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Questions tagged [soldering]

For questions about soldering both electrical and plumbing joints.

5
votes
3answers
858 views

resoldering copper waste pipe

I've soldered new copper pipe but have never resoldered it. A shiny band of silver solder remains on the end of the copper pipe after an elbow has been removed from it. Does that shiny band have to ...
2
votes
2answers
30 views

Soldering a Tee onto a Copper Pipe That Only Moves About 1cm?

I have a rigid 1" copper pipe that I'm trying to solder a tee onto. It comes off the house and only moves about 1CM up or down. I've already cut it to test how rigid the two pipes were. This isn't ...
2
votes
4answers
56 views

Heat transfer to adjacent solder joints

If I want to remove a soldered joint in a shower valve by heating it and pulling it, would that heat cause damage to the other soldered joints about 2-3" away on the valve?
7
votes
3answers
2k views

Can I solder 12/2 Romex to extend wire 5 ft?

I'm sure this is going to be lambasted by the code gods, but is it SAFE to solder the wires in a Romex cable to extend it? Obviously I would ground the circuit as normal, just trying to avoid another ...
2
votes
2answers
117 views

Can electrical solder be used for joining pipe?

Some background here: I'm an electrical engineer, working on a project that is likely going to require liquid cooling. As part of the installation of this liquid cooling system, a joint needs to be ...
1
vote
2answers
35 views

soldering cast brass finials to 38mm brass handrail tube

I am looking at soldering a cast brass finial to 38 mm brass handrail tube because the fit is too loose for using grubs-crews. Can anyone tell me if a decorators-style propane lamp be hot enough for ...
13
votes
9answers
3k views

Should I solder stranded wires when connecting them to a plug?

I'm about to perform a few electrical changes in my house in order to be able to control lighting fixtures (230V, 30 to 200 mA) from a PC. I have some doubts about the way stranded wires should be ...
2
votes
2answers
96 views

Copper NPT male fitting: accepted practice to sweat to the inside?

My plumber did this and I'm finding it hard to search about, asking for my next project. Here's an example: the 1/2" side of this fitting is 1/2" male NPT, but you can also sweat a 1/2" copper pipe ...
0
votes
3answers
558 views

connect copper without soldering

I need to connect bow copper as on the picture with a copper pipe, and I'd like to avoid soldering. Is there a special tool for this?
1
vote
2answers
145 views

Attach aluminum tube securely to base without welding/soldering?

How can I securely attach 4-ft x 1" aluminum tube to an aluminum base without having to solder/welding or glue? The aluminum base is 1/8" thick. The tubes are open on both sides, but they can be ...
0
votes
1answer
218 views

Aluminum vs galvanized vs stainless tubing for fence with railing?

I'm building a simple fence that's composed of 1" or 1.5" OD x 0.065" wall x 4-ft tube soldered to a stainless steel base that's bolted to concrete. This fence will have a wood rail at the top. ...
3
votes
3answers
175 views

Do water lines that contain lead need to be replaced if it doesn't flow out of a valve that I normally drink out of?

A plumber had came to my house to sweat pipes to install a water valve which controlled water going to the garden spigot. Upstream to the valve is a t-joint. The other output to the t-joint went to ...
2
votes
2answers
704 views

Can I solder galvanized steel to stainless steel?

I have several stainless steel plates and I want to solder galvanized steel tubes to these plates. Is this possible? I ask because I have a guy that does all my soldering work, but he generally ...
15
votes
2answers
2k views

Scientifically speaking, how and why does sweating (soldering) copper pipes work?

A few years ago I remodeled my bathroom and learned how to sweat copper pipes. I've always been able to do it successfully since then, but I've always wondered exactly how and why it works. I've done ...
0
votes
3answers
283 views

Soldering Table Legs?

Would it be ok to solder,brass or hard metal, to make table legs? Or Would the joint not be able to hold much weight?
2
votes
3answers
5k views

Can a low-flow shower head cause a leak behind the wall?

The short question is this: would a low-flow shower head cause some kind of increase in pressure to the water supply pipes that would cause a rupture and leak? The longer story is this: I removed a ...
0
votes
0answers
2k views

Do I have to remove flux residue after soldering?

I noticed those green stuff on a 2 weeks soldered copper joint, as I have read it comes from excess flux. So I would like to know if I have to always wipe off the joint after soldering? And if so then ...
1
vote
2answers
1k views

Soldering soft copper to hard fitting

I'm trying to solder a soft copper coil to a regular fitting and its not working, (I did already a lot of soldering and never had a problem) is there any tips or tricks for soft copper? Do I have to ...
0
votes
1answer
975 views

Soldering or welding stainless steel objects together [closed]

I'm working on a diy project which requires a tiny L bracket attached to a tinbox. I have tried several adhesive techniques such as super glue and metal epoxy but the smooth surface of the tin box ...
2
votes
2answers
4k views

What is the proper way to solder two different gauge stranded wires?

How does one properly solder a 10 AWG copper stranded wire with an 18 AWG copper stranded wire. There are plenty of tutorials on how to solder same gauge wire, but what is the recommended way to ...
2
votes
3answers
986 views

soldering pipe with mapp gas

I am trying to open up some solder joints on a 1/2" residential cold water line, and I am having trouble doing so. I am using a propane torch, and I confirmed that the pipe was evacuated. My brother ...
2
votes
1answer
443 views

How close can soldered and threaded joints be?

I would like to extend this pipe (outdoor sillcock) with copper by soldering a female adapter on the extending pipe and then putting this threaded male into it. Then, I would like to continue on from ...
0
votes
2answers
450 views

Spigot/spicket replacement in tight quarters

I noticed that my spigot was leaking. It was only leaking out of the hole where the water normally comes out. I made the mistake of slightly tightening the packing nut without having another wrench to ...
0
votes
3answers
5k views

Can you deburr copper pipes with a fitting brush?

Probably a stupid question, but I'm trying to learn how to solder copper pipes and am gathering all the tools I might need. I currently have a fitting brush like this one, but wasn't sure if it would ...
3
votes
3answers
5k views

Is it ok to unsolder an outdoor spigot and to solder back a new one without cutting the copper pipe?

I am trying to replace an old outdoor spigot that is soldered to a copper pipe. I will put in place a fitting that will give me a thread so I can attach (screw in) a ball valve. All the instructions ...
3
votes
2answers
2k views

Should I use a wire or soft sponge to clean a solder tip?

I will be buying something to clean my soldering tip. I think my choices are either bronze looking metal wire sponges or yellow soft sponges. Which one is the right tool to clean soldering iron tips?...
0
votes
3answers
8k views

Should I replace my main water valve with a SharkBite shut off valve?

Currently my main water shut off valve is soldered using a 3/4 globe valve. However the stem is leaky and I am thinking of replacing it. Is it a good idea to cut it out and replace it using a ...
0
votes
3answers
17k views

How can I solder/braze thin stainless steel wire?

I've been attempting to practice torch brazing/soldering and am currently attempting to join a ring of stainless steel wire shut like a wrist sized 'o'. Unfortunately the results have been pretty bad....
10
votes
5answers
28k views

Are SharkBite plumbing connectors as reliable as soldered connectors?

Are SharkBite plumbing connectors as reliable as soldered connectors?