Water purification, treatment and filtration apparatus; water supply and distribution apparatus; desalination plants; effluent and sewage treatment plants; parts and fittings for all the aforesaid goods

Permeable and semi-permeable membranes made from plastics or other polymeric materials; plastics films or hollow fibres for use as gas/liquid interchange media or for use in liquid/liquid or liquid solid separation in fluid processing; semi-processed foams and substrates of plastics for use in filtration; plastics materials cast onto or impregnated into porous support structures for use in filtration, osmosis, desalination, dialysis and related liquid treatments; cloth or otherwise reinforced films and sheets of plastics for use in manufacture of liquid treatment units