hole through in. 스프링클러 헤드를 추가 설치하기 위해 파이프를 자르고 T 피팅을 추가할 필요가 없습니다. There is no need to cut pipes and add T fittings to install additional sprinkler heads Thread can be used to add sprinkler heads, vacuum breakers, or any additional accessory that will screw into in.