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Old 02-10-2015, 11:05 PM   #1
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Smile Mr. Heater connection

I am trying to decide what is the best way to install a connection in my 5th wheel trailer so I can hook up my Mr. Heater to the house propane to avoid having to rely on the 1 lb. cannisters.

I can tee into the copper propane gas line inside one of the lower cabinets, no problem. My issue is that I want to install a fixed quick-disconnect that is mounted in the lower front wall of the cabinet, so I can plug in the hose for the heater and disconnect easily without having to run the hose through a hole in the cabinet. Are there any plumbers out there or do-it-yourselfers that have done this and would like to share your expertise?

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Old 02-11-2015, 12:03 AM   #2
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This is a very common mod for cold weather PopUp/Folding Trailer owners. They tend to use Mr. Buddy and Olympian Wave Catalytic heaters.

Some of them have it very easy, as the interior stove sometiems is removable and already has a quick disconnect fitting.

When they have to tee into an existing line, some of the most clean installs mount a female quick-connect in a recessed thermostat box, a modified exterior gravity water fill hatch with lock mounted to an interior cabinet, or just carefully hidden in a corner to avoid being seen or damaged.

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Old 02-11-2015, 04:43 AM   #3
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Mr Heater has its own built-in regulator so the heater should be connected to high pressure propane. The propane lines inside the RV are probably all after the regulator and are therefore low pressure lines. Connecting the heater to a low pressure propane line would mean there would be 2 regulators in the system which may result in incorrect pressure for the heater to operate.

Mr Heater sells hoses of various lengths to enable the heater to be connected directly to a portable propane tank. NOTE: a portable propane tank should never be used inside the RV. The tank would have to be placed outside and the hose run through a window, door or other opening.

Mr Heater also makes a tee that you can place between the propane tank in the RV and the RV's regulator. A high pressure extension hose can then be run from the tee to the heater.
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Old 02-11-2015, 08:29 AM   #4
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Good info from "paz". Your problem will be that the propane tanks are probably at or near the front of your 5th wheel. Your best bet may be to tap into the tanks and then run a line inside along the roof of your large storage bay and tap it out near your interior stairwell.
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Old 02-12-2015, 07:30 AM   #5
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Or just use a separate 5# or 10# LP bottle with an adapter hose to the Buddy. We did that for years. The smaller LP bottles can usually be tucked away conveniently, yet last much longer than the 1# miniatures.

5 & 10 lb bottles come in two styles - the low, flat pancake style or the taller but slim style. We liked the slim style because the footprint is small and can be tucked into a corner easily.
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Old 02-13-2015, 12:10 PM   #6
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Mr. Heater Connection (cont.)

Are those 5# and 10# cannisters refillable? If so, they cannot be brought inside, correct?
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Old 02-13-2015, 12:58 PM   #7
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anyone got a link to the items to convert to a big (grill size) tank?
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Old 02-13-2015, 01:17 PM   #8
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"Paz" makes a great point about the "two regulator" issue. For this an other reasons, it nearly impossible to find the hardware required to direct connect appliances like heaters, stoves, camp-fires, etc to you coach propane tank. I looked at the quick disconnect couplers too, but didn't like the potential for a leak. Suspect they are built to allow for safe operations but a propane leak with this kind of coupler is more problematic than either an air [compressor] or a water leak [garden hose].

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