Flexible rubber joints buried guards Plenty of room left around, no way affect the performance of rubber joints displacement, and also make rubber joints filling with external isolation, also to make the pipe at both ends of the device to slide freely, without any resistance.After installing the pipeline through the backfill compacted ground still flat as ever. Vehicle to exercise, heavy objects or installed equipment are not affected. 

 Note: When ordering, be sure to provide buried deep, so we can set up your system a reasonable protection. The protection device as long as the installation of the surface treated with preservatives to do, and can be used for 30 years.