How to solder pipe

Introduction: How to CORRECTLY Solder a Copper Pipe

How to solder pipe

How to solder pipe

How to solder pipe

Hello on this article I’ll be totally explaining how to solder copper pipe to get a pleasant leak-free joint. If you happen to’re unfamiliar with soldering, you’ll find a way to solder any diameter pipe after this video with ease and peace of thoughts.

Step 1:


Alright, so the primary issues I wanna go through are the instruments and supplies you’ll be needing to full the duty. So instrument #1 is a torch. You’ll discover a good torch at your native ironmongery shop that ought to value you between 20$ to 50$ Canadian {dollars}, Sure there are higher fashions on the market for industrial plumbers however if you’re a DIYer doing minor work, these will just do nice.

To find a way to use your new torch you’ll be needing some gasoline. There are 2 forms of fuels for you to select from, you’ve acquired your peculiar “propane” fuel which you’ll both discover within the tenting ile or within the plumbing part of the shop or MAPP fuel. The distinction between each of those is that MAPP fuel burns hotter than propane, which in flip heats up your joint faster, so it’s up to you to select which one you need to use.

You may additionally want a lighter to your torch, In case your torch doesn’t have one built-in, you need to use a devoted striker.

One thing else you may want is a few flux. The first goal of flux is to forestall oxidation of the bottom and filler materials when soldering.

Lastly, you may want some wire brushes, sandpaper, and solder. The plumbing code specifies to NOT use 50/50 solder because it comprises lead, so use 95/5 or any solder that’s lead-free.


Preparation is vital to having leak-free joint. Step one to accomplish that is to clear each elements that’ll be joined collectively. To wash the pipe, take your sand paper and sand the portion that’ll penetrate the becoming till it resembles this. As you can see, there are not any extra floor spottings and that’s precisely what we’re on the lookout for. Subsequent is the becoming. You’ll wanna use a devoted dimension brush to your becoming to get it cleaned, they most frequently arrive clear from the manufacture however it’s essential to get the floor roughed up a bit simply so the solder can adhere higher.


With each your surfaces now prepped, let’s assemble them, however earlier than you’ll want to apply some flux. Making use of the flux is fairly self-explanatory, all that’s wanted is sufficient of it to cowl each surfaces that contact identical to within the image.


Along with your flux now utilized it’s time for the precise soldering course of which is step 2. Now the objective right here is to warmth the portion you need your filler materials to be pulled into. There’s a time period for this and it’s referred to as capillary motion. Capillary motion is the flexibility of a liquid (solder on this case) to movement in slender areas with out the help of exterior forces, which means it’ll movement upwards which is fairly cool.

It’s crucial to begin heating your joint on the backside FIRST, motive being is should you begin heating the highest first, your solder will need to movement down due to gravity however gained’t have wherever to go because the backside of the joint is just too cool to soften the solder, so at all times begin from the underside and work your approach up.

So preserve heating it up whereas testing your solder now and again to see if it will get sucked in. Finally, your joint might be scorching sufficient to settle for your solder so go forward and run a pleasant bead throughout the joint to guarantee full protection. A superb tip right here is to at all times examine your joint after soldering it, it’ll converse for itself which means that should you haven’t appropriately heated the joint, it is best to see some voids within the joint. If this occurs all you might have to do is reapply a little bit of flux, warmth up the joint and solder the affected space.


As the ultimate step, if you’re positive that your joint is soldered appropriately, wait a few minutes for it to calm down. Some plumbers will use some flux to clear off the joint whereas it’s nonetheless very popular however doing it will trigger a giant drop in temperature in a really small period of time and might fracture the joint inflicting a leak. As soon as your solder has solidified, use a rag to wipe off any extra flux that might doubtlessly eat up your pipe in the long term, and also you’re executed.

Make Certain You Have the Proper Tools

  • Pin
  • Share
  • E-mail

How to solder pipe

When doing a plumbing venture involving soldering copper pipe preparation pays for itself. That can assist you prepare here’s a checklist of instruments you’ll want when soldering copper pipe.


How to solder pipe

The torch wanted for soldering copper may be propane or MAPP fuel (methylacetylene-propadiene propane). MAPP fuel is available in a yellow tank and propane is available in a blue tank. MAPP fuel, often a bit dearer, will get a lot hotter than propane, so heats the pipe sooner. Propane works nice, it simply takes longer—which can work to your benefit if you’re new to soldering copper and are engaged on 3/4″ or half” pipe. The selection of a torch is absolutely up to you.


