Dosatron units will accurately dose liquid additives proportionately into water without electricity. The Dosatron D3RE25 is suitable for use with sodium hypochlorite based products as it has a dose rate up to 25% (1:4). Please note this model is supplied with an external injection assembly as standard which must be fitted to the Dosatron unit before installation and use. We also have a range of spares for this unit. Please use the parts diagrams to find your part number and contact us for a price.