With cistern at 17/ΟΕ-ΟΣΤ (P 10:2), two chambers connected by a passage. 18/Π went out of use first and was closed off from 17/ΟΕ-ΟΣΤ; filled up at one time with material dating between 350 and 300 B.C ... 325-285 B.C.