What are the setting criteria when using FRPP casing?

According to the casing installation specification, metal or plastic casing should be installed when the pipeline passes through the wall and floor. The height requirement of the casing installed in the kitchen and bathroom is 50mm higher than the decorative floor. Both ends of the bushing mounted on the wall should be flush with the finish. For suspended drainage under the floor, there should be no problem enforcing this requirement. Therefore, it is impossible to protect the environment from the secondary drain of the sewage treatment plant. During the construction of the RF coaxial connector composite pipe, the setting methods of the FRPP pipe during the construction process are different. There are two setting methods: expansion joint setting and pipe sleeve setting. Expansion joints should be set up in residential plastic drainage pipes according to the design requirements, generally one per floor, and the expansion joints should be set at the joints. When there are branch pipes on the same floor near the floor, expansion joints can be arranged in the middle of the pipes. The expansion joints of the horizontal pipes should also meet the design requirements. During installation, the rubber ring of the expansion joint of the FRPP pipe should face the water receiving direction.