Capillary Type Joints

There are quite a few different plumbing joints that can be utilised for different tasks. Below are two types of a joint called a capillary type. This joint usually requires soldering to be done in order to make the joint secure. The term capillary action is when a liquid flows in a narrow space without the affects of gravity influencing it, which is how the joint is formed, basically, melted solder runs into the joint and then cools, making a tight waterproof joint. There are a couple to talk about and below is a short description of them. Stratford Plumbers can solder joints.


If you look on the shelves of your local merchant, you will see two types of this joint, firstly the ‘End-feed’ joint. Then there is the ‘Yorkshire’ or (integral-ring joint), Yorkshire joints are slightly more expensive than end-feed joints. But you should have no issues with them.


End-feed.

These joints must have solder applied to them when hot to make the joint. You’ll know when the temperature is correct as the solder melts and flows like water on the joint. Keep dabbing the solder into the joint until you see it start to form at the bottom of the joint, however, do not use too much or it will start dripping. Allow the joint to cool fully before you move it.


Yorkshire.

These are called self-soldering joints, because they incorporate a ring of solder inside the end of the fitting. Clean the end of the pipe on the inside the joint with wire wool. Smear a little flux paste into the joint and on the end of the pipework. Put the joint together, making sure that the pipe is set securely. Make a pencil mark so that you will know if it moves. Heat, both joint and pipe with a blowtorch until you see a fine ring of solder in silver where the pipe makes the joint. You can use more solder if you think it is required. A Stratford Plumber uses this type of joint.