Thetford's Aqua-Kem seems to do best out of the toilet additives I've tried. However, it contains formaldehyde and some other chemicals as well.
So my question is, would it be dangerous to use a Thermasan system on holding tanks containing AquaKem?
From what I've read, under heat, formaldehyde brakes down into mostly CO2/and or CO and Methanol, which does not sound too terrible, considering the CO/CO2 are already present in vehicle exhaust....
Any thoughts, opinions or concerns on using a Thermasan system with holding tank chems?
If any one wants a reasonable facsimile of a thermosan pump I have one I'd send for the price of shipping. It is a Masterflex 7017-21 pump driven by a Nissan wiper motor. We had it on and used it until this year when we installed a bigger black tank.
http://www.gmcmhphotos.com/photos/power-level-valve-fitting/p10563.html
I used the minimum speed switch in the original cruise and a vacuum switch to control it.
Wally, I'd be interested in the pump if it is still available... Also, I looked at your blog. Nice work on the new black tank. How much capacity would you estimate you have now?
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
[Updated on: Tue, 11 April 2017 12:49] Report message to a moderator
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Re: Thermasan Question: Chemical Toilet [message #315841 is a reply to message #315838] |
Tue, 11 April 2017 13:32 |
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wally
Messages: 643 Registered: August 2004 Location: Omaha Nebraska
Karma: 5
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TR 1 wrote on Tue, 11 April 2017 12:49wally wrote on Mon, 10 April 2017 08:45TR 1 wrote on Fri, 07 April 2017 14:17So having taken some longish trips recently with the GMC, I'm increasingly seeing the benefit of the Thermasan system. Especially with my wife, myself and our 3 kids on board. On the plus side, our coach has a recirculating toilet, which seems to do great on conserving water. But still, 5 people traveling for an extended period can fill a GMC holding tank fairly quick.
So I I've been considering the possibility of trying to piece together a Thermasan system. However, those of you who have chemical toilets know the key to them is using good chemicals. Thetford's Aqua-Kem seems to do best out of the toilet additives I've tried. However, it contains formaldehyde and some other chemicals as well.
So my question is, would it be dangerous to use a Thermasan system on holding tanks containing AquaKem?
From what I've read, under heat, formaldehyde brakes down into mostly CO2/and or CO and Methanol, which does not sound too terrible, considering the CO/CO2 are already present in vehicle exhaust....
Any thoughts, opinions or concerns on using a Thermasan system with holding tank chems?
If any one wants a reasonable facsimile of a thermosan pump I have one I'd send for the price of shipping. It is a Masterflex 7017-21 pump driven by a Nissan wiper motor. We had it on and used it until this year when we installed a bigger black tank.
http://www.gmcmhphotos.com/photos/power-level-valve-fitting/p10563.html
I used the minimum speed switch in the original cruise and a vacuum switch to control it.
Wally, I'd be interested in the pump if it is still available... Also, I looked at your blog. Nice work on the new black tank. How much capacity would you estimate you have now?
Email me your post address, wallyand at aim . com and I'll send it your way. New tank 37 gallons when it quit venting. Glad to pass the pump along.
Wally Anderson
Omaha NE
75 Glenbrook
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Re: Thermasan Question: Chemical Toilet [message #316500 is a reply to message #316488] |
Sun, 23 April 2017 14:50 |
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Matt Colie
Messages: 8547 Registered: March 2007 Location: S.E. Michigan
Karma: 7
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RoadWarrior wrote on Sun, 23 April 2017 11:58Found this link today, and though an "Expert" opinion would ease your mind.
https://www.americanchemistry.com/Media/PressReleasesTranscripts/ACC-news-releases/Formaldehyde-Is-Biodegradable.html
"Formaldehyde is a ubiquitous, naturally occurring substance produced by every living organism. Studies show that formaldehyde is readily biodegradable and does not accumulate in either the environment or in people. In the environment, formaldehyde is quickly broken down in the air by sunlight or by bacteria in soil or water."
The above is accurate, but the problem is that it does not take a very high concentration of it to make it very toxic to all biological processes. This is what makes it effective as a black tank odor control. By killing the biological activity, the formation of sewer gasses is stopped. The problem with using it in an RV is that if the black tank gets dumped into an anaerobic treatment system that counts on the activity of an bacteria colony, it can easily damage or kill off the colony. Then the system will fail in short order. If you are always going to dump into a municipal system, it is not an issue as they always use aerobic processes.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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