This fitting joints copper tube manufactured to BS EN 1057 using solder.
It is suitable for above ground hot and cold domestic or potable water services, central heating systems, low-pressure steam heating and pressurised unvented heating systems. It is equally suitable for sanitation services and compressed air lines, gas distribution systems for natural and manufactured gases.

A solder joint is created through the principal of capillary action, when the fitting and tube is assembled and heated to the appropriate temperature, solder becomes molten and is drawn into the gap between tube and fitting for a durably reliable joint. It is recommended soldering flux is also used to aid in this.

22mm end feed coupler joint