元栓 もとせん Meanings Noun stopcock (gas, water); main valve; main tap; stop tap Kanji 元 source. Read as もと. 栓 stopper. Read as セン. Example sentences ガスの元栓は閉めた?Did you turn off the gas? ガスの元栓を閉めなさい。Turn off the gas. 元栓、しまってる。The main tap is turned off. ガスの元栓が閉まってるか、見といて。Check if the gas tap is closed. Jinuma: Japanese Dictionary · Word lists