Constant flow rate valve built-in water supply piping and water supply valve device

摘要

PROBLEM TO BE SOLVED: To prevent reverse assembly of a spacer and a constant flow valve in constant flow valve built-in water supply piping.SOLUTION: Constant flow valve built-in water supply piping includes an inflow port 18 which is connected to a water supply pipe connected to a water supply source, an outflow port 19d which allows water flowing in from the inflow port 18 to flow out to the downstream side, a water flow passage 19a which allows the inflow port 18 and the outflow port 19d to communicate with each other, and a constant flow valve 50 which is provided in the water flow passage 19a. The water flow passage 19a includes a small diameter water flow passage which is provided on the outflow port 19d side and to which the constant flow valve 50 is fitted, and a large diameter flow passage which is provided closer to the inflow port 18 than the small diameter water flow passage and has a diameter larger than that of the small diameter flow passage. A cylindrical spacer 70 having one end abutted to the water supply pipe and the other end abutted to the constant flow valve 50 and fitted to the small diameter water flow passage is disposed in the large diameter water flow passage, and a cutout portion is formed on a cylinder end side of the spacer 70 by cutting a part thereof.SELECTED DRAWING: Figure 3