Compared with the traditional water stop rod, what are the advantages of using three-stage water stop screw?

Three-stage water stop screw is mainly for the convenience of construction friends to buy and use, with many benefits. When buying, we only need to provide the thickness of the wall, that is, the length of the inner rod, while the length of the outer rod is fixed and can be reused. The joint nuts connecting fittings can also be recycled, which is convenient to place and distinguish during transportation. In the foundation waterproofing of large-scale underground engineering, buying a new water stop screw is also a hard index and its saving.