Grouting Tube】Model (mm), also known as pressure grouting tube -- Outer Diameter: Model: φ25 (1/4 inch) φ32 (1 inch) φ48 (1.5 inches) φ60 (2 inches); Wall Thickness: 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.2, 3.25, 3.5. Pre-installed grouting tube system for sealing construction joints, cold joints, pipe渗缝, gaps between ground walls, etc. in concrete. Suitable for waterproofing joints in subway, tunnels, and basements. If leakage occurs, grout can be injected into the tube for filling and sealing. If no leakage is present, grouting is not required. When water渗入缝，grout can be injected through a PVC port or spring frame port on the surface to seal the joint. This method can seal the joints. The appropriate time for grouting is after the concrete curing process. Sealed joints with leakage can also be sealed using this method.