what piping required to drain tank ?

I need to replace the lower immersion unit so need to drain the system.

I can run a length of pipe from the drain tap into my bath but am unsure what type to use.

Can anyone recommend a type / size of tubing which will fit and provide a good seal ?

Thanks very much.

Use a garden hose pipe with jubilee clip.

Kind regards

Gary

MK Group Ltd

Thanks for the prompt reply. Much appreciated.