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 Running copper pipe through a block wall
Author: sum (FL)

I have a situation where I am running a 3/4" copper pipe along (horizontally) a 4" thick block wall on the garage side, then I want to make a turn and run it THROUGH the block wall through a hole and out the other side, and as soon as it comes out, I want to make a turn to run vertically down.

Kind of like a zig-zag.

I need the pipes on both side to tightly hug the wall, no extra space.

How would I solder such a configuration? One end of each joint is inside of the block. I can solder one joint then insert it, but I can't reach and solder the inside end of the other joint. I don't want to bust open a large hole just to be able to solder it. Is this where I need to use a female threaded elbow with a male adapter to the pipe?

I can't think of a way to make the soldering solution work.

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 Re: Running copper pipe through a block wall
Author: hj (AZ)

If I interpret it correctly, do not solder the section along the wall until after you have soldered both pieces into the elbow, then pull it back and insert the length into whatever fitting you have and solder that one.

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 Re: Running copper pipe through a block wall
Author: sum (FL)

This is what I mean.



I cannot reach the inside of one of the two elbows. Not without making a much bigger hole on one side. I want the pipes to run along the wall.



Edited 1 times.

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 Re: Running copper pipe through a block wall
Author: LemonPlumber (FL)

Funny?

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 Re: Running copper pipe through a block wall
Author: SMSPlumbing (PA)

Solder one 90 on and cut the length that you need to reach the other. Finish the complete solder on the first 90 and then make a little bit larger hole to solder the second 90. Are you running a sleeve for this? It would not be a clean look, but you could use sharkbite 90s. You just will not be able to release the back side of them if you need to repair that pipe for some reason.

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 Re: Running copper pipe through a block wall
Author: North Carolina Plumber (NC)

Here in NC we would have to use a sleeve to run the pipe thru. I'd use a sleeve thats big enough for a 3/4" copper 90 to slide thru, solder both 90's on the short piece, slip it thru the sleeve , then sweat in the pipes that run along the wall. Fill the void in the sleeve and you're done.

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 Re: Running copper pipe through a block wall
Author: dlh (TX)

make the piece through the wall longer and then add a few fittings to get it back to the wall

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 Re: Running copper pipe through a block wall
Author: asktom (MT)

Go through the wall with a brass nipple and put a C X FIP 90 on each end.

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 Re: Running copper pipe through a block wall
Author: hj (AZ)

No way to do it without making a deeper hole on one side or the other. It doesn't have to be much larger than what you need to feed the solder into the joint.

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 Re: Running copper pipe through a block wall
Author: Nayman's Drain Services (Non-US)

Understandably a problem.
Piping of any sort has to be sleeved here. Have you thought of a piece of 1 1/2 ABS in the wall?
Solder your piping, slide thru & finish soldering on other side of wall. Insert Insulating foam after, and cut to clean up after it dries.
S/B will also work, but like was said, impossible to get off afterwards.
Good luck with this one.

How about posting some more pix?
We're curious as to how you're making out.

---------------

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 Re: Running copper pipe through a block wall
Author: sum (FL)

I end up making one hole much bigger than I wanted to and did it that way.

By the way, On one of the elbows, I applied flux to the female fitting end but forgot to apply flux to the male pipe. I didn't realized it until it was all done. Only one end of one pipe, but the whole contraption is already done, that it would be A LOT OF effort to take it apart just to redo it to make sure. It seem to take the solder OK...how big of a risk is it for me to leave it like this? I can't test it yet until I am all done with the entire room.

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 Re: Running copper pipe through a block wall
Author: LemonPlumber (FL)

I will not make much difference .It either was clean and took or it would not have taken the 3/4"of solder as applied when heated.

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 Re: Running copper pipe through a block wall
Author: sum (FL)

What size furring strips do you attach to the block wall if you are running 3/4" pipes across the wall?

The fittings for 3/4" is even bigger than 3/4" and since block walls have some uneven-ness, I need to use 1" or 1.5" thick furring strips for mounting of the cement board or sheet rock?

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 Re: Running copper pipe through a block wall
Author: hj (AZ)

That would be some humungous sleeve to allow a 3/4" elbow to slide through it. It would take even a larger opening than he would need to solder the 90's in the wall.

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 Re: Running copper pipe through a block wall
Author: hj (AZ)

It depends on how well you cleaned the pipe. Some flux should have transferred from the fitting to the tubing, and as long as the copper was well cleaned, it should have made an okay joint.

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 Re: Running copper pipe through a block wall
Author: hj (AZ)

The fittings are 1" thick, so the only "dressed" lumber that works would be 2 x something, depending on how wide you need them.

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 Re: Running copper pipe through a block wall
Author: LemonPlumber (FL)

Sum.you may consider PT deck boards as a use product."the nail plates will hold.This can be ripped to fir width.Remember to isolate the copper from the block and the masonry board.Plastic tape or sleeving.

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