” data-caption=”” data-expand=”300″ data-tracking-container=”true” />

There may be multiple sort of solder out there so ensure to purchase plumbing solder. Examine that the solder is all proper for soldering copper plumbing pipes and that it’s protected for ingesting water.

How to solder pipe

That is an acid that makes the solder movement into pipe joints. With no good flux, the solder is not going to movement proper and it’s extra probably that you’ll find yourself with leaks. You’ll be able to solder with a lot of the fluxes out there at residence enchancment shops, however there are some you would possibly desire greater than others. If you happen to discover one that’s working nicely for you keep it up since not all fluxes are created equal.

As soon as once more make it possible for the flux you buy is protected for ingesting water if that’s what the pipes are for.


How to solder pipe

The striker is used to create a spark to begin the torch with. Some torches have auto strikers in-built so, in that case, a striker could be pointless. For security causes it’s at all times a good suggestion to use a striker, not an open flame, to gentle a torch.

Copper Pipe Cutters

” data-caption=”” data-expand=”300″ data-tracking-container=”true” />

Tommy Halvarsson / WikiMedia Commons

Utilizing copper pipe cutters is a straightforward approach to minimize the mandatory pipe lengths. The cutters go away a pleasant straight edge they usually assist to decrease burrs on the minimize edge.


” data-caption=”” data-expand=”300″ data-tracking-container=”true” />

Ensuring that the pipe and fittings are clear might be one of the vital essential issues to do earlier than you start soldering copper pipe. A superb sandpaper material is critical to clear the surface of the copper pipe. Sand each ends of the pipe to about half an inch past the becoming.

Becoming Brush

” data-caption=”” data-expand=”300″ data-tracking-container=”true” />

To wash the within of the copper fittings use a becoming brush. The wire bristles can prime the within of the becoming to make good contact with the pipe.

Security Gadgets

” data-caption=”” data-expand=”300″ data-tracking-container=”true” />

Workers Sgt. Alexander W. Riedel / U.S. Air Drive

A hearth material, a sprig bottle with water, and a hearth extinguisher are essential to have readily available when soldering copper pipe in order that nothing catches on hearth.

  • Hearth material: a barrier that’s hearth retardant may be positioned behind no matter it’s you might be soldering in order that the encircling space doesn’t catch hearth.
  • Water: A sprig bottle with water is a should. Moist down any space you’ll be soldering first after which use it as a backup if something begins to smolder. Additionally, moist the realm again down when completed soldering because the residual warmth can nonetheless catch hearth.
  • Hearth extinguisher: At all times have a hearth extinguisher useful when soldering copper pipe simply in case one thing catches hearth and you can not put it out with only a spray bottle of water.

There are kits you should buy which have a lot of the fundamental soldering instruments in them, which can typically prevent cash. Take into account that possibility until you’re looking at shopping for particular gadgets resembling a better-than-average torch, extra solder, or a selected flux.

While you discover {that a} soldered copper joint is leaking in the course of the software of full water strain on the road, it’s an indication that the soldered joint wants to be eliminated. Eradicating a solder from a copper pipe would possibly sound like a straightforward process, it’s nonetheless essential to exchange the previous joint with a brand new one to guarantee it retains working correctly. Right here’s a information on how to take away solder from a copper pipe.

1. Flip The Water Off

This doesn’t simply means ensuring all taps will not be in use – you actually have to shut off water from the principle valve. After that, you might have to drain the pipes by turning the taps – each the very best and lowest – on. Be sure that to place a bucket underneath the becoming to make it possible for any extra water is caught when the pipe is eliminated.

2. Guarantee Security At All Occasions

You set your self at sure threat when doing DIY duties. As such, you should have to be sure to have the correct safety so that you don’t undergo extreme accidents. A very powerful gear for eradicating a solder are security glasses. Since you’ll be utilizing a propane torch and a set of instruments, placing on security glasses permits you to preserve your eyes protected whilst you work.

3. Begin Melting The Solder

Be sure that to place heat-resistant material behind the soldered joint to forestall hearth. Then, gentle the propane torch and modify it to the most well liked flame it’s able to producing. Maintain the flame towards the copper becoming till you see the solder start to soften. It is a very essential step the place you actually have to be sure to’re aiming on the becoming and never inside as that melts the pipe.

Hold a water spray bottle close by in case a hearth begins. This fashion, you may put the hearth out as rapidly as potential. Even higher, be sure to have a hearth extinguisher close by or perhaps even a bucket of water in case the flames are somewhat massive.

4. Separate The Pipe From The Solder

Utilizing water-pump pliers, maintain the copper becoming and transfer it earlier than it will get launched from the copper piping. In case it sticks, free it from the solder by twisting 1 / 4 of the pipe. Simply watch out not to squeeze the copper becoming too tightly as a result of that may trigger harm to the copper piping.

