Difference between rigid and flexible waterproof casing

Flexible water-proof casing is a hardware pipe fitting suitable for pipeline through the wall where there is vibration or strict waterproof requirements of the structure. Flexible waterproof casing through the wall of the wall, such as non-concrete walls should be replaced with concrete walls, and the casing once solidified in the wall; flexible waterproof casing is widely used in construction, chemical industry, steel, water, sewage treatment and other units.
 
Rigid waterproof casing is steel pipe plus wing ring (steel plate made of ring set on the steel pipe), installed in the wall (mostly concrete walls), for general piping through the wall, to facilitate the waterproofing of the wall; flexible waterproof casing in addition to the external wing ring, there are internal gear ring and so on, flange inside the wire, sold in sets, can also be processed by themselves, for the need to damp the pipeline, such as and pump connected to the pipeline through the wall. Mainly the use of different places, flexible waterproof casing is mainly used in the human defense walls, pools and other demanding places, rigid waterproof casing is generally used in the basement and other pipelines need to wear the location of the pipeline.
 
From the underground into the home of the pipeline through the building wall when you need to install a rigid waterproof casing. Casing through the wall (pool, plate, etc.). There are two types of rigid and flexible. After installation allows the amount of deformation - flexible; does not allow the amount of deformation - rigid.