| 摘要 |
PURPOSE: A check valve of water gauge protective case is provided to extend the service life of the check valve using a simple structure which does not have rubber packing and spring. CONSTITUTION: A check valve of water gauge protective case comprises a valve opening and closing part(11d), a main body(11), an insertion area(13b), and a shaft supporting part. The valve opening and closing part is included in the inner circumference of the first connector connected to the outlet side pipe of a water gauge. The second connection part connected to the water service pipe. |
