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MPI Monitor 422 Does it have a filter? If yes, where is it located?

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The Monitor 422 has a strainer in the fuel sump. Before you try to take it out, shut off the fuel at the oil barrel and have some old rags to catch some kerosene that will come out. I use a piece of plastic to direct it into a small bowl. If you stand in front of the heater, look on the right side at the bottom. You will see a small plate with 2 screws holding it to the fuel sump. Remove those 2 screws and the plate. The strainer will be in there. You can clean it with some fresh kerosene or I use a can of carbeurator cleaner. You should also have a filter in the fuel line outside close to the oil barrel. If you don't you should get one installed. It blocks any water in the barrel from getting to the heater which will cause your igniter to burn out.

Posted on Nov 11, 2010

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1 Answer

Is the monitor 422 heater considered a direct vent wall heater


Yes, the Monitor 422 heater is direct vent type.

You must install the supplied double-walled vent tube between the heater and outdoors. Failure to properly install the vent tube will quickly deplete oxygen from the space it is operating in. That is a potentially deadly situation.

The pipe is special. The inner pipe is for hot exhaust gasses to be sent outside and the outer walled pipe is for fresh combustion air to be brought into the heater. This set up is why the heater does not create drafts in the home.

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You may have this posted in the wrong product category. Please select another category appropriate to the problem and re-post the problem so the correct expert will see and respond to the question..
This is for car and truck problems related to factory installed systems not add on aftermarket systems.
This post can't be removed or moved, please re-post the question in the correct product category. Thanks

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1 Answer

Where can i buy parts for my mpi monter 422


You can buy parts from me.

The more information about the part you can give me, such as the name, model #, model yr, serial # of the heater, along with the name, part # (if known) & location of the part, picture or photo of the part, & so forth, the better I shall be able to identify the part accurately & send it to you as efficiently & swiftly as I can.

Please send your inquiry to <TrailerParkOwner@hotmail.com>

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