Hi Guillermo,  Have a look ...

Hi Guillermo, 

Have a look at Aqualiner - it's a trenchless technology which totally seals the pipe from the inside by adding a thermo-composite sleeve. www.aqualiner.co.uk It has been utilised by a number of water companies in the UK  on drinking water and sewer lines made of various materials including PVC. See a helpful video here http://www.aqualiner.co.uk/videos/animation-aqualiner/

Hope this helps. Sarah