Sectioned pipe, almost completely blocked by hard water scale
Section of pipe, 14.5cm long x 6cm external diameter, almost completely closed by hard water scale
Display illustrating the use of ion exchange in water treatment.
Section of pipe, 14.5cm long x 6cm external diameter, almost completely closed by hard water scale
Section of pipe, 2.5cm long x 5cm outside diameter, showing hard water scale
Section of pipe, 7.5cm long x 5cm outside diameter, longitudinally sectioned to show hard water scale.
Sectioned Portable "Deminrolit" Unit, Mark 11. Water deioniser labelled 'Permutit'. Produced by 'The Permutit Company Limited'