5. Get Rid Of The Outdated Solder

With the help of the propane torch, warmth the ends of the copper pipe in order that the previous solder will soften and may be eliminated. Utilizing a dry rag, wipe away any solder that’s left. Take additional precaution to make sure you don’t burn your self when wiping away the previous solder from the pipe.

6. Sand The Copper Pipe

Sand about an inch up the ends of the copper pipe by utilizing emery material. Make it possible for there isn’t any mud or grease left when sanding the pipe. After doing this, the pipe is now prepared for re-soldering. When re-soldering a joint, ensure not to use an previous copper becoming.

Ability Stage

Begin to End


  • propane torch
  • paintbrush
  • emery material


  • copper pipes and fittings
  • flux
  • acid core solder
Like this? Right here’s extra:
  • Pinterest
  • Fb
  • Twitter

Step 1

How to solder pipe

ensure pipe connection space is cleaned

Picture by: Cary Wiedman

Clear the Pipe

Use emery material to clear the surface of the pipe the place the connection might be made.

Use emery material or a small wire brush to clear the within of the becoming to be soldered onto the pipe.

Step 2

How to solder pipe

How to solder pipe

flux used inside fittings

Picture By: Cary Wiedman

safe the becoming to the pipe

Picture By: Cary Wiedman

Safe the Becoming

Use a small paintbrush to apply flux to the within of the becoming (Picture 1).

Safe the becoming to the pipe (Picture 2).

Step 3

How to solder pipe

How to solder pipe

torch used to warmth becoming

Picture By: Cary Wiedman

solder melts proper into joint

Picture By: Cary Wiedman

Warmth the Becoming

Use the torch to warmth the surface of the becoming (Picture 1).
Contact the tip of the solder to the joint of the pipe and its becoming (Picture 2). The solder will soften proper into the joint.

After the solder has cooled, wipe away any extra, ensuring that solder fully encircles the joint, with no gaps.

I am attempting to make a sculpture by soldering copper/brass rods collectively, however after I strive to make one joint, it melts all the encircling joints. I attempted placing on some heatsink tweezers however they weren’t efficient. It is going to be fairly complicated, so clamping the entire thing and soldering all of the joints without delay will not be sensible. Any suggestions for making a greater heatsink? Ought to I simply solder sooner? In the meanwhile I am letting the metallic get actually actually scorching as a result of I guessed it will make a greater joint, however perhaps I am overdoing it?


How to solder pipe

Finest Reply 12 years in the past

If you’re utilizing tin or lead primarily based solder, you do not have to get the metallic actually scorching. The solder is extra of a glue that wants the metallic to be scorching to stick. If you’re utilizing jeweler’s silver solder (technically brazing), then you might have to use totally different temperature ranges of solder, however once more, overheating the metallic would not work. On this case, as a result of the solder boils or breaks down and the joint is not as sturdy.

How to solder pipe

Are you able to wrap a giant ol moist rag on the opposite joint? Works with plumbing generally. You can too get pastes that assist, I do know they use them for gun smithing.

How to solder pipe

Reply 1 yr in the past

I take advantage of a moist towel when soldering copper pipes to preserve the present joints cool. Works like a attraction; so long as you retain it damp it is going to preserve the joint cool in my expertise. What I would like to know is: How shut to an present joint will this technique work? I’ve a leaky shutoff valve that’s about 1” subsequent to an present joint that I really want to preserve (for causes too complicated to go in to now)

How to solder pipe

Anytime you might be sweating pipe,you need to get every little thing cleaned ,fluxed, put collectively,and sweat it abruptly,by no means do say a half of a joint otherwise you wll have issues.When Im putting in one thing like a set of tube and bathe valves I do it as I stated above,and if you get by means of sweating your entire joints,dont contact nothing,should you dont give it time to cool,you can have a leak.

How to solder pipe

Reply 11 years in the past

Additionally when sweating ,preserve the warmth on the joint to the place simply the tip of the flame is touching,testing it each few seconds purchase touching the soldier to the joint,when its prepared you will note the soldier being drawn up into the joint.

How to solder pipe

It would take a mixture of QUICKNESS. and the RIGHT quantity of warmth.
If you’re attempting to solder with a propane torch, you may need to flip the flame WAY down. or swap to a big solder iron. Solder will not be technique to ATTACH issues to one another for bodily energy. Solder will unfastened its connection if the objects have any motion on them (over time). Brazing is perhaps a better option. One other trick to use is to wrap the rods with very THIN wires on the joints you need to solder. The skinny wires is not going to be seen as a result of the solder covers them, however it offers additional energy and can HOLD the joints even when adjoining joints warmth up an excessive amount of.

