Patent ID: 9719621
Date: 2017-08-01
CPC Classifications: F16K,F16L,Y10T

Claim:
1. A snap tap forming method of forming a snap tap equipped with a gate valve, comprising fixedly attaching the gate valve to a peripheral wall of a water pipe and forming a hole in the peripheral wall of the water pipe with a drill body of a drilling machine which is advanceable and retractable in the inside of a water flow sleeve of the gate valve, wherein a partition wall which is formed along a curvature of an outer peripheral wall of the water pipe is hermetically brought into pressure contact with the outer peripheral wall of the water pipe and is mounted on the outer peripheral wall of the water pipe at a position which corresponds to an inflow opening portion of the gate valve and at which a snap tap of the water pipe is formed, and a center drill guide hole which is aligned with an axis of the snap tap is formed in a center portion of the partition wall by drilling, and in forming the hole in the water pipe by drilling, a center drill of the drilling machine which is inserted into and accommodated in the inside of the water flow sleeve of the gate valve in an advanceable and retractable manner is inserted into the center drill guide hole, and a water diverting port is formed in the partition wall and the peripheral wall of the water pipe using a core drill by advancing the drilling machine while estimating a drilling center and, thereafter, the drilling machine is removed from the inside of a water flow passage in the gate valve, and the snap tap is communicably connected to the water diverting port by a snap tap attaching tool provided separately.