最終更新日：2025/11/29
When installing a kitchen island where a standard vent stack to the roof was not possible, the plumber installed an air admittance vent to allow air into the drainage system without letting sewage gases escape.
正解を見る
When installing a kitchen island where a standard vent stack to the roof was not possible, the plumber installed an air admittance vent to allow air into the drainage system without letting sewage gases escape.
音声機能が動作しない場合はこちらをご確認ください
編集履歴（0）
