12.5mm Inside Diameter and 16mm Outer Diameter.
This pipe is co-extruded, meaning it has 2 layers.
These help prevent the water heating up and light from causing algae.
This co-extruded pipe is also meter marked for ease of cutting.
16mm-9mm or 16-6mm fittings are used to reduce the pipe to connect to the AQUAvalves
The pipe was designed by Autopot for their larger systems but will fit any 16mm pipe fittings
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