Nahani trap has only ,10 mm water seal which is not reccomended by any plumbing code . P trap is always reccomended. In vertical drainage pipe plain tee also not reccomended . Using plan Tee cause back flow Always swept tee or else Y reccomended which Always use union along with ball valve
It is a good system of Plumbing for easy maintenance. On exterior side, minimum 3 inches setback from the wall is recommended for PVC pipes using clamps so that joints not to get concealed into wall. P trap is recommended instead of Nahani Trap. Anchoring of PVC pipes to the ceiling is recommended to avoid fittings disjointed.
Bhai jo waste n soil line diya hai usko hanging support dena chahiye or jo ball valve diye ho usko terrace par hi dena chahiye or ek concealed stop valve har bathroom me separate dena chahiye
