Crud in L.P. line to furnace

[GRA]

Some years back the lp tank at our lake cabin had to be moved a little ways and the line was diconnected and then reconnected. Don't know if there got a little bit of crud in the line at that time or if corrosion in the line is the problem but after that we started having prolems with the pilot light on the furnace getting plugged and would have to take it out every year and clean a little piece of crud out that was plugging orifice.

Quit using the furnace and got by with a kerosene heater for the small amount of time we used the place when we needed heat.

I now have a slightly used , newer furnace I'm planning on putting in. Question is, will blowing out the lp. line with an air compressor blow any small particles out? Is there any thing like a filter for lp lines? Or should the whole line be replaced? Thanks Gary

[Tom7227]

In short order someone is going to ask you what the line is made of, the diameter, age and length. Put up the info and get to your answer more quickly.

[GRA]

Its a copper line, 1/2" I believe,and 30+ years old.

[jeffreyd]

how long is it? is it feasible to run a new line? kind of like buying a new car but putting used tires on it. Plus the new furnace might not require that size line etc. good luck

[Archerysniper]

If they had too extend the line after it was moved they probably installed a coupling and then brazed it when you braze copper you get like a black flakey material that will form inside the pipe that could be what you are getting. I would dissconnect and valve the line off at the furnace and pressurize the line to 100 psi then quickly let the air out from the furnace end that should blow out any debrise in the line it is easyiest if you use a valve at the furnace end make sure it is not connected to any appliance or regulators it will cause damage also wear saftey glasses because the stuff coming out will be like a shotgun blast.

[furnace man]

if you look at cooper over a period of time it starts to flake on the inside. Make sure that you have a drip lag at your furnace that will help the proplem. It also might come from black pipe fittings or galvinized fittings start to flake over time. So there is no way around it well you can replace the line there might be a propane filter that you can put on right by your furnace that will help alot. Just my 2 cents worth.

[Surface Tension]

"Make sure that you have a drip lag at your furnace that will help the proplem."

Ditto.

When you said cabin in the back of my mind something told me you don't have a drip leg.

[GRA]

Thanks for the info.--thats something I'll have to check on.

[acman2u]

this is what you need to see before your furnace, it is designed to have most contaminants drop into the leg and gas divert to the furnace. Video is water heater but is exactly the same thing. You will need a flare adapter on the top of the assembly to adapt to your copper line.

Good luck

http://www.wonderhowto.com/how-to/video/...-heater-115475/