The very thin catheter like sanitiser tube has to be threaded down inside the inlet sanitation hose to within 15 cms (6 inches) of the seacock. SeaSmarts come with a 1.8 metre (6ft) length which you cut to length with scissors.
If your inlet sanitation hose is longer than 1.8 metres (6 feet), you will need an extension tube which you can buy in our online shop – just click the Orange Button. It has a connector which simply pushes onto the existing tube. It is essential that the disinfectant tube reaches down to within 15cms (6 inches) of the seacock or you may still get odours.