Best way to drain lines from OWB to the house?

[Greenfield Dave]

I'm losing too much heat from the OWB to the house. I need to replace the pipes someday, but it's not going to happen before this season starts. It's over 100' so to do it right, it's $$$$.

I will use it to heat the garage, as it's very close to the OWB. But for this year, I won't heat the house with it.

So, how do I get most of the water out? I can disconnect the lines at the boiler and in the basement, but there may be a sag in the lines that traps some of the water. I thought about a shopvac either pushing or pulling? Should I pour some anti freeze in as insurance?

It is all water now. no chemicals.

Thanks!

 

[Z33]

If it were me I would use an air compressor.

Disconnect the lines at the boiler and put a quick connect on the end in the house. Use the qucik connect to attach the compressor hose to the house side. Use fully charged compressor to push water out of the lines.

 

[Bob Rohr]

Air, if you have enough volume would do it, just like blowing out lawn sprinklers. If not a few gallons of RV antifreeze would be cheap insurance.

 

[Greenfield Dave]

Thanks guys! I will most likely use both suggestions, just in case.

 

[warno]

X 2 on that air compressor idea. Sounds like the best way on a run that long.