Odd sized water pipe in the bathroom shower. How to fix it?

2018-08-12 3:23 pm
To ask the question I have to start by saying what I did.

In my basement there is a bathroom shower, which was DIYed by the previous owner, I supposed. Today I tried to replace the fitting because it is facing upward costing a crooked shower pipe. I wanted to replace the fitting with a downward facing one (image on the left). So I cut the soldered fitting and only until then I realized the pipe does not fit in the Sharkbite I bought. The 1/2 diameter sharkbite is a bit too small for the fitting. The fitting is so long that it totally covers up the inner 1/2 copper pipe. When I cross cut the fitting, the 1/2 copper pipe remains inside the fitting pipe. (image on the right) I asked Home Hardare and was told that I need to use a propane torch to heat up the fitting and then get the inside copper pipe out. I tried but with no success.

I am wondering if there is another easy way to fix this. The fitting pipe is slightly bigger than 1/2 inch in diameter. Thank you!

回答 (3)

2018-08-13 7:58 pm
✔ 最佳答案
this is in a basement -- what's behind the wall? you can't get the old pipe out via torch without getting to the actual connection behind the tile i see in the photo. If you can get to it from the back side of the wall -- do that. even if it means cutting out the wallboard installed there to access the fitting.

otherwise, you're going to have to remove some of the tiles or cut through the plastic to get torch access.

If you're uncomfortable using a torch, by all means find a handyman with experience in plumbing work. You do not want to burn the house down.

{PS: I used Mapp gas rather than propane until it was discontinued in 2008. The "substitute" MAP-Pro product isn't significantly different from propane. In difficult circumstance, a real plumber uses oxy/acetylene because it is much hotter and therefore heats the joint better -- which was the advantage of the old Mapp gas.} ["soldering" a vertical pipe join with propane is fairly tricky -- you have to heat the pipe enough that the liquid solder will be "drawn up" into the join all the way around. One imperfection and you get a leak. You also have to make sure your piping is fully dry when using propane -- bit tricky in the basement where gravity may be supplying replacement water ... the torch evaps the water, but gravity replaces it ... can only counsel patience and using a lot of heat ... which, of course, is dangerous to the wood studs -- fire danger.]
參考: grampa
2018-08-16 12:04 am
If you can't use heat to remove it, then you need to go all the back to straight copper and start from there. Things like this are quite common actually, it is better to go back and rebuild using today's standards then having to go back down the road, and go through this crap again.
2018-08-13 11:23 pm
i wonder if that weird size is a length of repair pipe. Check its diameter against a copper straight coupling - I bet it's the exact same size, in and out.

I know it's a PITA but I recommend you open the wall and solder in some properly sized pipe. You'll have easier access, be able to get all the way around the pipe and can do a much neater, surer job. Yes, you'll have to repair the wall when you're done. Them's the breaks.


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