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Old 11-30-2015, 06:01 AM   #1
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Help running Mr. Heater on rigs tank

I'm looking for information about how to install a Mr. Buddy Heater in my class A. I'd like to not run off of one pound bottles but instead off the large (45 gal. guessing) tank underneath the rig. If anyone know of a link or YouTube video on the subject, I'd be most grateful.

Thanks,

Robby
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Old 11-30-2015, 07:01 AM   #2
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You would have to tap into the propane line for your furnace and add a branch with cut off for your propane hose to connect to. I did see a DIY project with pictures in one of the RV forums for the modification. I will update if I come across it. You would need someone who knows that kind of work otherwise. There are accessory hoses available for Mr Buddy, just look online. In the short term, you can use one of those hoses with a 20 lb propane tank.
Here is one: Mr. Heater Big Buddy Hooked To My RVs LP Gas Line
And another: http://roadslesstraveled.us/rv-heater/
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Old 11-30-2015, 07:27 AM   #3
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Speaking from experience, a Mr. Heater has a connection for low pressure aux LP. The key their is "low pressure". I used a line specifically designed for the purpose and a 30 lb tank. The line has a regulator and tank connector connected.

To tap a ASME Motorhome tank, you will need to verify the low pressure side is the correct pressure required by the heater.


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Old 11-30-2015, 07:39 AM   #4
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I have the Big Buddy heater. Installed using a hose from Buddy that has a quick connector at the heater. Drilled a hole in the floor in the main living area which was near the propane tank to bring the hose into the coach. Installed a T connector and shut off valve in the line from the propane tank just after the regulator (low pressure side).

You can install the T connector in a line to the stove top, refrigerator, etc. depending on what is accessible and located where needed.
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Old 11-30-2015, 02:41 PM   #5
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Propane distribute inside the MH is low pressure, on the order of 11" of pressure

I originally tried to feed the MH Low pressure directly to where the 1 lb tank is connected, nope, didn't work.

I modified a Mr Buddy many years ago and bypassed the Mr Buddy bottle regulator by installing a "T" inside the Mr Buddy low pressure line. I then plumbed a valve and propane rubber hose to get LP to it. (you can see this on the link below)

The Mr Buddy can develop minor leaks in the regulator, so I once again modified the Mr Buddy and completely removed the regulator, and plumbed directly to Mr Buddys internal gas valve.

Below is the link to the original modification I did on a Toyota. On my Mirada, I did basically the same thing to tap into the MH's LP system.

I installed a "T" near the water heater to pick up the LP line. I then ran the LP line under the a nearby cabinet and installed a ball valve and a LP hose with LP quick disconnect.

How to - Ventless Heater - Improvement and Do-It-Yourself Projects you have done to Share! - Toyota Motorhome Discussion Board

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Old 12-01-2015, 06:34 AM   #6
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Thanks everyone for the help. This doesn't look all that difficult, although I haven't checked for a location to tap into the low presser line yet.


Thanks again,


Robby
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Old 12-01-2015, 09:30 AM   #7
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I tapped my line into a tee under the stove and then ran the special hose QD to the MBB heater. Oh I also installed a shut off valve at the tee to turn off the gas into the line
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Old 12-03-2015, 06:43 AM   #8
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I purchased the Mr Big Buddy at Menard's yesterday for $109. Decided to see how she works, loaded it all up outside and started it outside to make sure all was well. Brought it inside the house to show the wife and told her that I was going to tap into the low presser line and run off our large LP tank. She was not impressed with the heater at all and was telling me that I need professional help with the RV install. As I was explaining the ease of installing a tee fitting the smoke alarms started going off in the house ...oh boy!


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Old 12-03-2015, 07:04 AM   #9
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Funny! My DW doesn't want me to make any modifications or installations, so I quit asking and just did them. She typically expresses approval afterward for the grab bar on the screen door, the additional 12v outlets and the solar system. She hasn't noticed much of the rest of it, but a propane hose on the floor would be both noticed and unappreciated. "What's wrong with the furnace? It's been good enough." Still, when the furnace didn't work well (we had a recliner chair against the intake) at a chilly Walmart one night, I bought a Mr Buddy for back up and will run off the 1 lb bottles.
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Old 12-03-2015, 08:43 AM   #10
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I believe to safely operate the Mr Buddy, everyone who will be exposed to it must be cognizant of its hazards and the precautions required to operate it safely.

My DW is fully aware of the dangers, i.e. CO, Fire Hazard, etc.

She knows what must be done in order to mitigate these dangers if she chooses to use the Mr Buddy.

With proper knowledge , the Mr Buddy can be operated just as safely as the furnace.
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Old 12-03-2015, 12:09 PM   #11
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Quote:
Originally Posted by Waiter21 View Post
I believe to safely operate the Mr Buddy, everyone who will be exposed to it must be cognizant of its hazards and the precautions required to operate it safely.

My DW is fully aware of the dangers, i.e. CO, Fire Hazard, etc.

She knows what must be done in order to mitigate these dangers if she chooses to use the Mr Buddy.

With proper knowledge , the Mr Buddy can be operated just as safely as the furnace.
CO isn't as much of a danger with Mr Buddy as is oxygen depletion. Make sure to leave a window or vent open slightly. It does have an oxygen depletion shut off feature.
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