Irrigation and filtration equipment and devices in this class; liquid injectors; fertiliser injectors; driplines, drippers and dripper lines, constructed wholly from polyethylene; tap nozzles, faucets, cocks and spigots; pipeline cocks and spigots; faucets for pipes; filters which form part of household or industrial or agricultural installations; water filters and filtering apparatus; connectors, adaptors, fittings, parts and accessories for the foregoing in this class; all the foregoing being for agricultural or irrigation purposes