| 摘要 |
<p>PROBLEM TO BE SOLVED: To facilitate a hydraulic test after piping and connection of a pressurizing pump by rotatably fitting a joint opening for tests to the external face of a water stop valve body and providing a built-in check structure against reverse flow communicating with the inside of the stop valve at the joint opening body. SOLUTION: A cap is removed and a testing hose is connected to a mouthpiece. This structure is constituted of a joint fitted to the hose end and a box nut fixing the joint. In this case, the hose is connected to the mouthpiece by making use of a joint tool and a pump is connected to the joint tool at the other end of the hose to pressurize water. This pressure is transmitted to all pipe lines through a holder 21. Hence, the hydraulic pressure is measured at a water supply valve or a first water stop valve to make it possible to check water leakage in the pipe line. Accordingly, when a testing joint opening 25 is attached to carry out hydaulic tests after piping, a pressurizing pump is directly connected to the opening 25. In this way, tests can be simply and rapidly carried out and the joint opening 25 is rotatably connected to the body and the joint direction can be freely changed to improve the workability on connecting it.</p> |
