Hot answers tagged

24 votes
Accepted

Can I still use this old (15yrs) flux and solder?

Yes, generally not a problem, most of my solder and flux is old enough to vote and/or drink and it's still fine. The flux, maybe if it's less stable than most, the solder definitely not a problem I ...
user avatar
  • 139k
6 votes
Accepted

What happens if you sweat pipe copper pipe without flux?

There are several possibilities to consider. If you had really cleaned the joint beforehand with emery cloth or steel wool (both parts of the mated joint) there there is a good chance of a decent ...
user avatar
  • 61.9k
4 votes

Can I still use this old (15yrs) flux and solder?

Of these two substances, solder (tin alloyed with small amounts of other metals like copper or lead if the solder is not lead-free) is chemically unable to "age". Well, this is not ...
user avatar
  • 2,292
4 votes

Can I solder galvanized steel to stainless steel?

YES You can weld or braze galvanized but first the zinc needs to be removed or it won't stick well with either method and welding on galvanized metals releases nasty vapors that if breathed affect the ...
user avatar
  • 100k
3 votes

Can I solder galvanized steel to stainless steel?

Yes @rbhat, you absolutely can. I worked as a welder for years and worked maintenance at power plants and worked plant outages all over Texas and even at a refinery in Beaumont Texas and it is ...
user avatar
3 votes
Accepted

How to remove a cast iron pipe plug that has been soldered with lead

The pipes were sealed with lead. Prior to pouring the lead a packing material ("oakum" not sure on spelling) was packed into the joint. This material can be cut out with a screwdriver, trying to heat ...
user avatar
  • 100k
2 votes

Soldering or brazing copper pipes

CPU heat pipes are filled with low-boiling chemicals, such as water or alcohol. At 180°, likely above the critical temperature of the coolant, there would only be supercritical fluid in the tubes, and ...
user avatar
2 votes
Accepted

Water shut off to solder on an adapter?

The ball valve can, I assume, shut off the flow where you need to attach the adapter. In that case just close the valve, attach your adapter, and proceed.
user avatar
  • 20.6k
1 vote
Accepted

Soldering or brazing copper pipes

For strength and durability Brazing ,hands down, is the better choice. Copper brazing rods have a hire melting point than the tin solder used for plumbing. I believe the copper rods need something ...
user avatar
  • 10.8k
1 vote

High Temperature Lead-Free Solder

There is some serious fake information on the "Net" regarding "silver solder". ; starting with Oatey ( Home Depot) who flat out lies about what they call "silver solder". The Halstead net site is good....
user avatar
  • 7,801
1 vote

Using salt to reseal a solder joint?

What she probably meant was that, over time, a small leak might seal itself due to build-up of "salts" at the leak site. Minerals will precipitate out of the water as it evaporates and build up, salt ...
user avatar
  • 33.6k

Only top scored, non community-wiki answers of a minimum length are eligible