Is it illegal to prevent leakage? Code for residential drainage.

In the past, there was no waterproof sealing material for traditional steel casing drainage, so serious leakage occurred in kitchens and bathrooms of many old houses. Because the place where the steel screws are tightened will rust and leak. The drain pipe has a jacket and a floor drain. This kind of waterproof casing is definitely higher, but the leakproof treasure and the pipe socket can be embedded in concrete. The drain pipes on the upper and lower floors can be directly plugged into the leakproof treasure. Leak-proof treasure has an inner ring of 3 to 5cm in design, which can ensure smooth drainage from top to bottom. Chaoyang plastic invented the patent anti-leakage treasure, which has an anti-seepage sealing ring to ensure that the drainage pipe does not leak. Their third-generation FLB-W leak-proof products can also prevent odor and exhaust, which not only solves the problem of balcony drainage.