I have a flexi pipe currently connecting the isolating valve in the cold feed to the plastic valve at the bottom of my toilet cistern. Even I can see that the flexi pipe is bent way too much and way too sharply. Sooner or later, it's going to spring a leak. However, due to the location of both ends, it is not possible to have the flexi pipe any other way. In any case, flexis have a very bad rep on this site. So what fitting should I use to connect to the plastic end? The isolating valve will take a compression fitting with female thread at one end I think? Pictures or links will be helpful. Thanks.