Change it for a new one?

 

I guess I should have mentioned that I can't get the pipe to budge. Any suggestions for that, then?

 

The pipe has threads, so I assume a screw on spout that wouldn't come off so someone cut the pipe itself.

 

You can try a plastic cap. The threads are the same and they will "give" a bit.
Grey plastic are often used for well systems.
But if it absolutely doesn't budge, you can thread it to accept a cap.
It will take a bit of muscle though.

 

It would probably help to know what kind of pipe it is. Galvanized or copper? If its galvanized my guess is that you don't have a big enough pipe wrench if you say it won't budge.

 

It looks like galvanized to me, and yes, I don't have a very big pipe wrench. What's the risk of breaking something behind the wall with a bigger wrench?

 

Put some screen door material over it and then spray it with Flex Seal.

Or maybe try filling it full of Great Stuff.

 

This sounds like something a coworker would say which makes me really want to fit the report button!

 

Pretty minimal if the pipe isn't rotten. If you get it out put a new nipple and cap on using tfe paste.

Or find a Fernco cap for temporary use.

QC-0.85 - Fernco QC-0.85 - 1/2" Quik Cap

Fernco QC-0.85 - 1/2" Quik Cap - <b>Note:</b> Size indicates the size of the pipe used with this product <br><br> Qwik Caps offer a quick, easy way to cap pipe ends, test pipes and cleanouts. Made of flexible PVC, they are suitable for above-ground or under-ground use. To install, simply place...

www.supplyhouse.com

 

Spouts that slip over a pipe are available. You don’t want a spout but it will solve your problem.

 

I think your best bet here is to remove the old nipple and replace with a shorter one to cap or just plug where it went. Since you say it's tapered I picture galvanized or brass. Pipe wrench and make sure you're turning the right way!

There are threading tools out there but they can be pretty expensive and difficult to use.

 

You could get a cap and try to pre stretch it by threading it onto a new nipple as far as you can. Do that a few times and maybe you will be able to get it onto the cut threads.

I’m guessing if the threads are cut then someone probably cut off an existing fitting so the threads are probably all too big to thread into a fitting (like you described, so even if the above method worked you probably wouldn’t get it to thread on enough threads to hold under pressure with any level of confidence.

Are you planning to pressurize the pipe later or is it jut to clean up the open end?


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