Solders and fluxes

Capillary soldering of domestic copper pipework has been the accepted method of jointing for many years.  Quick, efficient, reliable, the soldered joint can be found in the vast majority of properties in the UK.  Every plumber should know the basics when it comes to selection of fluxes and solders.


Fluxes are used to keep copper surfaces clean prior to soldering and to enable the solder to wet and adhere to the copper surfaces.


Probably the most important thing to know about solders is:

Leaded solders cannot be used on drinking water installations.

We all know that lead can be harmful to health, hence the ban on lead-based solders for potable water systems.  It makes sense to use a lead-free solder for all copper pipework applications and all integral solder ring fittings have a lead-free solder.

See our Installation Tip on Fluxes and Solders for full technical details. 

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2016/17 Copper Matters newsletter, topics include: skills competitions; hygienic copper used on an award winning bus; the copper roof on the new Design Museum; updated technical information on the website.