Glow-worm return pipe assembly water pipework can be split into two categories. The first would be the pipes that enable water to be fed in to the heating unit. This would include the mains water supply and the water pipework on the wall jig. The second category would be the pipes inside the appliance that carry water to, from and between the numerous parts of the unit that require it, such as the pump and diverter valve.

Brand Name	Glow-worm