Catalysis of the reaction: (5Z,9E,14Z)-(8x,11R,12S)-11,12-epoxy-8-hydroxyicosa-5,9,14-trienoate + H2O = (5Z,9E,14Z)-(8x,11x,12S)-8,11,12-trihydroxyicosa-5,9,14-trienoate.
(5Z,9E,14Z)-(8xi,11R,12S)-11,12-epoxy-8-hydroxyicosa-5,9,14-trienoate hydrolase activity