How to solder pipe

In case your’e utilizing silver solder, like with jewellery, you need to use a paste-mixture of yellow ochre and water to forestall the solder from flowing. Simply combine it up and put it on the solder joints that you do not need to soften. Nevertheless should you’re cleansing the piece with pickle, the identical as you’d with jewellery, you may need to scrub all of the yellow ochre off the piece earlier than placing it within the pickle as a result of yellow ochre is principally iron oxide and the iron will contaminate the pickle inflicting it to copper plate every little thing. In any other case I might counsel submerging elements of it in buckets of water or sand. Or moist sand.

How to solder pipe

What you want is a high-powered soldering torch, and to “braze” as a substitute of merely solder. The torch will warmth in a short time, and you then instantly cool with water. The concept is to are available quick, hit arduous, and go away earlier than the warmth that’s flowing by means of has an opportunity to react. Utilizing a regular soldering iron in such an occasion merely is not going to do. With a torch, you ought to be in a position to make a joint and have it already cooling inside a second, in case you have good approach. By the point the warmth reaches something close by, it is not going to be sufficient to attain a melting level. Don’t remedy solder with water although, because the solder will cool too quick and lose it is bond with the metallic you are trying to bond. Drench the encircling space as a substitute. The method takes follow, however is comparatively simple when you get the cling of it.

How to solder pipe

Associated Articles

  • How to Cap a Dryer Vent
  • Operating PEX in an Attic
  • How to Seal Pipe Holes in a Brick Wall
  • How to Take away Copper Pipes From a Fixture
  • How to Shut Openings Round Pipes Beneath a Kitchen Sink

When reworking a rest room, kitchen or basement, it’s often crucial to transfer or cap off present copper plumbing traces. Copper pipes are soldered collectively utilizing what is named a “sweat” connection. When the pipes are heated, solder is drawn into the joint, making a water-tight seal. The method is comparatively simple with some specialised instruments.

Flip off the water provide valve feeding the pipe to be capped off. If it doesn’t have a shutoff valve, flip off the house’s water-main valve. Activate the entire taps on the bottom degree of the home to assist drain water away from the pipe.

Lower the pipe with a hacksaw. Ensure to minimize as straight as potential.

Clear the surface of the pipe with a bit of emery material. Roughly one to two inches of the top of the pipe needs to be shiny with no metallic burrs. Clear the within of the cap with a plumbing brush.

Apply flux to the surface of the pipe and the within of the cap.

Clear the work space of as a lot flammable materials as potential. This consists of drywall mud, insulation and wooden fibers. Fill a bucket with water have a towel and hearth extinguisher prepared.

Push the cap onto the top of the pipe. Warmth the reference to a propane torch till the flux begins to sizzle. This could take roughly 10 to 15 seconds. Take away the flame from the joint.

Contact the solder to the joint. The solder will soften and get drawn into the joint. It isn’t crucial to transfer the solder round. Feed as a lot solder into the joint as crucial till you see the solder has fully enveloped the joint.

Drape a water-soaked towel over the joint to cool it. Transfer the towel round to keep away from burning a gap in it.

Activate the water shutoff valve and examine the joint for leaks. If the joint leaks, shut off the water, minimize the pipe shut to the cap and repeat the earlier steps to solder on a brand new cap. Don’t strive to re-use the cap.

How to solder pipe

Associated Articles

  • How to Mend Damaged Copper Pipe
  • Eradicating Galvanized Metal and Black Iron Fittings
  • How to Splice Galvanized Pipes
  • How to Substitute a Sizzling Water Spigot on a CPVC Pipe for a Washing Machine
  • Plumbing Fittings That Do Not Require Soldering

As an alloy of copper and zinc, brass is appropriate with copper, and producers produce many frequent plumbing fittings with the fabric. Solder adheres as nicely to brass because it does to copper, so the fittings are often molded with slip joints so you may solder them to the pipes. It is simple to solder copper plumbing should you do it proper however troublesome should you make a mistake, and a typical mistake is to solder pipes whereas water is dribbling by means of them. If the pipes and fittings are dry, nonetheless, you should not have any hassle producing a watertight seal.

Put together the pipe onto which you’re going to solder a brass becoming by first turning the water fully off in order that none is dripping from the top. If the pipe is put in horizontally and water is pooling inside it, swab it out with a rag.

Deburr the top of the pipe with a file should you used a hacksaw to minimize it. Clear off oxidation and filth with 120-grit sandpaper. Correct preparation of the pipe ensures adhesion of the solder.

