I need to replace some of the metal water pipes that use the id 8mm hose with hose but join then with little bits of metal pipes. How do you make those rounded protruding ends on the metal water pipes.

 

Is this something I can get from b&q or halfords and does it have a proper name.

you need a pipe flarer i think, never done it but gonna get one my self, same as brake pipes and what not....

 

http://www.machinemart.co.uk/shop/product/details/laser-pipe-flaring-tool

 

I think you want something along the lines of that?

thanks