Patent ID: 8246084

Claim:
A threaded pipes and coupler system, said system comprising: a coupler made of polyvinyl chloride comprising: a permanent coupling end and a temporary coupling end, wherein the permanent coupling end and the temporary coupling end are configured with square-shaped threads on inner surfaces thereof; a groove for accommodating a wire lock, wherein the groove is provided on the inner surface of the coupler at the permanent coupling end; a tangential hole drilled at the permanent coupling end from an outer surface of the coupler to the inner surface of the coupler to meet the groove provided on the coupler for accommodating the wire lock; an inner sealing ring groove provided proximate to a middle portion of the coupler towards the permanent coupling end; and a milled groove provided on the outer surface of the coupler and located at the permanent coupling end of the coupler, wherein the milled groove and the groove for accommodating the wire lock are located adjacent to each other at the permanent coupling end of the coupler; a first pipe and a second pipe, each made of polyvinyl chloride and comprising square-shaped threads on an outer surface and a groove located at an end of the square-shaped threads and on the outer surface of each of the pipes, wherein the first pipe is connected to the permanent coupling end of the coupler and the second pipe is connected to the temporary coupling end of the coupler; an inner sealing ring provided at the inner sealing ring groove of the coupler; and a wire lock, wherein the wire lock is inserted into the tangential hole and passed through a circumferential passage formed by matching the groove made on the coupler with the groove made on the outer surface of the first pipe after complete threading of the first pipe with the coupler for accommodating the wire lock to lock the coupler and the first pipe to form a permanent joint.