Unfold soldering flux on the surface of the pipe and the within of the brass becoming with a small brush. The comb often comes with the flux. Slip the becoming onto the pipe and rotate it into the right orientation.

Warmth the joint with a propane torch till the flux begins to boil. When it does, it is going to flip black and start to smoke. Take away the warmth when this occurs.

Unroll a coil of lead-free solder and contact the tip to the joint as quickly as you take away the warmth. Transfer the solder fully across the pipe because it melts and seeps into the joint. Work rapidly. The metallic stays scorching sufficient to soften solder just for just a few seconds.

Solder the opposite joint of the becoming as quickly because the solder within the first joint turns boring and solidifies. Let the becoming cool for 10 to 20 minutes earlier than you contact it.

Are you including a rest room within the basement or want to transfer some water provide traces round? If you happen to do your individual plumbing work and sweat pipes, you’ll have your individual torch however might have some solder. Many DIY’ers need to find out how to do their very own plumbing work and it is a smart way to study. At all times preserve respect for the expert trades however generally there are small jobs that you are able to do your self. Let the professionals do the medium to massive jobs. Prepared to see the very best solder for sweating these copper pipes? Let’s get proper to it!

Costs pulled from the Amazon Product Promoting API on:

What you may count on to learn:

Why is it Referred to as Sweating Pipes?

Copper pipes are nonetheless within the majority of properties at the moment regardless that new residence building is transferring to PEX piping for water supply. So as to be part of pipes collectively it’s crucial to solder the joints collectively in order that they don’t leak water. The water strain inside a typical home needs to be between 40 psi and 80 psi. If there was a leak you’d have plenty of water exiting and making a big mess.

To hitch copper pipes collectively it helps to add a paste referred to as flux to the ends. Flex primarily retains the copper from oxidizing because it heats up. When flux heats up it is going to start to bubble or sweat. The pipes can seem like they’re sweating!

One tip, search for a tinning flux which has powdered solder inside. The alternate sort of flux is water primarily based. If you happen to overheat a water primarily based flux it may possibly generally go away a mark or residue on the pipes and also you’ll by no means get match!

What Kind of Solder is Used for Copper Pipe?

Lead free solder is finest for copper pipes carrying ingesting water. Will probably be freed from parts you don’t need getting into your ingesting water. Nevertheless it is going to require a better melting level than a 50/50 solder.

How Do You Solder Copper Pipes Collectively?

1. Clear the within of every becoming with a wire brush
2. Clear the surface of the pipe with metal wool
3. Apply a small quantity of flux to the pipe
4. Put together 6-Eight inches of solder
5. Warmth the pipe utilizing a torch till the flux sweats or bubbles
6. Apply the solder to the pipe. If the solder doesn’t soften, the pipe wants to be hotter
7. Hold including solder till your entire joint is roofed
8. Clear the pipe with a material

Do You Want Flux to Solder Copper Pipe?

Flux will not be crucial however it’s very troublesome with out it. With out flux, the copper will oxidize because it heats up and can forestall match as you place the fittings on the pipe. The flux will forestall the oxidation course of from beginning and permit the pipe to warmth up so you may soften the solder if you add it to the pipe.

How to solder pipe

How to Solder Copper Pipe

Curated Impartial Critiques

One verified consumer on Amazon has been utilizing Oatey solder for a few years and has not run in to any points. His foremost software has been within the crawl house beneath his residence. He likes this product as a result of it’s non-toxic to your water.

One consumer changed his water heater himself to save on massive plumbing payments. The one extra factor he wanted was a propane torch.

Video from Oatey

Oatey Firm Profile

Oatey is an ISO licensed firm that manufactures plumbing merchandise in america and world wide. LR Oatey began the corporate in 1916 they usually have continued to broaden and enter new markets over time. Headquartered in Ohio, the corporate continues to open distribution facilities and provide chain companies.

In Conclusion

If you happen to’re doing your individual plumbing work from home and want to add a faucet or add a valve, this lead free solder is the very best to your software. Oatey is well-known within the trade and makes top-of-the-line consumables in the marketplace.

  • Meets ASTM Customary B-32 and the necessities of the Protected Ingesting Water Act.
  • Formulated for plumbing/potable water line functions.
  • Copper, bismuth, tin and silver alloy
  • 420°F – 460°F melting vary
  • Lead free solder

Costs pulled from the Amazon Product Promoting API on:

Product costs and availability are correct as of the date/time indicated and are topic to change. Any value and availability info displayed on [relevant Amazon Site(s), as applicable] on the time of buy will apply to the acquisition of this product.