Catalysis of the reaction: alkyl halide + H2O = alcohol + HCl. Substrates are 1,3(R),4,6(R)-tetrachloro-1,4-cyclohexadiene (forms 2,4,5-trichloro-2,5-cyclohexadiene-1-ol) and 2,4,5-trichloro-2,5-cyclohexadiene-1-ol (forms 2,5-dichloro-2,5-cyclohexadiene-1,4-diol).