Concealed embedded component

A concealed embedded component, wherein comprising:

• a lower main body with a cool water inlet passage, a hot water inlet passage, a mixing water passage and at least an outlet passage, the cool water inlet passage, the hot water inlet passage, the mixing water passage and the outlet passage are respectively disposed with an inlet and an outlet;
• an embedded box, comprising a box body and a fixing frame covering the box body, the side wall of the box body is disposed with a cool water hole, a hot water hole and at least an outlet hole;
• a water testing element with the bottom surface disposed with a first passage and a second passage;
• the lower main body is disposed in the box body, the inlet of the cool water inlet passage is aligned with the cool water hole, the inlet of the hot water inlet passage is aligned with the hot water hole, the outlet of the outlet passage is aligned with the outlet hole;
• the water testing element is disposed in the box body, the water testing element covers the lower main body to make the outlet passage, the mixing water passage connected to the cool water inlet passage or the hot water inlet passage.