Seeking monoflow draining methods

[Al S]

I am replacing a monoflow tee and its regular tee. Using a 1 inch x 3/4 inch in place of the 1 inch x 1/2 inch. This is to be used for a fin tube baseboard. When I open the drain valve at the return to the boiler and open the vents, there always remain just enough water to make things difficult to sweat. I know about using a plug of bread. I'm looking for any other advise how to rid the circuit of any remaining water.

Thanks in advance folks,

Al

 

[Reach4]

Air compressor or shop vac?

 

[Sponsor]

 

[John Gayewski]

Yeah I use a compressor and blow it out.

 

[John Gayewski]

There is also the tools that are made to plug copper pipe and pull through a fitting after it's been sweat.

 

[Fitter30]

It only takes one drop of water to pull heat away from the joint till it boils off. Low point after draining might have to drill a hole in pipe or fitting to drain.

 

[Al S]

It only takes one drop of water to pull heat away from the joint till it boils off. Low point after draining might have to drill a hole in pipe or fitting to drain.

Drill a hole in pipe and/or fitting that is being removed correct? Certainly you don't mean drilling a hole in a pipe that remains. Please clarify

 

[Al S]

Yeah I use a compressor and blow it out.

Apply the compressed air to the drain spigot at the boiler for that particular zone? If I'm connecting the compressor to the drain valve, where does the water come out from. The conventional way that I am aware of is open the vents on the heaters and let the water drain. If pressurized, the water is spraying out the vents? Please clarify

 

[Al S]

Yeah I use a compressor and blow it out.

Is that for the boiler too. I mean, if I connect the compressor to the drain valve on the branch, where is the water draining from? Is the technique to blow out branches and boiler? I just need to evacuate one single branch.

 

[Al S]

Air compressor or shop vac?

Which one? How did you connect it?

 

[Fitter30]

Drill a hole in pipe and/or fitting that is being removed correct? Certainly you don't mean drilling a hole in a pipe that remains. Please clarify

Drill a 3/16 -1/4" in the bottom suck reminder of water out with shop vac

 

[Al S]

Drill a 3/16 -1/4" in the bottom suck reminder of water out with shop vac

Again, that hole is in a pipe or fitting that continues to be re-used? What do you do with the hole?

 

[John Gayewski]

The only section you need to clear is the part of the piping your working on. Cut the pipe and blow it it with a compressor from the most convenient place you can find. You may need to clear out more piping than you needto work on just to find something to attach to with fittings so that you can hook in the air. There shouldn't be a reason to drain the boiler unless you are below it.

Also if you just wait long enough the water will eventually stop running.

 

[Al S]

The only section you need to clear is the part of the piping your working on. Cut the pipe and blow it it with a compressor from the most convenient place you can find. You may need to clear out more piping than you needto work on just to find something to attach to with fittings so that you can hook in the air. There shouldn't be a reason to drain the boiler unless you are below it.

Also if you just wait long enough the water will eventually stop running.

I learned today the monoflow branch and the indirect tank are fed from the same supply valve. Looks like I have to shut off water supply valve because I can’t isolate the two branches from one sourcing hot water and the other sourced for heat