Drawing design, drain cross dry pipe is flexible cast iron pipe, vertical pipe is PVC pipe joint. When it needs to change the diameter, what kind of pipe fittings should be adopted for big head?
Yes, there is one more question. How does the cast iron connect with the PVC? It doesn't leak. It's also a problem.The impact force does not matter, PVC three all have it should have a radian cushioning effect, can also be used in spiral PVC tube ah, although it is quiet, but also can ease the impact. I think it's hard to interface cast iron with PVC.
But in actual construction, because the special AD type bottom joint is more expensive, the construction unit usually adopts the cast iron pipe elbow to deal with the problem of reducing the diameter of the two kinds of materials.
The transverse drain pipe is a flexible cast iron pipe. The vertical pipe is PVC pipe joint. When it needs to change the diameter, it is most suitable to use a special AD type bottom joint.
