motosen o shimeru

もとせんを　しめる

to close the main valve (water/gas etc)

Example

でかける　まえに　かならず　ガスの　もとせんを　しめて　ください。

Please be sure to turn off the gas mains before you go out.

Tags for this word

• Safety
• Instruments/Tools

• kaijobaa
• kagi
• kondoomu
• shoukaki
• shoukasen