How to Repair a Plumbing Capillary Joint

Poor initial soldering is usually the reason why a capillary fitting leaks. You can try and rectify this by ‘sweating’ in some more solder but if this doesn’t work you’ll have to remake the joint.

Play the flame of the blow-torch over the fitting and pipe until the solder begins to run from the joint. At this stage you can pull the pipe ends out of the sockets with gloved hands. You can now reuse the fitting as an end feed joint or replace it with a new integral ring capillary connection.

If you reuse the fitting clean the interior surface and the pipe ends with abrasive paper or steel wool and smear them with flux. Then follow the procedure for making an end feed capillary joint.

capillary joint repair How to Repair a Plumbing Capillary Joint

Instructions: Repairing a capillary joint

1. Drain pipe and wrap a damp cloth round nearby joints. Play flame on fitting and pull pipe from rim using gloved hands.

2. If you remake both sides of joint use a new fitting. A spent integral ring fitting, thoroughly cleaned, can be used as an end feed joint.

3. Use steel wool to clean end of pipe and inside of fitting. Brush with flux and push pipe into socket. Apply blow-torch to melt solder.


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